340 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Tubularia crocea (Ag.). Fig. 19. 
( Parypha crocea Ag., Cont. Nat. Hist. U. S., vol. iv, r>. 249.) 
Trophosome . — Colony growing in dense tufts of steins entangled below and separated int :> long 
pedicels above, attaining a height of 3 to 4 inches. Stems unbranched or sparsely branched, annulated 
slightly at intervals and swollen just below the hydranth. Hydranth with a body whorl of about 
20 to 24 tentacles and about the same number in the distal set. 
Gonosome.— Gonophores growing in racemes or clusters. Sessile medusae with a group of about 
four tentacular processes at its oral end, those of the female being laterally compressed. There are no 
evident radiating canals. 
Color.— Body of hydranths and gonophores rose red. Stems pale, almost white. 
Distribution. — F ound growing very profusely on the piles of the Fish Commission dock at Woods 
Hole; also on the piles of the docks at New Haven and other similar places. 
19. Tubularia crocea (Ag.). A. Cluster of gonophores. 20. Hypolytus per'egrinus Murb. (After Murbach.) 
This species is exceedingly difficult to distinguish from T. spectqjhilis. Indeed, little confidence 
can be placed in identification of specimens without mature female gonophores. 
HYPOLYTUS. 
Trophosome . — Colony consisting of single hydranths with a long proboscis and a distal and proxi- 
mal whorl of filiform tentacles. The proximal end of the stem is free. 
Gonosome . — Gonophores borne on the proboscis immediately above the proximal whorl of tentacles. 
They occur singly and not in clusters in the type specimen. The sessile medusae are long and terete 
in form and show no tentacular processes. 
Hypolytus peregrinus Murbach. Fig. 20. 
(Quart. Journ. Mic. Sci., vol. 42, part 3, p. 341.) 
The generic description above is sufficient to identify the one known species of the genus. 
Description condensed from original. The figure has been copied from that of Dr. Murbach, with 
his permission. 
Distribution . — Woods Hole, Mass. 
