a General History of the Marine Polyzoa. 151 



Flustra spinosa of Quoy & Gaimard ; and from the figure which 

 he gives it would seem to be the same as the M. ciliata 

 of MacGillivray, an Australian species. If he is correct in 

 his identification, the latter name must give place to that of 

 Quoy and Gaimard. 



The species has occurred in the following localities : — Ker- 

 guelen Island [Mr. Eaton) ; Australia {MacGillivray) ; Ara- 

 bian Sea, between Bombay and Aden, lat. about 15° N., long, 

 about 65° E. {W. Gates). 



Another Memhranijyora sirinosa has been described by 

 D'Orbigny (Voy. dans I'Amdr. Merid. vol. v. 4^ partie), 

 wdiich bears a close resemblance to M. spinifera^ Johnston, 

 but is apparently destitute of avicularia. It is furnished with 

 about 10 spines on each side of the cell. 



Memhranipora permiinita^ n. sp. 

 (PI. X. fig. 2.) 



Zocecia arched above, expanding very slightly towards the 

 centre, and then narrowing ofi'more or less to the base, which 

 is subtruncate ; area occupying the whole of the front of the 

 cell, the lower two thirds filled in by a strong, thickly- 

 granulated, calcareous lamina ; ape tare arched above, lower 

 margin straight, higher than broad, margin scarcely elevated, 

 very finely beaded ; scattered amongst the zooecia elongate, 

 narrow-oval cells, the lower part of which is occupied by an 

 avicitlarium, depressed at the base, the beak much raised, 

 turned obliquely to one side, somewhat curved and pointed ; 

 mandible slender, edged on each side by a horny expansion ; 

 upper portion of avicularian cell hollow and open. Goscia 

 rounded, closely united to the lamina of the cell above, with a 

 raised rib round the front, inclosing a minutely granulated 

 space. 



Lac. Off" Curtis Island, Bass's Straits, common on shell 

 {CajJt. W. H. Caivne Warren). 



This species occurs in a very interesting collection of 

 Polyzoa made by Capt. Warren, of the ship ' Bedfordshire,' 

 and presented by him to the Liverpool Free Museum. The 

 committee of the Museum, at the instance of its very able 

 and energetic curator, Mr. Moore, have entrusted the collec- 

 tion to me for examination ; and I hope to describe and 

 figure a number of new forms from it in subsequent papers. 



M. permunita is interesting as being one of the few recent 

 species belonging to the present section of the genus which 

 are furnished with an avicularium of the elongate type placed 

 on a well-developed cell-area. A very similar appendage 



