BY F. JEFFREY BELL, M.A., SEC. R.M.S. 505 



Mr. Ridley tells me that there are representatives of three 

 Polyzoan genera here present — Allopora, Lepralia, (S. Str. ) and 

 Betepora. 



Salmacis alexandri. — In the Proc. Zool. Soc, London, for the 

 year 1880, I have (p. 433) pointed out that the S. globator of 

 Agassiz is not the S- globator of Agassiz jil. ; the former that I 

 there distinguished and figured as form B., is, no doubt, the true 

 S. globator. The other and much more common species must have 

 a new name, and in my forthcoming report on the Echinoidea of 

 H.M.S. Alert, I propose to speak of it as S. alexandri. 



Salmacis bicolor. — The abactinal spines of this species may be 

 unicolor. 



Amblypneustes, sp. — As specimens of this genus are beginning 

 to accumulate, fresh doubts and difficulties arise as to the specific 

 characters of the forms belonging to it ; and I must take this 

 opportunity to ask my friends in Australia, " the hot-bed of 

 the genus," to let me have a large number of specimens from 

 various localities and in all kinds of stages. I may, at this time, 

 beg of those into whose hands fresh specimens may come to 

 attempt to set at rest the difficulties whish are connected with the 

 differences in the size of the genital pores in specimens of A. 

 griseus and A. formosus. Have we here different species, different 

 races, or different sexes ?* 



Strongylocentrotus erythrogrammus. — Mr. Woods is both his- 

 torically and etymologically wrong in writing the specific name 

 erythrogrammus. 



Laganum peronii. — Mr. Woods writes (Op. cit. II. p. 170) 

 " Genus, Peronella, Gray, 1855 ; as he gives no inference I may 

 assume that he refers to Dr. J. E. Gray's catalogue of the recent 

 Echinida published in 1855 ; but, further, in giving no reference 

 he gives no page, and I cannot, therefore, guess where to look for 

 Dr. Gray's definition of the genus. It is not, at any rate, 

 mentioned in the " Synopsis of Genera," on p. 3. 



* Cf. P. Z. S., 1880, pp. 436-7, and pi. XLI„ fig. 3-6. 



