ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 199 



organisation, has small unpigmeuted ocelli. This seems to him»to sup- 

 port his view that subterranean life does not induce blindness. 



y- Prototracheata. 



Habits of Peripatus capensis.* — Prof. E. L. Bouvier records his 

 observations on a living specimen. He notes its lucifngous habits, its 

 mode of raising the front of the body in tentative exploration, the 

 mobility of the tentacles, the remarkable mechanism of locomotion, and 

 the ejection of the mucus from the oral papilla?. 



American Species of Peripatus.j — Prof. E. L. Bouvier continues 

 his observations on the species of Peripatus, distinguishing in this com- 

 munication two distinct American sections — the "Andicolous " from the 

 Andes, &c, and the " Caraib " from the Antilles, &c, both well repre- 

 sented. 



S. Arachnida. 



Spiders and other Arachnids of Edinburgh District.} — Messrs. Q. 

 H. Carpenter and W. Evans have raised their list of Arachnids from the 

 Edinburgh district to 191 species, the present communication accounting 

 for twelve, six of which are new to Scotland. Perhaps the most inter- 

 esting record is that relating to Prosopotheca monocems Wid., the female 

 of which has not previously been obtained in the British Isles. 



Kedani-Disease.§ — Dr. Ke'isuke Tanaka has continued his study of 

 this mysterious Japanese disease which is associated with the presence 

 of a larval mite. He has now good reason to think that the disease may 

 be due to the association (now proved) of a Proteus bacillus — like Proteus 

 hauseri — with the mite. 



Parasitism in Hydrachnida.|| — Carl Thon has found a normal 

 nymph of Hydrypliantes dispar Schaub, parasitic upon Paludina con- 

 tecta. The Hydrachnid was firmly fixed, and could not be removed 

 without cutting the mantle of the snail. The author is inclined to be- 

 lieve that this parasitism — which has not been hitherto observed — must 

 be common, and explains the peculiar form of the mouth-parts in Hydry- 

 pliantes, Diplodonius, Eupatra, Thyas, &c. He has found the last named 

 cenus on the shells of both Paludina and Planorbis, and believes that 

 the absence of swimming bristles in it is a further adaptation to a para- 

 sitic life, 



e. Crustacea. 



Regeneration in Hermit Crabs.1T — Prof. T. H. Morgan made, two 

 years ago,** a series of experiments on the regeneration of the appendages 

 of a hermit-crab (Eupagurus longicarpus), the conclusion of which was 

 that there is no de^nite relation between the regeneration of a part and 

 its liability to injury. He now reports upon a new set of experiments. 



At the base of the walking legs, between the fifth and sixth segments, 



* Coraptes Rendus, cxxix. (1899) pp. 971-3. 



t Tom. cit., pp. 1029-31. Cf. this Journal, 1S99, p. 484. 



t Proc. Roy. Phys. Soc. Edin., xiv. (1898-9) published 1900, pp. 16S-81. 



§ Centralbl. Bakt. u. Par., xxvi. (1899) pp. 432-9 (2 pis.). 



j| Verb. Zool.-bot. (Jes. Wien, xlix. (1899) pp. 484-5. 



«[[ Anat. Anzeig., xvii. (1900), pp. 1-9 (19 figs.). ** Zool. Bulletin, i. (1898). 



