506 MR. A. ADAMS ON NEW MOLLTJSCA. [NoV. 24, 



although a naturalist for whom I entertain the highest respect con- 

 siders it to be the Scirpearia mirabilis of Cuvier. There is, how- 

 ever, so much doubt as to what the coral so named by the illustrious 

 Frenchman really is, that I hesitate to ascribe mine to that species, 

 the more especially as it clearly falls within the definition of the 

 genus JunceUa (as it appears in the ' Histoire Naturelle des Coral- 

 liaires ' of Milne-Edwards, vol. i. p. 186), forming a member of the 

 section of Gorgonellacece which is made up of Gorgoniad corals 

 having a smooth bark and a sublithoid axis containing so much car- 

 bonate of lime as to effervesce in muriatic acid. From JunceUa 

 juncea, Esper, and /. vimea, Val. (species found at the island of 

 Bourbon), it would seem to be distinguished by the large size of the 

 cup-bearing papillae ; from J. elongata, a Mediterranean species, by 

 its being simple, not branched. J. hystrix, J. surculus, and J. ca- 

 liculata appear to be names without descriptions. 



As to the difficulty of identifying Scirpearia, the following passage 

 from M. Milne-Edwards' s work, already referred to, may be quoted :. — 



" The Alcyonarian described and figured by Linnaeus under the 

 name of Pennahda mirabilis seems to be very little connected with 

 Firgularia inirabilis as some have suggested. It has a slender stem, 

 attenuated at the two extremities, and bearing at each side a simple 

 series of widely separated polypes. Cuvier formed of it the genus 

 Scirpearia, which has been adopted by Ehrenberg. Lamarck placed 

 it in his genus Funiculina, near Pavonaria, under the name of F. 

 cylindrica. Fleming thought that the species was not distinct from 

 Firgularia ; and Blainville affirmed that it was nothing but a Gor- 

 gonia. None of these opinions seem to me admissible. It is too 

 imperfectly known to have a place assigned to it in a scientific clas- 

 sification of corals." — Hist. Nat. Corall. i. p. 214. 



6. Description of a New Genus and of Twelve New 

 Species of Mollusca. By Arthur Adams, F.L.S., etc. 



Genus Eutrochus, A. Ad. 



Testa trochiformis, tenuis, perspective umbilicata ; anfractihus 

 planis, transversim liratis. Apertura subquadrata, intus mar- 

 garitacea, labia rectiusculo, margine acuto, subrejlexo, antice 

 in dentem obtusum desinente. 



A form of TrochidcB most nearly resembling a Ziziphinus with a 

 perspective umbilicus similar to that of Architectonica. 



1. Eutrochus perspectivus, A. Ad. 



E. testa depresso-conoidea, late et profunde umbilicata, pallida 

 carnicolore, Julvo sparsim maculata et flammulis fulvicantibus 

 picta ; anfractibus 7, planis, transversim valde liratis, litiis in- 

 eequalibus subdistantibus, ad suturas angulatis, anfractu ultimo 

 ad periomphalum granulosa ; apertura intus sulcata. 



Alt. 1 inch, lat. \^ in. 



Hab. Tasmania {Coll, Cuming.). 



