18 University of California Publications. | ZooLoGy 
22. Clytia hendersoni, n. sp. 
Trophosome. Colonies branching, 3 to 5 em. high. Internodes of 
the stem flexuous, with a pronounced knee at the base of each, and run- 
ning parallel with hydranth pedicels for nearly half their length; above 
each knee, 3 to 8 annulae. Pedicels completely annulated, with 6-14 annulae. 
Hydrothecae large, deep, 1.00-1.2 mm. long by .40.-.60 mm. in diameter, 
tapering gradually, with very thin and easily collapsible walls, bordered by 
about 14 very sharp, keeled teeth. 
Gonosome. Gonangia with wide mouths, widest in distal half, 
tapering, 3 times as long as broad, with wavy contours but not annulated. 
Pedicels short, with 3 or 4 annulae. Usually 3 or 4 medusae in each gonan- 
gium, each with 4 tentacles and without gonads. 
~<a 
= 
| 
Fig. 10.—Clytia hendersoni. Stem Fig. 11.—C. hendersoni. Stem 
with hydrothecae. with gonangia. 
Distribution. San Diego Bay, 3 fathoms, July 15, 1903. 
Growing rather thickly on sponges. The flexuous character of 
the stem is more pronounced distally. 
