No.412]] MWORTH-AMERICAN INVERTEBRATES. 313 
Gonosome: Medusz borne on branched peduncles, arising just above 
the proximal tentacles, ovoid hemispherical, with single large and usually 
three rudimentary tentacles. 
Hydroid bright pink in color, meduse light yellowish, manubrium, 
tentacles, and bulbs pinkish. 
Habitat: Sandy bottom in rather deep waters at 
various points in Vineyard Sound, Muskegat Chan- 
nel, etc. 
9. TUBULARIDA. 
Hydrocaulus with definite perisarc, simple or ir- 
regularly branched. Hydranths flask-shaped, with 
proximal and distal whorls of filiform tentacles. 
Gonophores in form of fixed sporosacs, borne on 
branched peduncles. 
Tubularia. 
Generic description as given for family. The 
following species are given: 
Tubularia couthouyi Ag. 
(Cont. Nat. Hist. U. S., vol. iv.) 
Trophosome: Stems unbranched, attaining a height 
: Fic. ro. — 
of from four to six inches. Hydranths large, often ndula 
be 
expanding an inch or more in diameter, with proximal (Modified from ‘Aman ) 
whorl of thirty to forty filiform tentacles and a distal one of much smaller. 
Gonosome : Gonophores as numerous, densely crowded racemes of 
: pendulous sporosacs. Larva escaping as actinule. Hydranth and gonads 
Habitat: On sandy bottoms dredged off Nobska Point, Vineyard 
Sound, and other similar places in the same locality. 
Tubularia larynx Elis and Solander. 
Trophosome: Stems clustered, more or less branched, annulated. Height 
One to two inches. Stem forming a collar-like expansion just below 
hydranth, ds latter bearing sixteen to twenty proximal filiform tentacles 
and a distal whorl of about the same number. 
Gonosome: Gonads in pendulous clusters, similar to last. Color of 
hydranth and gonads rosy. Perisarc yellowish. 
Tubularia spectabilis Ag. 
(Thamnocnidia spectabilis Ag., Cont. Nat. Hist. U. S.) 
Trophosome : Colony irregularly branched and sparsely annulated. 
Height three to four inches. Hydranths much as in former. 
Gonosome: Comparable with former. 
