Journal of the Royal Microscopical SocietyRoyal Microscopical Society, 1889 ... containing its transactions and proceedings and a summary of current researches relating to zoology and botany (principally Invertebrata and Cryptogamia), microscopy, &c. |
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Common terms and phrases
acid alcohol animal apparatus appear appendages arranged axis bacilli bacteria belonging body canal capillitium cavity cells cent central Centralbl chitinous cilia cœlom colour connected consists cover-glass crystals described diameter diatoms dorsal ectoderm eggs elaters embryo endoderm epithelium examined eye-piece female fibres filaments fluid fungi ganglion gelatin genera genus glands glass insects Journ Journal large number larva larvæ latter layer lens lower mass membrane Micr Microscope microtome minutes muscles nephridia nerves nervous system nucleus object observations oesophagus optic organs Oribatida ovum parasitic pigment placed plate portion posterior Prof pronuclei protoplasm Rost Rotifer Rotifera Sacc screw sections seen segments side slide solution species specimens spermatozoa spirals Sporangia sporangium spores spores globose stage stained stem structure substance surface tentacles terminal thick thin tips tissue transverse Trichia tube vacuoles vesicle walls Wiss yellow Zeitschr Zool zoospores
Popular passages
Page 32 - EIMER (GHT)-— ORGANIC EVOLUTION AS THE RESULT OF THE INHERITANCE OF ACQUIRED CHARACTERS ACCORDING TO THE LAWS OF ORGANIC GROWTH. Translated by JT CUNNINGHAM, MA 8vo.
Page iii - Charter in 1866.) The Society was established for the promotion of Microscopical and Biological Science by the communication, discussion and publication of observations and discoveries relating to (1) improvements in the construction and mode of application of the Microscope, or (2) Biological or other subjects of Microscopical Research.
Page 49 - I have always found that though the blind woodlice (Platyarthrus), which live with the ants, have no eyes, yet if part of the nest be uncovered and part kept dark, they soon find their way into the shaded part. It is, however, easy to imagine that in unpigmented animals, whose skins are more or less semi-transparent, the light might act directly on the nervous system, even though it could not produce anything which could be called vision.
Page 34 - ... is separation or segregation. CUMULATIVE SEGREGATION AND THE CLASSIFICATION OF ITS DIFFERENT FORMS. The fundamental law to which I would call attention may be expressed in the following formula : Cumulative segregation produces accumulated divergence and accumulated divergence produces permanent segregation, and the segregate subdivision of those permanently segregated produces the divisions and subdivisions of organic phyla.
Page 314 - The American Association for the Study and Cure of Inebriety,' the sum of one hundred dollars is offered by Dr. LD Mason, vice-president of the society, for the best original essay on ' The Pathological Lesions of Chronic Alcoholism Capable of Microscopic Demonstration.
Page 33 - ... accelerating variation in other cases " (p. 504). On page 499 I pointed out the law that " The area occupied by any species must vary directly as its power and opportunity for migration, and inversely as its power of [divergent] variation." And on page 505 I gave a brief summary of my reasons for believing that "Separation without a difference of external circumstances is a condition sufficient to ensure . . . divergence in type.
Page 118 - Brockie-Pell arc lamp, but if necessary a lime-light can be readily substituted. The lamp is fixed to the base-board, and the body can be rotated through 60° on either side of the central position, thus allowing any of the three nozzles to be directed towards the screen. The three sets of condensers are placed so that their axes intersect at a point about which the radiant is placed. The centre nozzle is fitted as a lantern microscope, with...
Page 207 - The larva of Stauropus fagi therefore bristles with defensive structures and methods. When at rest it is concealed by a combination of the most beautiful protective resemblances to the commonest objects which are characteristic of its food-plant. Attacked, it defends itself by a terrifying posture, which is made up of many distinct and highly elaborate features, all contributing to this one end. Further attacked by an insectenemy, it reveals marks which suggest that it is of no interest to its enemy,...
Page 185 - The larva. The larva of Psamathiomyia is linear, vermiform, and of a yellow color. The apparent number of segments of the body, including the head, is twelve, one for the head, three for the thorax, and eight for the abdomen. The thoracic segments are shorter than the following; the apical one, into which the head is retractile, being the smallest. The thoracic anterior inferior angles of the somites carry inconspicuous minute bristly tubercles, while the abdominal segments, with the exception of...
Page 182 - ... the female being simple. The comb-like appendages are similar in both sexes. The external genitalia of the male consist of a powerful twojointed pair of forceps, the lower joints of which are large, massive, subglobular, while the terminal joints are small and linear, and so articulated to the first as to curve inwardly between them when not in use. These terminal joints of the forceps carry at their tips an armature of short, sharp, scattered, horny spines. The ovipositor of the female is conical,...