THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTOEY. 



[SIXTH SERIES.] 

 No. 12. DECEMBER 1888. 



LVII. — Remarks upon a Species of Coccidiura infesting 

 Perichoeta. By FRANK E. Beduard, M.A., Prosector to 

 the Zoological Society of London, Lecturer on Biology at 

 Guy's Hospital. 



[Plate XV.] 



The notes which I publish in this paper are very incomplete, 

 inasmuch as they are the outcome of a study of spirit-preserved 

 material only. But as the material in question shows with 

 perfect clearness certain characteristic features in the struc- 

 ture and development of this Coccidium, and as it is not at all 

 likely that I shall have the opportunity of studying the living 

 worms which are the host of the Gregarine, 1 think it better 

 to publish such new facts as I have noted down. Moreover, 

 this is, I believe, the first record of the presence of Coccidia 

 in any Annelid, or at any rate in any earthworm ; and it is 

 always important to ascertain how far the range of certain 

 genera of Gregarines is limited to certain groups of animals 

 which are their hosts. 



In the account of the Gregarines by Prof. Blitschli, in vol. i. 

 ot Bronn's 'KlassenundOrdnungen desThierreichs,' a valuable 

 summary is given of the distribution of Gregarines ; it is tliere 



Ann. cf.' Muff. N. Hist. Ser. 6. Vol. ii. 31 



