ZOOLOGY AND BOTANY, MICKOSCOPY, ETC. 589 



Genus Hoplolaimus.*— R. Menzel discusses this genus of free-living- 

 Nematodes. It seems to be synonymous with Jota Cobb, Ogma Southern, 

 and Criconema Hofmauner and Menzel. Nine species are recognized as 

 well defined, and a useful comparative table is given showing how 

 these differ. 



Nematodes from Russian Birds.f— K. L Skrjabin describes Hahro- 

 nema seurati sp. n. from Fako cenchris, and species of Acuaria, AscariiUa, 

 Filaria, Aprocta, and Cortortospiculimi. For the last genus and for 

 Diplotrisena (represented in the collection by D. hargusinica sp. n. from 

 a^ species of Turdus), the new sub-family of Diplotriajniuse is established. 

 The members are Filariidte with chitinous structures beside the mouth 

 and in the oesophagus, tending to a tripartite arrangement, with two 

 large unequal spicules. 



Platyhelminthes. 



Cestodes from Japanese Selachians.^ — Sadao Yoshida describes 

 ten species of Cestodes, including Orygmatobothrmm velamentum sp. n. 

 from Gynias manazo, Acanthobothrium ijimai sp. n. from Dasyatis akaei, 

 CalUobothrium convolutum sp. n. from Gynias manazo, G. nodosum sp. n. 

 from the same, and Rhynchobothrium laciniatum sp. n. from the same, 

 all from the spiral valve. These forms have numerous interesting 

 features, e.g. the six triangular flaps projecting from the posterior border 

 of the proglottid, which are well illustrated. 



Life-History of Proteocephalus.§— A. R. Cooper has made a study 

 of Froteocejjhalus ambloplitis Leidy, a cestode parasite of the Black Bass. 

 The plerocercoid larva occurs in various organs. Different stages are 

 described, and an account is given of the minute structure. The 

 evidence points to F. ambloplitis having at least two intermediate hosts : 

 the first, some unknown species of aquatic Arthropod ; and the second, 

 either different species of minnows and small perch or the final host 

 itself. Barbieri has collected evidence which goes to show (not quite 

 conclusively) that the oncosphere of F. agonis develops into a young 

 plerocercoid in Bgfhotrephes and Leptodora. Cooper describes the 

 mature oncosphere of F. ambloplitis, which shows six hooks and three 

 membranes. 



Japanese Triclads.|l— Tokio Kaburaki describes Ectoplana g. n. from 

 Limulus longispina. The body is narrowed at each end but blunt, 

 usually milky white, without tentacles, with two eyes somewhat distant 

 from the head-end, with the posterior branches of the gut united, with 

 reproductive organs approaching those of Frocerodes. Other Triclads 

 from the King-Crab have belonged to the family Bdellouridae ; this new 

 form belongs to the Procerodidse. The author also describes Folycelis 

 ijimai sp. n. from a stream at Hokkaido, and gives a diagnostic key for 

 Japanese Triclads. 



* Rev. Suisse Zool., xxv. (1917) pp. 153-62. 



t Parasitology, ix. (1917) pp. 460-81 (2 pis.). 



t Parasitology, ix. (1917) pp. 560-92 (1 pi. and 4 figs.). 



§ Contributions to Canadian Biology, ii. (1915) pp. 177-94 (3 pis.). 



Il Annot. Zool. Japon, ix. (1917j pp. 324-33 (2 figs.). 



