58 University of California Publications. [| ZooLocy 
situated a little dorsal and to the right of the end of the endo- 
style; and the anus enters the atrium to the left of the endostyle. 
The esophagus is marked off from the stomach by being distinctly 
less in diameter than the stomach. At the anterior end of the 
intestine a cecum nearly as large as the intestine itself is given 
off, which curves backward and upward and forms a very con- 
spicuous object in all the stages of development observed, co., figs. 
7 and 8. 
From the posterior extremity of the intestinal bow a great 
finger-like outgrowth of the mantle extends backward and up- 
ward. This appendage is even longer and more conspicuous than 
the stomachal cecum described above. Into it extend prolonga- 
tions of the posterior branches of both dorsal and ventral body 
muscles ; and in addition it contains a well defined axial strand, 
the connections and nature of which are doubtful, p. d., figs. This 
appendage would seem to be comparable with the portion of the 
post-abdomen that extends beyond the intestinal loop in various 
compound ascidians. The axial strand is probably the testis, or 
a portion of it. The ovary is situated on the right side of the 
body at the extreme posterior end, midway between the atrial 
orifice and the esophagus; and the oviduct, which is unusually 
long, extends forward to a level with the third ventral muscle 
band. 
C. bakeri appears to have more in common with C. floridana, 
Apstein, than with any other known species. It is, however, 
very distinct from this latter, as is obvious from the following, 
among several other differences: The largest specimen of C. 
floridana seen by Apstein was 12 mm long. In view of the con- 
siderable number of specimens taken by the Plankton Expedi- 
tion, the great disparity in size thus indicated shows pretty con- 
clusively that C. bakeri is a much larger species than floridana. 
The lateral glandular organs of the solitary floridana are dis- 
tinctly less extensive than in bakeri, and are, according to Ap- 
stein’s statement, continuous on each side as in C. pinnata. The 
intestine of floridana has a single appendage, while that of bakeri 
has two. The closest resemblance between the two is in the mus- 
culatures of the solitary forms, but even here there are well 
marked differences, which, however, need not be dwelt upon, 
