508 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
The transverse vessels of the sac, as woukl be expected in such large 
and evidently old individuals, are rather irregular. Five appears to 
be the number of those of the first order. In the ventral part of the 
sac some of those of the second order become nearly as stout, and 
assume the character of vessels of the first order. Transverse vessels 
of a third, fourth, and (in some places) fifth order are developed only 
on the folds, and separate the small infundibula which are developed 
along the summit of each fold. These small infundibula may be 
regarded as the cones formed by the forking (two or more times) 
of the large infundibula occupying the spaces between the larger 
transverse vessels, but these large infundibula are in this species only 
poorly marked, and are indicated chiefly by the more or less concen- 
tric arrangement of the stigmata. 
Stigmata small, very short and very numerous. They do not form 
regular rows but between the folds are nevertheless mostly longitudi- 
nally, and on the basal portion of the folds more or less concentrically 
arranged, so as to indicate, as just mentioned, large infundibula. 
On the upper part of the folds they are quite irregular, becoming more 
or less spiral in the small infundibula on the summit, and forming 
other spirals, usually irregular and imperfect, on the sides of the folds. 
IMany of the stigmata are so small and short as to be merely oval 
openings. Next to the endostyle there is an irregular row of imperfect 
infundibula with irregularly spiral stigmata. The wall of the sac, 
especially in the dorsal part is strengthened by irregular branching 
vessels lying upon its inner surface, and crossing, usually without in- 
terrupting, the stigmata which lie in their path. 
Stomach wall with rather numerous irregular glandular folds. In- 
testinal loop open (but not very widely) for a considerable distance 
from its reflected end; the whole loop is bent in fairly regular curve as 
in C. mcmhattcnsis, though not so much as in that species. Margin of 
the anus sinuate and slightly flared. 
Kidney large, wide, sausage-shaped and slightly curved; placed 
against the body wall of the posterior ventral part of the right side 
in an oblique position with the posterior end more dorsal. 
Gonads very large in both the specimens, the ovaries being particu- 
larly well developed and containing a great number of small eggs. 
There is a hermaphroditic gonad in the usual position on each side 
of the body; on the left side in the concavity dorsal to the intestinal 
loop, on the right dorsal and somewhat anterior to the kidney. The 
