ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 721 



New Fresh-water Polyzoon from South Africa.* — Igerna B. J. 

 Sollas describes Lophopus capensis sp. n., from near Cape Town. It is 

 the ninth species of Polyzoa from South Africa. The new species is 

 referred to the genus Lophopus on account of its thick gelatinous 

 ectocyst and the form of its statoblasts, which are elliptical and rendered 

 pointed by the possession at each end of a long process. The process 

 is expanded at the base and beset on each side with a double row of 

 recurved hooks, which extend with the expanded base along the edge 

 of the statoblast. A description is given of the germination of the 

 statoblast, the young individuals, the budding, and a young colony. 



Echinoderma. 



Hermaphroditism in a Sea-urchin.f — Gr. Gadd reports a case of 

 hermaphroditism in Strongylocentrotus drmbaehiensis, < >. F. Mull. There 

 was in one of the gonads an apical ovarian portion, and an oral testicular 

 portion, the latter the riper. 



Antarctic Holothurians.J — Clement Vaney reports on the important 

 collection made by W. S. Bruce on the Scottish Antarctic Expedition. 

 It includes two species of Synallactidae, eleven of Elasipoda (4 Elpiida? 

 and 7 Psychropotidaj), and ten of these are new. There are also 

 numerous Oucumariida?, chiefly from the South Orkneys, and ten of 

 these are new. 



Vaney notes that Psolidium coatsi and Gucumaria p sol id if or mi* and 

 O.co/ispicuaave interesting transitional forms connecting the two genera. 

 Another species, G. armata, has great affinities with the genus Colochin/s. 



G-lands of Crinoids.§ — A. Reichensperger has studied Antedon rosa- 

 cea, Actinometra parvkirra, and Pentacrinm decorus. He finds glandular 

 cells in the epithelium of the ambulacra! grooves in females of Antedon, 

 the secretion of which fastens the liberated egg to the pinnules. In all 

 the three forms mentioned there are glandular cells in the tentacular 

 papilhe. possibly with some protective function. 



New Antarctic Crinoid.|| — -F. A. Bather describes Ptilocrinus 

 antarcticus sp. n., which was dredged by the Belgian Antarctic Expedition 

 from about 480 metres in 82° 47' W., 70° 23' S. A diagnosis of the 

 genus and of the species is given. 



Coelentera. 



Green Bodies of Hydra viridis.f — I). D. Whitney finds that if a 

 green hydra be placed in a weak glycerin solution (1 ■ 5-5 per cent.), 

 the "algae" pass from the endoderm-cells into the gut cavity and pass 

 out at the mouth when the animal contracts. The clear Hydra placed in 

 pure water will live and feed*and bud. If the pale animal be kept for 

 a time in well water and then put into a basin with green hydra and 

 algae, it does not become infected again, but remains pale. 



* 



* Ann. Nat. Hist., ii. (1908) pp. 264-73 (8 figs.). 



+ Trav. Soc. Nat. St. Petersbourg, xxxviii. (1907) pp. 211-18 (1 pi.). See also 

 Zool. Zentralbl., xv. (1908) p. 543. 



\ Trans. R. Soc. Edinburgh, xlvi. (1908) pp. 405-41 (5 pis.). 

 6 Zool. Anzeig., xxxiii. (1908) pp. 363-7 (3 figs.). 



|| Bull. Classe Sci. Acad. Rov. Belgique, 1908, No. 3, pp. 296-9 (1 fig.). 

 i Biol. Bull., xiii. No. 6, 1907. See also Zool. Zentralbl., xv. (1908) p. 468. 



