280 Rev. T. Hincks on new Hydroida and 



It seems probable that this is the second species referred 

 to by G. 0. Sars, and that Prof. Verrill is right in regarding 

 it as the genuine Lucernaria phrygia of Fabricius. Provi- 

 sionally, at least, it may bear his specific name. 



Subkingdom MOLLUSOA. 



Class POLYZOA. 



Group a. Entopeocta. 



Order GYMNOL£)MATA. 



Suborder Cheilostomata. 



Phylactella, Hincks. 



Phylactella (?) grandis, n. sp. (PI. XV. figs. 4, 5.) 



Zoarium incrusting ; zooecia very large, suberect towards 

 the oral extremity, below depressed, usually much expanded 

 below, above narrowed off into a neck ; walls thick, surface 

 minutely and densely granular, a row of pores round the 

 margin and across the front of the cells, a little above the 

 base ; orifice (adult) much contracted, elongated transversely, 

 very narrow between the upper and lower margins (trans- 

 versely semielliptical) , primary orifice semicircular; oral spines 

 four. Oo3cium elongated, narrowed towards the opening, much 

 thrown back, a spine visible on each side in front of it. 



This fine species is referred provisionally to the genus Phy- 

 lactella. The peristome is much raised round the sides and 

 front, forming a very narrow secondary orifice ; the upper 

 margin is not elevated. The cells are highly calcified, and 

 the walls remarkably thick and solid. 



MUCEONELLA, Hincks. 

 Mucronella simplex, n. sp. (PI. XV. fig. 7.) 



Zoarium incrusting ; zooecia quincuncially arranged, large, 

 ovate, distinct ; surface moderately convex, slightly roughened, 

 covered with small punctures ; orifice ample, quadrato-orbicu- 

 lar ; peristome raised all round, slightly bent outwards in front, 

 the lower margin rising in the centre into a prominent point or 

 knob. Ocecium large, rounded, somewhat roughened, and 

 punctate, the peristome carried up on it at eacli side. 



A pretty species, in which the generic character is repre- 

 sented in its simplest form ; the oral denticle is wanting. 



