ZOOLOGY AND BOTANY, .MICROSCOPY, ETC. 585 



New British Records of Water-mites.*— G. P. Deeley adds to the 

 list of water-mites that occur in Britain — Thyopsis caneellata Protz, 

 Sperchon glandulosits Koen., and Lyania bipapillata Sig. Thor. 



Swiss Hydrachnids.f— Charles Walter has given a useful account of 

 the Swiss water-mites, of which 156 species are now known. He has 

 added 15 new species, and made 47 new records. He distinguishes 

 cosmopolitan forms (with wide distribution' both horizontally and 

 vertically) and northern alpine forms, stenothermal inhabitants of cold 

 mountain waters. 



Metamorphosis of Species of Echiniscus.J— F. Heinis finds that 

 many species of Echiniscus, with four claws and numerous filaments and 

 spines as adults, have a juvenile stage with two claws and only a few 

 filaments. 



Marine Tardigrada.§— F. Richters has some notes on Echmiscoides 

 sigismundi M. Schultze, and describes Halerhiniscus guiteli g. et sp. n., 

 and two new species of Macrobiotics. 



6 - Crustacea. 



Abnormality in a Crayfish. ||— A. Briot describes a male crayfish 

 with a peculiar second-last thoracic limb. The coxopodite and basi- 

 podite were normal, the ischiopodite showed two articular surfaces, the 

 outer one bore four normal joints, the inner one bore four smaller 

 joints curved in the opposite direction — as if it were a piece of a right- 

 hand appendage. 



Variation of Squilla investigatoris.H— R. E. Lloyd finds that in 

 17 individuals the number of spinous teeth on the'dactyle of the 

 raptatorial claw varies from 10 to 18. Furthermore they show 11 different 

 types of arrangement when the teeth on both claws are considered. 

 This feature, so variable in this species, seems to be relatively stable in 

 other species. The theoretical possibilities of interpretation are dis- 

 cussed. The facts of the case do not seem to be in favour of the 

 " theory of gradual change." 



Alimentary Canal of Schizopods.**— Charles Gelderd gives an 

 anatomical and physiological account of the gastric mill, the mid-gut, 

 the mid-gut glands, and the intestine in My sis, Siriella, Nyctvphanes, 

 and other forms. 



New Species of Cirolana from a Spring in the Sahara, ff 

 Robert Gurney describes Cirolana fontis sp. n., from a freshwater spring 

 in the Algerian Sahara. The species is evidently of subterranean origin, 



* Journ. Quekett Micr. Club, 1907, pp. 173-6 (1 pi.). 



+ Revue Suisse Zool., xv. (1907) pp. 401-573 4 pis.). 



J Zool. Anzeig., xxxiii. (1908) pp. 69-71. 



§ Tom. cit., pp. 77-85 (4 figs.). 



|| C.R. Soc. Biol. Paris, lxiv. (1908) pp. 777-8 (1 fig.). 



t Records Indian Museum, ii. (190S) pp. 29-35 (2 pis.). 



** La Cellule, xxv. (1907) pp. 7-70 (4 pis.), 



ft Zool. Anzeig., xxxii. (1908) pp. 682-5 (5 figs.). 



