Pacific Salpidae — YoUNT 
291 
Fig. 8. Helkosalpa komaii. a. Solitary form, right side; b, solitary form, inside view of ventral cloacal region; 
Cy solitary form (230 mm.), right side (after Komai, 1932); d, solitary form, posterior part of gut, right side 
(blind sac 2 has been turned slightly dorsad); e, aggregate form (about 50 mm.), sinistral individual, right side; 
/, aggregate form (about 70 mm.), dextral individual, right side, {e and /after Komai, 1932). 
of M I, and as a ventral retractor which 
courses with M C as part of the ventral longi- 
tudinal muscle. Komai shows the dorsal re- 
tractor muscle formed only by ventral lip 
sphincters 1 and 2, the ventral retractor mus- 
cle formed by ventral lip sphincter 3. The 
specimen before me is rather mutilated an- 
teriorly, so my description perhaps is wrong 
in some details. M I-II continuing dorsally 
as unpaired dorsal longitudinal muscle join- 
ing x; X forming ventral longitudinal muscle 
(paired) which receives contributions from 
all body muscles as well as ventral retractor 
and M C of mouth region; there is thus a 
continuous rectangular muscle band which 
includes parts of all the major muscles of this 
animal. Ciliated groove, ganglion and eye: Cili- 
ated groove highly convoluted, located an- 
teriorly at level of M C; ganglion and eye at 
level of M I-II, just over rectum. Viscera: 
