1154 SUMMARY OF CURRENT RESEARCHES RELATING TO 



from Doflein's collection on the Californian coast, in which young forms 

 of various sizes occurred irregularly attached to the outer wall of the 

 adults with their bases surrounded by a slight rampart of ectoderm. 

 The habit may be correlated with the occurrence of cold currents from 

 the deep water. In any case, it seems to be a new mode of protective 

 association between the young sea-anemones and the adults. 



Protozoa. 



New Infusoria.* — R. Florentin describes Loxophyllum verrucosum 

 sp. n. and Strombidium elegans sp. n. from salt ponds in Lorraine. The 

 first is nearly allied to L. fasciola — which was absent from the ponds 

 studied — but differs in the arrangement of the trichocysts and some 

 other points. The new Strombidium is especially characterised by its 

 locomotor apparatus, which consists of about twelve finely-fringed 

 projections (" membranelles "), forming an anterior collar. The paper 

 also includes a brief discussion of the fauna of saline lakes in general. 



Division of Hypotrichous Infusoria.f — Dr. Hans Wallengren has 

 investigated the question of the extent to which the regenerative process 

 takes place during transverse division in these Infusoria. He finds that 

 in both daughter-cells the whole of the cilia, including all the forms of 

 so-called bristles, are renewed, as well as at least a considerable portion 

 of the old follicle. In the posterior daughter-cell the peristome is 

 entirely renewed ; the anterior daughter-cell retains the original 

 peristome, but it also is largely renewed in all cases, and in e.g. 

 Holosticha rubra, is wholly replaced by a new structure, the old being 

 completely absorbed. In no case is there a throwing-off of any part of 

 the body, but always absorption. The total renewal of the cilia is 

 justified by the fact that the mother-organs are not adapted to the needs 

 of the new cells in size or position. The regenerative processes during 

 division serve also to repair accidental injuries. 



Drepanidium in Snakes.J — Dr. Adolph Lutz has found in the blood 

 of various snakes at San Paulo, Sporozoa which he believes all belong 

 to a new species, which he provisionally describes as Drepanidium 

 serpentium. The organisms occur in the following forms : — within the 

 red blood-corpuscles of circulating blood, as microzoites and macro- 

 zoites ; in the blood-capillaries of such organs as liver, lung, kidney, as 

 free sporonts ; in little clusters in the same organs as macrosporozoite- 

 cysts and microsporozoite-cysts, these cysts having apparently arisen from 

 encysted sporonts. Though macrozoites and microzoites present respec- 

 tively the characters of female and male elements, yet no evidence of a 

 process of conjugation was discovered. Further, there was much 

 evideuce to show that the microzoites, no less than the macrozoites, are 

 capable, after ency station, of producing fresh individuals without any 

 sexual process. The process of infection of other snakes also remains 

 obscure. 



Hsematozoa of Frog and Tortoises.§— Popovici A. Baznosano finds, 

 in the red blood-corpuscles of Bana esculenta : — (1) Labbe's Cytamoeba 



* Ann. Sci. Nat. (Zool.), xii. (1900) pp. 343-63 (1 pi.). 



t Zool. Jahrb., xv. (1901) pp. 1-58 (1 pi. and 28 figs.). 



t Centralbl. Bakt.. V Abt., xxix. (1901) pp. 390-8 (1 pi.). 



§ Bull. Soc. Sci. Bucarest. x. (1901) pp. 329-35 (12 figs.). 



