362 _ Prof. Allman on the Construction and 
Eudendridz, 
1. Evpenprivum, Ehrenberg (in part). 
Trophosome.—Ccenosare consisting of a well-developed branch- 
ing hydrocaulus, rooted by a creeping filiform hydrorhiza, the 
whole invested by a chitinous periderm. Polypites developed 
from the summits of the branches, vasiform or oval, with the 
metastome contracted at ifs proximal and expanded at its distal 
extremity so as to be more or less trumpet-shaped ; tentacles 
filiform, in a single verticil just behind the metastome. 
Gonosome.—Gonophores adelocodonic, developed from the 
body of the polypite at the proximal side of the tentacles, or 
from the hydrocaulus *; female sporosacs monothalamic; male 
sporosacs polythalamic, 
Eudendrium ramosum, Linn. (sp.), = Tubularia ramosa, Linn., 
= Small ramified tubular Coralline, Elis, = Tubularia trichoides, 
Pallas, =? Sertularia racemosa, Cavolini, = Eudendrium ramosum, 
Ehrenb. 
Eudendrium rameum, Pallas (sp.),= Tubularia ramea, Pallas, = 
Eudendrium rameum, Johust. 
Eudendrium capillare, Alder,=Corymbogonium capillare, Allm. 
Eudendrium arbuscula, Wright. 
Eudendrium insigne, Hincks. 
Eudendrium humile, Allm, 
Eudendrium dispar, Agass. 
Eudendrium annulatum, Norman. 
Eudendrium cingulatum+, Stimpson. 
Eudendrium vaginatum, Allm. 
Eudendrium pusillum, Sars. 
2. Arracty.is, Strethill Wright (in part). 
Trophosome.—Ccenosare consisting of a hydrocaulus in the 
form of simple funnel-shaped stems, which are developed at 
intervals from a creeping filiform hydrorhiza, the whole invested 
by a cchitinous periderm. Polypites emerging from the summits 
of the hydrocaulus, into which they are retractile, fusiform, with 
filiform tentacula placed in a single verticil round the base of a 
conical metastome. 
Gonosome.—Gonophores adelocodonic, carried on the sides of — 
the hydrocaulus. 
* The polypite occasionally, from the exhaustion consequent on the 
growth of the gonophores, becomes arrested, loses its tentacles, and is — 
converted into a false gonoblastidium. 
+ Stimpson’s short description of this species (Marine Invertebrata of 
Grand Manan), unaccompanied as it is by a figure, is hardly sufficient for — 
a satisfactory diagnosis. 
