Zoological Society. 309 



Principally distinguished by the position of the vertex, which is 

 more posterior than in any other species ; the wrinkled sculpturing 

 upon the outer surface is also a well-defined peculiarity. 



Parmophorus intermedius. Parm. testa ovatd, elcvatiusctdd, 

 antice attenuatd ; extiis radiis asperrimis, quasi serratis, ornutd ; 

 vert ice prominulo, incurvo ; margine crenulato. Reeve, Conch. 

 Syst., vol. ii. pi. 139. fig. 5 and 6. 

 Hab. ad insulam Bohol, Philippinarum. 

 Long. I ; lat. | poll. 



This beautiful little shell, which may be considered as intermediate 

 in its generic characters between the Pariiwphori and the Emargi- 

 nulce, is most elegantly radiated on the outer surface, and the only 

 species of this genus at present known that is serrated at the margin. 

 Emarginula coNOiDEA. Einurg. testa conoided, albicante, extas 

 striis numerosis creherrime radiatd ; vertice centruli, ucuto ; mar- 

 gine valde crenato, sinu marginali profundc inciso. Keeve, 

 Conch. Syst., vol. ii. pi. 140. fig. 7. 



Hab. ? 



Long. ^ ; lat. | ; alt. •§ poll. 



A very characteristic shell, in the collection of William Walton, 

 Esq. 



Calyptr^a cinerea. Cal. testa suborbiculari, cxtiis a vertice ra- 

 diatd, radiis spinis parvis numerosis irregulariter ornatis ; intiis 

 cinereo nitente, cijatho magno, albo, subpellucido, lateraliter Jlex- 

 uoso. Reeve, Conch. Syst., vol. ii. jil. 144. fig. 4. 

 Hab. Cape Horn. 

 Diam, If; alt. 1 poll. 



An immense number of these shells, just brought to England, were 

 found attached to a single log of wood floating off Cape Horn. The 

 interior is lined with a very dark, ashy, highly i)olislied enamel, but 

 the cup is of a pure transparent white, offering a remarkably rich 

 contrast of colour. The exterior of the shell is irregularly covered 

 with numerous small spines, becoming, as in most of the CahjptracE. 

 obsolete with age. 



April 26. — William Horton Lloyd, Esq., in the Chair, 

 The following " Description of a new Dorsibranchiate Gasteropod, 

 discovered at Madeira," by the Ptev. R. T. Lowe, was read. 



Class MOLLUSCA. 

 Ord. Gasteropoda. 

 Fam. NuDiBRANCHi^ {Les Tritoniens, Lam.). 

 Gen. Peplidia. 

 Char. Gen. — Corpus limaciforme, repens, oblongum ; postice com- 

 presso-triquetrum, dorso abrupte (^ntia ScyUced) cristatum s. alato- 

 carinatum ; apice attenuato, acuto. Captit antic^ (ut in Thethye, L.) 

 veliferum ; velo semicirculari, margine fimbriato-lacero, ciliolato : 

 ore inter labia buccalia subtiis, simplici. Tentacula (ut in Doride) 

 duo, Orijicium generationis ad colli dextrum. Branchice diplo- 



