NOT. ‘ TWO NEW GREGARINIDA. Vi 
On removing the gregarine from the host the epimerite is 
generally torn off, remaining behind fastened to the intestine. 
The filament being, so far as discovered, a simple structure 
unprovided with hooks, probably maintains its hold by a more 
or less sinuous course in the intestinal cells of the host. When 
the epimerite is not torn off, it invariably carries with it an 
irregular mass of protoplasm, part of the intestinal cell of the 
host in which it had anchored itself (Pl. III, pr’p/, Figs. 
44, 46). 
The conical base of the epimerite is apparently continuous 
with the contents of the anterior portion of the protomerite, 
for there is an orifice through the cuticular wall of the proto- 
merite, and the base of the epimerite is composed of protoplasm 
very similar to that of the protomerite. The orifice is made 
very distinct by a considerable thickening of the cuticula at its 
margin (Pl. III, Figs. 44, 46, fas). In the cases where the 
epimerite has been torn off, the cuticula immediately surround- 
ing the orifice appears pulled out a little by the strain of the 
rupture, thus leaving a cup-like depression at the anterior end 
of the protomerite (Pl. III, Fig. 48). Longitudinal sections 
through this cup show that the cuticular thickening just 
alluded to bends over its rim and extends about half-way down 
into the bowl (PI. III, Fig. 45, fas). Cross sections through 
this region in the case of individuals retaining the epimerite 
show a row of teeth-like processes (de) extending inwards from 
the margin of the cup (Pl. III, Fig. 47). These project radially 
toward the axis of the epimerite, — I think from the lowermost 
portion of the cuticular band which bounds the orifice, — and 
perhaps serve to hold the epimerite more securely to the 
protomerite. 
The parallel longitudinal ridges of the body wall of the 
gregarine, on reaching the protomerite, converge towards 
the cuticular ring surrounding the cup (PI. III, Fig. 47); they 
become narrower and lower as they approach the ring, until at 
length they are so minute that in sections cutting across them 
(Pl. III, Fig. 49, cvs) they resemble short cilia. The cuticular 
crests run up almost to the ring, where they terminate in a 
slight thickening (Pl. III, Fig. 48, cz/). 
