214 ZOOPHYTOLfMJY. 



clear. In some instances it woirid appear to be perforated in 

 front, as if for an avicnlarinm, but in others it is smooth and 

 entire. 



Sub-ord. Cyclostomata. 

 Fan. Idmotieidee, Bk. 

 Gen. Puslulopora, Blainv. 



1. Puslulopora Orradensis, n. sp, PI. XXIX, figs. 1, 2. 



P. polyzoario irregulariter ramoso ; celhdis numerosis, nndequaque sur- 

 gentibus. 



Polyzoarium irregularly .branched; cells numerous, arising irregularly on 

 all sides. 



Bab. Shetland, Barlee. 



As this form is clearly neither P. proboscidea of Forbes, 

 which, in fact, from the specimen so named in the British 

 Museum, would seem to be not a Pustulopora at all, but a 

 variety of Cellepora ramulosa, nor the P. deflexa of Mr. 

 Couch, which appears to have a simple embranched polyzoary, 

 I am induced to erect it into a distinct species. But since 

 the species of this genus are as yet but little known, and 

 very difficult to distinguish, except from numerous speci- 

 mens, I am not sure it may not be identical with a Pus- 

 tulopora which occurs in the Atlantic and in the Australian 

 seas. 



