30 Rev. T. Hincks on the 



Celleporaj ? sp. 



Zoarium incrusting, of a rather dark brown colour. Zooecia 

 (towards the centre of the colony) erect, crowded, barrel- 

 shaped, some elevated, some immersed ; surface smooth, more 

 or less punctured round the margin ; orifice arched above, 

 lower margin slightly curved outwards (suborbicular), and 

 having in the centre a small notch, rounded below and con- 

 tracted at the opening by two minute denticular projections ; 

 operculum arched above, straight and entire below ; peristome 

 raised in front, embracing a short and stout rostrum, placed 

 immediately below the oral notch, and beai'ing an avicula- 

 rium on one side close to the top, with rounded mandible 

 directed upwards ; two very tall articulated marginal spines, 

 placed one on each side of the orifice above. Large avicularia 

 scattered amongst the cells with a broad subspatulate man- 

 dible, the beak elevated at the extremity into a hood-like 

 projection, not denticulate. Ocscium (?). 



Incrusting Retepora and shells. 



I cannot identify this form with any of the described species 

 known to me ; but I am by no means prepared at present to 

 say that it is new to science. It does not appear (so far as I 

 can judge in the absence of the figures) to be included amongst 

 the ' Challenger ' Celleporce characterized by Busk (Journ. 

 Linn. Soc. vol. xv. 1881, p. 341, &c.). If it should prove to 

 be (as I suspect) undescribed, I should propose for it the name 

 of Cellepora brunnea. 



Additional. 



Family Porinidae. 



Lagenipoea, Hincks. 



This genus, as originally constituted *, was formed for a 

 Porinidan species in which the cells are more or less im- 

 mersed in a calcareous crust. But I am now convinced that 

 this character cannot properly be made the foundation of a 

 generic group, and I propose to apply the name to such forms 

 as possess a lageniform cell with a free orbicular orifice and 

 are destitute of a special pore. The original type of the genus, 

 L. socialis mihi, will hold a place in the reconstituted group, 

 along with Phylactella lucida mihi, a Madeiran species (see 



* ' Annals ' for September 1877 ; ' Hist. Brit. Marine Polyzoa,' vol. i. 

 p. 236. 



