MARINE POLYZOA. 39 



Caberea zelanica, Busk, Voy. of Rattlesn. i. 378. 



Hab. Cumberland Island. New Zealand, Hooker ; E. Falkland 



Islands ; S. Patagonia, 49 S. ; Port St. Julian, Patagonia ; 



Strait of Magellan, Darwin ; Coast of Devon, Miss Cutler. 



Algoa Bay. 



This appears to be one of the most generally diffused species, 

 and it varies also considerably in some respects, according to its 

 age and other circumstances, perhaps of depth or temperature, 

 &c. To observe the specific characters here assigned, it is ne- 

 cessary to examine the younger or more perfect cells at the 

 extremity of the branches, the older ones by continued depo- 

 sition of calcareous matter being considerably altered, and 

 also usually deprived of the spines. But the most remarkable 

 difference is in the conformation of the pedunculate operculum. 

 As shown in PL XVI. fig. 4, this process extends quite across the 

 aperture of the cell, forming a sort of bridge, from the lower 

 margin of which depends the expanded lamina, and this appears 

 to be the condition in which it was figured by Savigny ; whilst in 

 PL XXXVIII. figs. 2, 6, 7, it will be seen that the operculum is not 

 connected with the opposite side of the aperture, but of the more 

 usual form. Upon sufficient examination however it will be 

 found that both forms run insensibly into each other. The recent 

 discovery of this species on the coast of Devonshire is of great 

 interest. It there grows in minute tufts upon Eschar a foliacea, 

 and has probably hitherto been overlooked, owing to its resem- 

 blance to Canda reptans. 



j3. Inoperculatee. A r o pedunculate operculum. 



3. CABEREA HOOKERI. PL XXXVII. fig. 2. 



Bi-triserial. Marginal cells with two marginal spines above 

 and one on the inner side. Central cells with a marginal spine 

 on each side of the aperture above. Setae serrated. 



Cellularia Hookeri, Flem. Brit.Anim. 539 (1828) ; Johnst. Hist. 



Brit. Zooph. ed. 2. 338. t. 60. f. 1, 2. 

 Bicellaria Hookeri, Blainv. Diet. Sc. Nat. Ix. 424. 

 Hab. Torquay, Hooker ; Orkneys, E. F. Barlee. 



?4. CABEREA LATA. Pl.XLVII. 



Bi-multiserial ; marginal cells with a single subapical spine ; 

 central cells without marginal spines ; seta? serrated. 



Caberea lata, Busk, op. cit. i. 378. 



Hab. Australia ; New Zealand (an praeced. varietas ?). 



