137 



ON THREE NEW SHELLS FROM THE COLLECTION OF 

 MR. B. C. THOMAS, OF BREST. 



By G. B. SowERBY, F.L.S., F.Z.S. 



Read \Zth November, 1S96. 



PLATE XI. 



The collection of very choice shells formed by Mr. Thomas, in 

 the course of many years and from many localities, contained 

 numerous types described and figured in the Journal de Conchylio- 

 logie from 1861 to 1878, besides two figured and described by 

 the writer in the Proceedings of the Zoological Society for 1881. 

 Most of these types have recently been purchased for the National 

 Collection. 



I have now the pleasure of describing a Loforium of somewhat 

 remarkable character, also a Pecten and a Cardkim new to science. 

 Unfortunately Mr. Thomas neglected to preserve the records of 

 the localities whence many of his shells were procured, although 

 he found a considerable proportion himself, particularly at Tahiti 

 and among the Marquesas Islands, so that only with regard to the 

 Cardium can the habitat be relied upon. The Lotoriurn is probably 

 from the same source ; but Mr. Thomas could give me no information 

 as to the locality of the Pecten. 



LoTORnjM ^ ARMATUM, n.sp. PI. XI, Pig. 1. 



Testa late-fusiformis, crassa, rugosa, rufo-fusca ; spira pyi'amidata, 

 subgradata ; anf ractus 6, primi rotunde convexi, spiraliter obsolete 

 striati, sequentes angulati, longitudinaliter irregulariter et sparsim 

 ( plicati, undique spiraliter sulcati, liris spiralibus 2-3 elevatis valde 

 tuberculosis instructi, penultimus bivaricosus, varicibus crassis, acute 

 tuberculatis, ultimus obtuse angulatus, valde et irregulariter tuber- 

 culatus et liratus, varicibus duobus crassis, latiusculis, tuberculis 

 productis subspiniformibus armatus ; rostrum breve, leviter coutortum, 

 lira crassa obliqua rugosa iustructum ; apertura ovata ; labrura 

 crassum, intus aurantium, duplicatum, tuberculis irregularibus denti- 

 formibus munitum ; columella nigro-fusco strigata, dense rugoso- 

 plicata. Long. 70mm. ; diam. maj. 42, min. 34 mm. 



Hah. — Marquesas Is. ? 



This remarkable shell bears no very close resemblance to any 

 hitherto known species. In form it is somewhat like L. cutaceum, 



{ 



' Loforium, Montf., 1810, is prior to Lampiisia, Schumacher, 1817, whilst 

 Triton, Montf., and Tritoniiim, Link, are preoccupied. 



VOL. II. — APRIL, 1897. 10 



