Vou. 2] Torrey—Hydroids of the San Diego Region. 19 
This species is named for Miss Margaret Henderson as a slight 
mark of appreciation of her efficient assistance in the prepara- 
tion of this paper. 
23. Clytia universitatis, n. sp. 
Campanularia denticulata, Torrey, 1902, p. 51, pl. 4, fig. 34. 
Trophosome. Stem long, branching irregularly, forming bushy tufts 
often exceeding 200 mm. in length. Stem and branches polysiphonie. 
Hydranth pedicels long, almost completely annulated; hydrothecae deep, 
tapering, with 12-15 marginal teeth; hydranths with about 28 tentacles. 
Gonosome. Gonangia borne on stem, branches or hydranth pedicels, 
less than 3 times as long as broad, with short pedicel which may or may 
not contain a single annulus; with wide aperture. Contour somewhat irreg- 
war, occasionally 1 or 2 annulations distally. Medusae numerous, oldest 
with 4 tentacles. 
Dimensions. Hydrothecae, in mm.: .70x.37; .78x.40; .81x.39; 
83x42. Gonangium: .95x39; 1.00x.41. 
Fig. 12.—Clytia uni- Fig. 13.—C. univer- 
versitatis. Hydrotheea. sitatis. Gonangium. 
Distribution. San Diego Bay, on piles of wharves at low 
tide, July 15, 1904; San Pedro Bay, Cal., Dec., 1901. 
The species bears a general resemblance to Campanularia ver- 
ticillata. The pedicils of the hydranths, however, are not arranged 
in verticils, and the gonophores are not sporosaes. Young colo- 
nies taken in San Pedro Harbor, December, 1901, were previ- 
ously identified with ©. denticulata Clark, though certain differ- 
ences were noted and the immaturity of the colonies prevented 
an accurate determination. 
