1907.] ON NEW H^MOGRBGAUINES. 283 



with numerous irregular transverse folds and a distinct longitu- 

 dinal groove on ventral surface. Anterior extremity 2-5 mm. 

 broad ; head completely invaginated. Posterior extremity 2 mm. 

 broad, with shallow median slit. Extracted from an abscess on 

 the thigh of a Masai in British Central Africa. 



ScHiSTOSOMUM MANSONi Sambon. 



Abstr. P. Z. S. 1907, p. 16 (March 26). 



Habitat. Blood-vessels of Man. 



In the Congo Free State, in other parts of Africa, and in the 

 West Indies there is a form of Bilharziasis clinically and patho- 

 logically similar to the Asiatic form caused by /Schistosomum 

 japonicum, and unlike the classic East African form diie to 

 jS. hcBmatobmm. The eggs of the species which causes this peculiar 

 form are never found in the urine, but seem to be eliminated 

 through the intestine only. They differ from those of S. hcema- 

 tohium in having a broad lateral spine totally difterent in size, 

 shape, and position from the small, straight, terminal spine which 

 characterises the ova of ;S'. hcematobmm. Hitherto, the laterally 

 spined ova, usually observed in Egypt in cases of mixed infection, 

 have been looked upon as having been distorted while passing 

 through the rectal mucosa. Sir Patrick Manson suggested several 

 years ago, that the laterally spined ova found in the fseces of 

 patients, and never in the urine, might represent a new species. 

 In appreciation of this, one of his many genial intuitions, the new 

 species is dedicated to him. 



2. Descriptions of five New Species of Hsemogregarines from 

 Snakes. Bj L. W. Sambon, M.D., F.Z.S., and C. G. 

 Seligmann, M.D., F.Z.S.* 



[Received March 19, 1907.] 



H^MOGREGARiNA pococKT Sambon. 



Abstr. p. Z. S. 1907, p. 16 (March 26). 



Habitat. Erythrocytes of Indian Python, Python violurus L. 



Club- shaped ,14-16^ long. Anterior extremity rounded, 3-1 5 yi/ 

 broad. Posterior extremity attenuated and recurved. Cytoplasm 

 more or less granular. Nucleus median or nearer posterior ex- 

 tremity, large, oval, and with coarse, deeply staining chromatin 

 granules. Parasite lies parallel or obliquely to long axis of host- 

 cell, of which it occupies about two-thirds, without causing much 

 alteration beyond displacement of nucleus. 



* [The complete account of the new species described in this communication 

 appears here ; but since the names and preliminary diagnoses were published in the 

 ' Abstract,' the species are distinguished by the name being underlined. — Editoe.] 



