588 THE AMERICAN NATURALIST. [VOL. XXXV, 
Euchetlota ventricularis McCr. 
Bell of medusa hemispherical; radial canals four, wide and with the 
gonads extending their entire length; marginal tentacles twelve to twenty 
in mature specimens, only four at liberation of medusa; manubrium short, 
tubular, of yellowish color with reddish central portion; gonads similar in 
color; otocysts eight, with lithocysts arranged in an arc. Hydroid (?). 
Eu. duodecimalis A, Ag. (FIG. 52). 
Medusa similar to preceding species, but with twelve otocysts and with 
only four long tentacles, each with a pair of lateral cirri atthe base; gonads 
borne on distal half of radial canals. Hydroid (?). 
Clytia bicophora Ag. (FIG. 53). 
Medusa variable in appearance with age; when first liberated, the bell is 
rather globular, later becoming flattened and finally at maturity being hemi- 
spherical; diameter about five mm,; radial canals four, beneath which the 
gonads, which are dull brown in color, extend from 
base of the short manubrium about to their middle 
portion; marginal tentacles eight, with intermediate 
tentacular buds; otocysts eight. Hydroid, — /ézd. 
—~— 
Fic. 52. 
Fic. 54. 
Fic. 52. — Luchetlota duodecimalis A. Ag. (After A. Agassiz.) 
Fic. 53. — Clytia bicophora Ag. (After A. Agassiz.) 
Fic. 54. — Tima formosa Ag. (After A. Agassiz.) 
C. nolliformis McCr. 
Medusa much as in preceding; marginal tentacles four in young speci- 
mens, increasing in number with age; otocysts eight, between bases of 
tentacles; manubrium short and with four oral lobes. Hydroid (?). 
Tima formosa Ag. (FIG. 54). 
Medusa bell-shaped or elongate hemispherical; marginal tentacles 
numerous, long, filamentous, and with bulbous bases; radial canals four, 
and with convoluted, pouch-like gonads extending their entire length ; 
