282 Rev. T. Hincks on new Hydroida and 



it may bear the generic name to which it would be entitled 

 under the older systems, and which merely indicates its erect 

 and ramose habit. 



Family Celleporidae. 



Cellepoka, Fabricus. 



Gellepora , ? n. sp. 



Zooscia suberect, urceolate, often obscurely furrowed or 

 striated radiately in front, ventricose below ; orifice orbicular, 

 with a slight sinus in the inferior margin (produced below) ; 

 peristome somewhat raised, and in front (in adult cells) carried 

 up into a very prominent mucro, bearing on the summit a 

 small subcircular avicularium. 



Colony consisting of a small cluster of cells. 



Probably this form should rank as a distinct species, though 

 in some respects it bears a resemblance to G. armata, mihi. 

 From the latter it is distinguished by the striated surface, the 

 round avicularium, and the total absence, in the specimens 

 which I have examined, of the spatulate avicularia, which 

 constitute so conspicuous a feature of C. armata. The latter 

 character, I am well aware, does not count for much ; there 

 is, however, a certain dissimilarity in general appearance 

 between the two forms, which leads me to suspect that they 

 may prove to be distinct*. If so, the Barents-Sea species 

 may be distinguished as G. striatula. 



Note on Flustra solida, Stimpson (Flustramorpha, Gray, 

 Verrill). 



(PL XV. figs. 2, 3.) 



This species is better known as the Eschara palmata, Sars, 

 which, according to Verrillf, is identical with the Flustra 

 solida of Stimpson. A difficult question arises as to its 

 systematic position, and Stimpson's generic name is only re- 

 tained provisionally. 



A striking character is the presence of numerous tubular 

 fibres, which pass downward from various points on both the 

 surfaces of the zoarium, uniting below to form a kind of stem, 

 and finally giving off a multitude of fibrils, which serve as a 



* I have only examined one or two small specimens of the present 

 form. 



f " Notice of recent Additions to the Marine Invertebrata of the North- 

 eastern Coast of America," &c, Proc. of United-States National Museum, 

 Nov. 5, 1879, fig. 165. 



