CUSPIDELLA PEDUNCULATA. 13 
the orifice is turned quite downwards by a curving of this part of the. 
hydrotheca. In many of the hydrothece annular indications of growth 
show themselves just behind the orifice. The peduncles are nearly equal 
in length to that of the hydrothece which they support. 
The pinne of one side are not given off from the middle point of the 
interval between two pinne of the opposite side, but rather nearer to 
one of these than to the other. 
The species is probably correctly referred to the genus Lafoéa, but in 
the absence of all knowledge of the hydranths this determination must be 
taken as only provisional. 
Lafoéa coalescens. 
Pl X 
Trophosome. — Hydrocaulus attaining a height of about half an inch, alter- 
nately branched, fascicled below, springing from a network of tubular fila- 
ments. Hydrothece borne on the summit of peduncles which are for the 
most part given off from the sides of a common tube to which they become 
immediately adnate until within a short distance of their extremities. Hy- 
drothece very deep, tubular, tapering towards the base, and again slightly 
narrowing towards the margin, which is itself slightly everted. 
Gonosome not known. 
Dredged south of Marquesas from a depth of 140 fathoms. 
The adnate condition of the hydrothecal peduncles gives to this elegant 
little hydroid a remarkable character. This must, however, be regarded as 
a continuation of the fascicled state of the lower part of the stem. Occa- 
sionally hydrothecx occur which are borne on shorter peduncles springing 
from the main stem, but free in their entire course, while there are also 
some which are borne on free peduncles springing from the hydrorhiza. 
The hydrothece in every case pass gradually into the supporting pedun- 
cle without any basal diaphragm. 
Genus CUSPIDELLA* Hinckxs. 
Cuspidella pedunculata. 
Pl. VIL. Figs. 5, 6. 
Trophosome. — Hydrosoma very minute. Hydrothece springing by 
* The genus Cuspidella was instituted by Hincks for certain minute operculate Campanularine which 
he separated from Calycella (Campanularia syringia of authors) on the ground of the sessile condition 
