682 
viduals, in the anterior sixth, in those under 400 u, in the anterior 
third; tapering very gradually posterior to the region of maximum width, 
and abruptly squared at the end. 
Nucleus about two-thirds as large as the endocyte of the proto- 
merite, obscured in all large living individuals and barely visible in small 
living specimens; easily demonstrated with Potassium Iodid Iodine 
solution and apparent in all cleared specimens. 
Epicyte thin and very flexible; of uniform thickness over the entire 
animal except in the anterior portion of the protomerite where it is 
much thickened to form the walls of the base of the papilla and very 
thin over the anterior end of the papilla; showing distinct longitudinal 
striations by oblique light in living or cleared specimens. 
Sarcocyte very thin near the middle of the deutomerite, becoming 
thicker both anteriorly and posteriorly, thickest in the region of the 
septum and quite thick in the median anterior portion of the protomerite 
just behind the papilla, where it fills a slight depression in the endocyte 
in specimens in which the papilla is not expanded. 
Endocyte of the protomerite pale gray and rather opaque, filling 
the protomerite quite completely except in the median anterior portion; 
anterior margin convex when the papilla is extended and somewhat 
concave away from the papilla, when the papilla is not extended; poste- 
rior margin feebly convex towards the deutomerite. Endocyte of the 
deutomerite dark lead gray to almost black, dense and opaque. 
The specimens of this gregarine observed were not very active but 
were capable of bending in any direction as they moved. After bending 
about for a few seconds they suddenly resumed their normal form. They 
were never seen to become short and thick as has been observed in the 
case of Stenophora juli (Frantz). 
This species may be distinguished from Stenophora larvata (Leidy) 
Stenophora jul (Frantz), and Stenophora elongata sp. nov., by the fol- 
lowing table. The measurements are for full size specimens. 
; Protomerite 
; Posterior : à 
Deutomerite Mars; in Special 
a Body Length 
è Elongate to Proportions of 
NEUEN Flask-shaped See it | Deutomerite | 
S. juli e ‘0 | Pointed 10-17 | Changeable | 
S. cockerellae AES Very 14—17 Expansible Papilla 
: Elongate Square P 
Always 3 Pentagonal 
S. elongata Elongate Square 18—26 Proton ere 
