46 University of California Publications. | [Zoorocy 
1. Euplokamis californensis, n. sp. 
Body moderately compressed, somewhat flattened at sensory pole, 
narrowed toward mouth. Tentacle sheaths about three fourths the 
length of the body, lying close to and parallel with the oesophageal canals, 
diverging slightly to openings near sensory pole. The four interradial 
canals arise independently from funnel. Distances from funnel to aboral 
and oral poles as 1 to 2. Tentacles yellow brown; inner opening of oesoph- 
agus purple. 
Distribution. San Diego, Cal. Taken at the surface and in 
vertical hauls from various depths to 125 fathoms with non- 
closing nets, during May, June and July. None were more than 
25 mm. long. This species is very closely related to E. cucumis, 
with which it may prove to be identical. It is near, also, to the 
Cydippe elliptica of Eschscholtz, from the tropical Pacifie. 
Pleurobrachia, Fleming, 1822. 
Body spherical, interradial canals from two stem canals. 
2. Pleurobrachia bachei A. Ag. 
Pleurobrachia bachei A. Ag., L. Agassiz, 1860, p. 294. 
A. Agassiz, 1865, p. 34. 
Oesophagus equal to or less than funnel tube in length; tentacle 
sheaths distant from funnel, about half as long as body, divergent, open- 
ings about one fourth the distance from pole to pole from sense organ; 
stems canals long, all canals slender. 
Remarkably transparent, and colorless with the exception of the 
tentacles, which are yellowish red, and the oesophagus, which is blotched 
with deep purple proximally. 
Distribution. San Diego to Puget Sound. This species 
differs from P. pileus (Fabr.) of the Atlantic, having a shorter 
oesophagus and longer funnel tube, and longer and more slen- 
der stem and interradial canals. The openings of the tentacle 
sacs are somewhat farther from the sensory pole. 
Ord. LOBATA. 
Body compressed, with two lateral lobes. Subtentacular rows of 
swimming plates shorter than others, with four auricular processes at their 
ends. Mouth large. Four interradial canals direct from the funnel. 
Tentacles rudimentary, near oral pole, without sheathes. A Mertensia 
stage in the development. 
