THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTORY. 



[FIFTH SERIES.] 

 No. 52. APRIL 1882. 



XXV. — On certain Points in the Movpliology of tlie Blas- 

 toidea, with Descriptions of some new Genera and Species. 

 By R. Etheridge, Jun., and P. Herbert Carpenter, 

 M.A,, Assistant Master at Eton College. 



In the following pages we give some zoological descriptions 

 of certain new genera and species of Blastoids \vliich have 

 come under om' notice during the preparation of our joint 

 memoir on the group. We propose in this memoir to limit 

 our zoological work to the British species* only, though this 

 is l»y no means the case with our morphological researches. 

 These have led us to establish three new genera for some very 

 singular types, which are described in the following pages, as 

 they do not occur in this country. Their morphology will 

 be discussed in full in our larger work, with the aid of the 

 beautifid figures which are being prepared by our friends 

 Messrs. C. Berjeau and P. Highley. 



* A revision by competent liands of the American species of Blastoidea, 

 like that of tlie Pala3ocrinoidea wliicli is being so ably conducted by 

 Messrs. Wachsnmtli and Springer, is a very great desideratum. \\'e have 

 attempted in vain to ■\vork out the synonymy of many so-called species, 

 owing to the want uf material or of satisfactory descriptions and ligures. 

 The so-called Codu-itcr pnlcJielliis of Miller ^^.ud iJyer (.lourn. 'Jincinn. Sec. 

 Nat. Hist. 1878, i. p. oo) is a case in pi/Jbt. "'here is no mention of 

 hydrospiral slits in the specific diaiinosis ; noi are any shown in the figure ; 

 and we cannot help suspecting that this species represents a typo very 

 dift'erent from the original Cudaster of M'Co}-. 



Ann. & Mag. N. Hist. Ser. 5. Vol. ix. 10 



