62 University of California Publications. | ZOOLOGY 
the whorls united tangentially.- Body in general cylindrical, 
though somewhat arched dorsally, and tapering at the atrial end. 
Rather soft and of uniform consisteney, there being no thick- 
ened or specially stiffened areas in the test; the connecting 
peduncle and protruding intestinal tract forming very promi- 
nent projections from the ventral side. Full grown zooids from 
60 to 70 mm. long. Body usually quite transparent and without 
pigment, but occasionally traces of pink on surface of test about 
anterior end. Lips of branchial orifice prominent, of approxi- 
mately equal size; atrial orifice without lips. Body muscles five 
on the dorsal side and six on the ventral, all continuous across 
the dorsal side, and all except sixth interrupted by a narrow 
interval ventrally; the fifth and sixth ventral muscles joining 
laterally to form the fifth dorsal. The second band giving off a 
longitudinal muscle laterally, which extends forward to the angle 
of the branchial orifice; the fifth giving off a small branch on 
each side, which extends back close under the intestine; the 
sixth, with a branch on each side connecting with the first atrial. 
A well developed band in each lip of the branchial orifice meet- 
ing in a wide angle on each side. First atrial band nearly as 
broad as body bands; the other atrials, about eight in number, 
very delicate. Endostyle extending from slightly in front of the 
first body muscle to behind the fifth muscle, and quite to the 
intestine. Gill extending from somewhat in front of the second 
muscle fully to the intestine, hence terminating near the poste- 
rior end of the endostyle. Ganglion and sense organ under the 
second body muscle, and a little posterior to the anterior end of 
the gill. Hypophyseal mouth close in front of the anterior end 
of the gill, large and much convoluted, becoming rosette shaped, 
the band narrowly open to the right. The intestine projecting 
from the ventral side like a hernia; forming almost a circle of 
relatively large size, in full grown zooids 1.5 em. in diameter, 
the curve extending downward and forward, so that the anus 
is very near to, and to the left of, the esophageal mouth. Stom- 
ach scarcely larger in diameter than intestine, and not distinctly 
set off from it. Esophagus short and much smaller in diameter. 
Deep yellow, nearly uniform throughout. Heart conspicuous, 
immediately in front of intestinal ring on ventral side. Placenta 
A A a eS 
