83 Mr. G. Busk on three new species of Polyzoa. 



Dr. Hooker's collection. Aud it should be remembered that the 

 figure (pi. 19) in Ellis's ' Coi'allines ' was taken from a specimen 

 sent to his friend Mr. Peter CoUiuson from America. I would 

 further advert to the circumstance, that from one of the localities 

 enumerated by Dr. Johnston as affording C. neritina, viz. Co- 

 pinstra, I have, thi'ough the kindness of Lieut. W. L. Thomas, 

 received specimens of Mr. Peach's species, but none of the true 

 C. neritina of Ellis and Lamouroux. It may also be noticed, that 

 although Dr. Johnston's figure and references, as well as the 

 authentic specimen in the British Museum, are plainly assignable 

 to one and the same form, viz. to that figured in Ellis's ' Coral- 

 lines,' pi. 19, and to that only, yet the description in ' British 

 Zoophytes ' (vol. i. p. 340) is not exactly applicable to that form, 

 but more correctly so to Mr. Peach's. 



As it is evident the name C. neritina must be retained for the 

 form hitherto understood under it, the new species, now for the 

 first time distinguished from it, will demand a distinctive appel- 

 lation. Perhaps no better can be found than in the name of the 

 worthy and zealous observer, to whose discrimination the British 

 fauna may in fact be considered as indebted for this addition. 



In the present not very satisfactory state of nomenclature with 

 respect to the various species of Cellularia, I have thought it 

 better to retain that more general term than to adopt any of the 

 divisional ones more recently employed. 



Genus Cellularia, Pallas. 



Sp. Cellularia Peackii (Busk). 



Cellularia neritina, var. Johnston. 



Buffula neritina, var. Gray, List of British Radiata, p. 114. 



C. cellulis subelongatis, deorsum attenuatis, supra truncatis, sub- 

 rotundatis, spinam parvulum erectam externe gerentibus; 

 postice foraminibus 3-5 seriatim dispositis, perforatis. Ore 

 ovali regulari amplo, margine subincrassata minute verrucosa. 

 Ovariis rotundatis superficie tessellatis. 



Hab. Boddom, Buchanness; Peterhead, Tynemouth, Copinstra. 



Mr. Peach remarks that the species is bushy, erect, attached 

 to stones, old shells, and to other zoophytes from deep water, 

 brought up by the fisherman's lines off Peterhead, &c., and that 

 it is not plentiful. According to the British Museum list it also 

 occurs at Tynemouth ; and I have received it from Copinstra by 

 Lieut. W. ii. Thomas, R.N. 



It is white and of a delicate shining aspect when dry j the 

 branches long, slender and straggling. The inferior end of the 

 cell as seen behind much contracted ; the mouth regularly oval and 



