CUSPIDELLA PEDUXCULATA. 13 



the orifice is turned quite downwards by a curving of this part of the 

 hydrotheca. In many of the hydrothecao annular indications of growth 

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

 in length to that of the hydrothecae which they support. 



The pinnae of one side are not given off irom the middle point of the 

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

 one of these than to the other. 



The species is probably correctly referred to the genus Tjafoea, 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. Hydrotheco3 borne on the summit of peduncles which aie 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 hydrothecae in every case pass gradually into the supporting pedun- 

 cle without any basal diaphragm. 



Genus CUSPIDELLA* Hincks. 



Cuspidella pedunculata. 

 PI VIII. Figs. 5, 6. 

 Trophosome. — Hydrosoma very minute. Ilydrothecne springing by 



* The genus Cuspidella was instituted by Hincks for certain minute opertMi'.ate Campanularinip which 

 he separated from Calycella {Campanularia sijrinijia of autlioi-s) on tlie ground of the sessile condition 



