460 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Kowalevsky's lymphatic glands, that is to say behind the coxal glands 

 at the boundary between cephalothorax and abdomen. The minute 

 structure of the glands is described. No phagocytic activity was ob- 

 served, but it was very marked on the lung-books. 



Irish Spiders.* — Denis R. Pack-Beresford publishes a supplement 

 to Professor Carpenter's list of 1898, adding no fewer than 58 species. 

 Most of these are among the smaller and less common kinds, which, 

 owing to their size, or the obscurity of their habitats, have been hitherto 

 overlooked. 



Arachnids of Caves.t— Angela Gozo gives a list of spiders and 

 mites found in Italian caves, and distinguishes between those which 

 may occur in caves and those which are strictly cavernicolous. The 

 garden spider occurs in caves, but it is not cavernicolous like Porrhomma 

 proserpina, or Nesticus speluncarum. He deals with 55 species, but the 

 majority are not in the strict sense cavernicolous. Two new species are 

 described, Leptyphantes sardoa and Porrhomma pedemontanum. 



Mange in Rats. J — W. Schurniann describes a cutaneous disease in 

 rats, affecting especially the nose, ears, feet, and tail, and very seriously 

 disturbing the health of the animals. It seemed to be due to a species 

 of Sar copies. 



Atax and Unionicola.§ — W. Williamson agrees that the name Atax 

 is invalid, as Oudemans and Walcott have shown, and that there is no 

 choice but to replace it by Haldemann's Unionicola, which suggests the 

 habitat of these fresh-water mites on the gills of fresh-water mussels. 

 Thus Atax ypsilophorus must be changed to Unionicola ypsilophorus 

 (Bouz.). Dura lex sed lex. 



Demodex and Leprosy. [| — A. Borrel points out that in patients 

 with nasal leproma the specimens of Demodex in the follicles and 

 sebaceous glands are covered with microbes, and suggests that it is 

 through Demodex that the disease passes from one host to another. 

 Indirect evidence may perhaps be forthcoming by endeavouring to 

 destroy Demodex in leprous patients and in those exposed to contagion. 

 Treatment of the face with xylol and the like is suggested. 



e. Crustacea. 



Experiments on Locomotion of Crabs. U — Anna Drzewina refers to 

 the well-known fact that a crab whose oesophageal nerve-ring has been 

 cut on one side moves thereafter in a circle. She has observed, how- 

 ever, a very interesting fact, that after some time, e.g. a fortnight, the 

 power of moving in a normal way is restored. It is not known how 

 this is effected — whether by some auto-regulation within the nervous 



* Proc. R. Irish Acad., xxvii., Section B, No. 7 (1909) pp. 87-118. 



t Bull. Soc. Entomol. Ital., xxxviii. (1908) pp. 109-39. 



t Centralbl. Parasitenk., xlviii. (1908) pp. 167-72 (7 figs.). 



§ Proc. R. Phys. Soc. Edinburgh, xvii. (1909) pp. 223-4. 



|| Comptes Rendus, cxlviii. (1909) pp. 50-1. 



t C.R. Soc. Biol Paris, lxv. (1908) pp. 320-2. 



