338 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
attenuate and pendant. In place of the hydrorhiza the basal part of the pedicel is frayed out, as it 
were, into numerous hollow tubular processes. 
Gonosome. — Gonophores borne on branched peduncles inserted above the proximal row of 
tentacles. Medusae with 1 large tentacle and usually 3 much smaller ones. 
Color . — Hydranth body and gonophores bright pink. Medusa with light-yellow proboscis and 
pink tentacle bulbs. 
Distribution . — Sandy and muddy bottoms in rather deep water. The specimens in the U. S. Fish 
Commission collection at Woods Hole are not labeled, but are said to be from Smith Hole. 
TUBULARID/E. 
Trophosome. — Hydrocaulus with a distinct tubular perisarc, branched irregularly or not at all. 
Hydranths with a- proximal and distal set of filiform tentacles. An adherent, creeping hydrorhiza 
often produced. 
Gonosome. — Gonophores borne above the proximal whorl of tentacles on branched peduncles, and 
not producing free medusse. The females produce hydra-like actinules which develop directly into 
new colonies. 
Key to the genera of Tubularidse found in the Woods Hole region. 
Hydranths permanently attached by a regular hydrorhiza Tubularia. 
Hydranths not permanently fixed, the stem or pedicel giving off buds from its free end, which are 
separated by spontaneous fission and develop into new hydranths Hypolytus. 
TUBULARIA. 
Trophosome. — Colony branched or unbranched, attached by permanent chitinous hydrorhiza. 
Gonosome. — Gonophores borne in pendent clusters attached by peduncles to the hydranth body 
above the proximal tentacles. Female gonophores producing actinules. 
Key to the species of Tubularia found in the Woods Hole region. 
A. Sessile medusee with distinct radial canals T. couthouyi. 
A'. Sessile medusse without distinct radial canals and with conical apical processes. 
a. Coenosarc forming a distinct expansion in the stem just below the hydranth. Perisarc exten- 
sively annulated T. larynx. 
a'. Perisarc not extensively annulated. 
b. Hydranths large. Habitat, shallow water T. spedabilis. 
b'. Hydranths small. Habitat, deep water T. tenclla. 
A". Sessile medusse without distinct radial canals and with apical processes of females flattened. 
Hydranths large. Habitat, shallow water T. crocea. 
Tubularia couthouyi Ag. Fig. 16. 
(Cont. Nat. Hist. U. S.,IV, p.266.) 
Trophosome. — Stems unbranched, often annulated, attaining a height of 5 to 7 inches. Hydranth 
large, probably the largest on our coasts, often expanding an inch or more; proximal whorl of tentacles 
30 to 40 in number; distal set very much smaller and shorter. 
Gonosome. — Gonophores growing in dense racemes from the hydranth body just above proximal 
whorl of tentacles. Sessile medusse with 4 radial canals and without tentacular processes at the oral 
end. Females producing actinules. 
Color. — Stem and gonophores bright scarlet. 
Distribution . — Found in brackish water usually. A number of beautiful specimens were sent me 
by Dr. Mead, of Brown University, who had them growing in a submerged flatboat at Providence, 
R. I. A few specimens were taken from a depth of 30 fathoms bv the Fish Hawk in latitude 40° 49' 
45", longitude 70° 42'. Mr. George Gray reports them from Quick Hole and off Nobska Point. 
Tubularia larynx Ellis & Solander. Fig. 17. 
(Nat. Hist. Corallines, p. 30.) 
Trophosome. — Colony bushy; stems branched and extensively annulated, attaining a height of 1 
to 11 inches. Coenosarc of the stem forming a curious collar-like expansion below the hydranth. 
Hydranth with 16 to 20 proximal tentacles and about the same number in the distal set. 
