210 LAFOEID^E. 



Hab. On tlie stems of zoophytes. Llandudno, North 

 Wales; Whitby; Shetland (T. H.) : Northumberland, 

 "on other zoophytes from deep water, occasionally "(J. A.). 



2. C. GRANDIS. 

 Plate XL. fig. 4. 



HYDROTHEC^E cylindrical, slender, much elongated, some- 

 times curved, with an operculum composed of fewer and 

 larger segments than in the last species ; GONOTHEC^E un- 

 known. 



Height of calycle about twice as great as in C. humilis. 



THIS species differs from the preceding chiefly in the pro- 

 portions of the hydrothecse, which are narrow and com- 

 paratively gigantic; those of C. humilis are dwarfish, 

 and broad in proportion to their height. In the present 

 species the Avidth is only about or ^ of the height ; in 

 the last it is about \ or ^ of it. There are also differences 

 between the two forms in the operculum. 



Hab. Birterbuy Bay, Connemara (G. S. Brady): Shet- 

 land (J. A.). 



3. C. COSTATA. 

 Plate XL. fig. 5. 



HYDROTHECLE somewhat broadly cylindrical, encircled by 

 two or three rather prominent ribs, or lines of growth, 

 dividing them into ser/ments, the uppermost or opercular 

 segment formed of thinner material than the rest, and 

 supporting a conical operculum, composed of very nu- 

 merous convergent pieces ; GONOTHEC^E unknown. 



THE calycle of C. costata is generally divided into three 

 segments, besides the uppermost. The latter is a delicate 



