ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 635 



The colour is usually yellowish-brown when the animal is attached 

 to Stephanodiscus niagarse, but sometimes green, when on Cladophora 

 glomerata; this latter condition is regarded as a young stage. In 

 PodopJirya diaptomi the body is pyriform, elongate, with transparent 

 protoplasm, the granules in which are larger anteriorly than 

 posteriorly. The numerous tentacles are not distinctly capitate and 

 are arranged in three fascicles. The nucleus is spheroidal. The 

 young are nearly spherical and the tentacles are then arranged 

 irregularly. The animal is usually attached to the under side of the 

 body-rings of its host, Diaptomus sp. Platycola intermedia is now 

 regarded by the author as a species distinct from P. longicollis with 

 which he previously placed it as a variety ; his reasons are founded 

 on the shorter and not funnel-shaped neck. 



Amongst the Ciliata he describes as new species : — Epistylis 

 cambari, which is found on the gills of various species of Cam- 

 banis in Niagara river. The body is broadest in the middle and 

 somewhat attenuate posteriorly. The disc is narrow, the peristome 

 ■thickened. The stout pedicle is bent in large colonies, and usually 

 branches on one side only. By the shape of its disc it is allied to 

 Umbilicata, but the different form of the body and pedicle clearly 

 separate them. 



Vorticella rhabdostyloides has a nearly globular body, peristome 

 thickened, nucleus thick and but slightly curved. This species was 

 found plentifully in Niagara, attached to Stephanodiscus Niagarse and 

 other diatoms. 



Gerda sigmoides was usually found in pairs ; the body is very 

 flexible ; the posterior tapers nearly to a point, the anterior is grace- 

 fully curved. 



Mesodinium recurvum has a globose body, with only a short snout- 

 like process. At about one-third the length of the body is a girdle 

 of cilia bent backwards ; above this is a wreath of long cilia. It 

 closely resembles Halteria volvox in its jumping action. 



Strombidium oblongum, and Trachelomonas torta, are other new forms 

 described. 



A new genus, Diplostyla, is formed from a species, D. inlisesa, 

 found in swamp water among algae at Point Abino, Ontario. It 

 inhabits an ovate membranous tube, open at both ends ; the body does 

 not protrude, but water passing through the tube carries the food to 

 the animal, and in this seems to resemble Oxytricha tubicola. The 

 body cilia are fine and long ; mouth behind the centre of the body ; 

 undulating membrane long ; adoral cilia stronger than body cilia ; 

 posteriorly some setose cilia ; budding was observed. 



Parasites of the Blood.* — Prof. B. Danilewsky describes a 

 number of Ha3matozoa observed by him during his study of blood- 

 parasites. With the exception of Bacteria and Vermes the parasites 

 probably all belong either to the Sporozoa or to the Flagellata. Aa 

 to their entrance into the vascular system, Prof. Danilewsky supports 

 the theory that an important part in the transport (from the ali- 



* Biol. Centralbl., v. (1885) pp. 529-37. 



