CUSPIDELLA PEDUNCULATE. 13 



the orifice is tui-ned quite downwards by a curving of this part of the 

 hydrotheca. In many of the hydrothecoo annular indications of growth 

 show themselves just behind the orifice. The peduncles are nearly equal 

 in length to that of the hydrotheca3 which they support. 



The pinnie of one side are not given off from the middle point of the 

 interval between two pinnas of the opposite side, but rather nearer to 

 one of these than to the other. 



The species is probably correctly referred to the genus Lafoea, but in 

 the absence of all knowledge of the hydranths this determination must be 

 taken as only provisional. 



Lafoea coalescens. 



PI. X. 



Trophosome. — Hydrocaulus attaining a height of about half an inch, alter- 

 nately branched, fascicled below, springing from a network of tubular fila- 

 ments. Hydrothecfe 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- 

 drothecae 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 hydrothecae 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 hydrothecoe in every case pass gradually into the supporting pedun- 

 cle without any basal diaphragm. 



Genus CUSPIDELLA* Hincks. 



Cuspidella pedunculata. 

 PL VIII. Figs. 5, 6. 

 Trophosome. — Hydrosoma very minute. Hydrothecae springing by 



* The genus Cuspidella was instituted by Hincks for certain minute operculate Campanularlna; which 

 he separated from Calycella {Cumpanularia syrinyia of authors) on the ground of the sessile condition 



