No. 412.] MORTH-AMERICAN INVERTEBRATES. 309 
Liudendrium ramosum inn. 
Trophosome: Colony arborescent, much branched, attaining a height of 
from four to six inches. Branches rather symmetrical, pinnate and some- 
what alternate, with similar sub-branches. Hydranths somewhat ovoid, 
with trumpet-shaped hypostome, and with 
single verticil of about twenty tentacles, 
some of which are often atrophied in male. 
Gonosome: Sexes distinct, though often 
growing in approximate colonies. Gono- 
phores of female somewhat pyriform and 
scattered, springing from body of hydranth 
or occasionally directly from stem. Male 
gonophores spring from base of hydranth 
close beneath the tentacles in moniliform 
clusters, each from three to four chambered. 
Color of male reddish, of 
female orange. Abundant 
on piles of docks, on racks, 
etc., in shallower waters. 
Eiudendrium dispar Ag. 
(Cont. Nat. Hist. U.S., vol. iv.) 
Trophosome : Colony large, 
from three to five inches in 
Fie. 5. : 
o 
Eudendrium ramosum Linn. Bera, stems more slender 
(After Allman.) than in former, somewhat 
Fic. 5. — Colony. fascicled, extensively and 
Fic. 6. — Hydranth with gonophores. variously branched and an- 
nulated. Hydranths vasiform, with about twenty-eight tentacles. 
Gonosome: Sexes distinct. Gonophores of female of pinkish orange 
hue, variously clustered about the base of the more or less atrophied 
hydranth and from distal portion of stem. Habitat in deeper waters in 
Vineyard Sound, attached to rocks, shells, etc. 
Ludendrium tenue A. Ag. 
(Vo. Am. Acalephe, p. 160.) 
Trophosome: Colony very small, rarely exceeding an inch in height, 
branching irregularly, hydranths vasiform, borne on slender pedicels. 
Gonosome: Male gonophores from two to four chambered, of pinkish 
color, clustered from bases of tentacles. Female gonophores bright orange 
in color, scattered over the branches and stem. Habitat on seaweed, etc., 
in shallower waters. Not abundant. 
