244 NATURAL HISTORY OF 



Flustra Dumerilii [Audouin), M. Flemingii (Busk), 

 M. Pouilletii {Aid., Bush, McA.). 



Hab. : As last, species. Also Isle of Man, Ilfracombe, 

 Cornwall {Hindis). 



This species is allied to the preceding, but is more 

 delicate in texture, and has a small avicularium and 

 strongly granulated ovicels. The zooecia bear 4 — 6 

 spines. 



15. M. SOLIDULA, Alder and Hincks. 



Hab.: Guernsey {T. H.), Hastings {Miss Jelly). 



This species has small oval cells, with beaded margins 

 and small globular prominences between the cells, each 

 o£ which has four spines on its upper margin. 



Described in the Proceedings of the Dublin Univ. 

 Zool. and Botan. Association, ii., part i. 75. 



16. M. AUEiTA, Hincks. 



Hab. : Cornwall and Devon {T.H.), Northumberland 

 (Aid.). 



Described by Mr. Hincks in the Annals of Nat. Hist., 

 ser. 4, XX. 213. 



This species is distinguished by the regular quin- 

 cuncial arrangement of the zooecia, which are ovate, 

 with plain margins. It greatly resembles M. Flemingii. 

 The adult cells are armed with one long spine at the 

 side, and two raised avicularia. 



17. M. iMBELLis, Hincks. 



Hab. : Scotland, West Coast, Brixham (jP. E.). 



This species has large " pyriform " cells without 

 spines or avicularia, and is considered by Mr. Busk as 

 '^an unarmed variety of M. Flemingii ;'' but Mr. 

 Hincks considers it a separate species. The margins 

 of the zooecia are incurved and granulated. It is found 

 at a depth of 40 — 60 fathoms. 



