224 Dr Fantham, Sarcocystis coli, n. sp., a Sarcosporidian, etc. 
of a capsulogenous nucleus can be distinguished. A few well- ; 
stained specimens have shown portions of probable polar filaments. — 
The commencement of protrusion of a filament has been followed. 
The polar capsule is seen as a vacuole in preparations stained — 
intra vitam. Some spores show a curious sinuous line which might, 
perhaps, be compared with the sutural line of a Myxosporidian 
spore. Such a sinuous line is not to be confused with longitudinal 
division, which has been clearly followed in numerous, broad, bean- | 
shaped spores. It should be mentioned that the spores show no ~ 
marked metachromatic granules, nor have they the complicated 
structure described by Crawley for S. rileyz from the duck (see 
Fantham and Porter, 1912), 
On account of the polymorphism and somewhat small size of 
the spores, the lack of marked metachromatic granules, and the 
1 
; 
: 
presence of a definite polar vesicle, I propose the new specific — 
name coli for this example of the genus Sarcocystis. Perhaps 
in the future, when our knowledge of the Sarcosporidia is more 
complete, it may be found advisable to place S. colw in an older | 
species, but at present it certainly possesses several clear, distin- 
guishing features. 
REFERENCES. 
Crawtey, H. (1911). “Observations on Sarcocystis rileyr (Stiles).” 
Proc. Acad. Nat. Sci., Philadelphia, Vol. txiu, pp. 497—468, 
1 plate. 
Fantuam, H. B. and Porter, Awnntz (1912). ‘The Structure and 
Homology of the Microsporidian Spore, as seen in Vosema apis.” 
Proc, Camb. Philosoph. Soc., Vol. xvi, pp. 580—583. 
Stiues, C. W. (1893). ‘On the Presence of Sarcosporidia in Birds.” 
Bulletin 3, Bureau of Animal Industry, U.S. Dept. Agric. 
EXPLANATION OF PLATE V. 
Dorsal aspect of Colius erythromelon, showing the distribution of trophozoites — 
of Sarcocystis coliit. Approximately natural size. 
