Mr. Gray's Monograph on the Ct/praidcB. 367 



/S immacnlata. Testa iinmaculafS. alb^. 



Cypiiea Pediculus (Aiiglica). Linn, Syst. Nat. 1 180. 



Cypraea arctlca. Montagu, Test. Brit. iil. 20 1. 



1. Incompleta. Testi tenui, politi ; subliiieati, spiiii promiiiuli. 

 Cyprasa bullata. Montagu^ Test. Brit. iil. 101. 



Cypraja Europaea, Junior. Dilhci/7i, R.S. i. 467. 

 Icon. Montagu, Test. Brit. t. 6. f. 1. 



2. Junior. Testi tcr.uissima, polity, laevi ; labiis tenuibus. 

 Inhabits the European Ocean. Britain, Lister, Montagu, S^c, 

 Shell ovate, ventricose, solid, brown, polished ; back with three 



spots, one at each end, and one on the right side of the centre ; 

 the numerous longitudinal thread-like stria; are white, smooth, 

 scarcely interrupted in tlie middle of the back, and not forming 

 any impressed dorsal groove ; base rather convex ; mouth linear, 

 a little longer than the concealed spire, and slightly curved towards 

 it ; outer lip slightly thickened, rounded. Teeth of both lips 

 nearly equal, those of the outer minute, and very close together. 



Length ■^^, breadth ^^, of an inch. 



This shell may be at once distinguished from all the other 

 species, by its wanting the dorsal groove, and being usually marked 

 with three spots on the back, two of which are at each end, and 

 one on the right side of the centre. 



Col. Montagu, in his Supplement, has very properly united his 

 C. bullata to this species, being satisfied that it was only the shell 

 in its imperfect state, when it is smooth, pellucid, and according 

 to its age more or less distinctly marked with pale white longitu- 

 dinal stripes, commencing from the lips, and running more or less 

 completely over the back ; these stripes are the rudiments of the 

 longitudinal thread-like striae. 



When very young the shell is quite smooth, without any in- 

 flexed outer lip, and has a short distinct spire ; in this state it lias 

 been confounded by Dillwyn and other conchologists with the 

 Bulla diaphuna of Montagu, p. 225. t. 7. f. 8., which is the young 

 of Voluta lavis of Donovan, t. 165, (the Ctjprwa Volula of Mon- 

 tagu, Tcstacea Brit. p. 203. t. 6. f. 7.) and which forms, with a 

 few other undescribed species, a section of the genus Marginella 

 of Lamarck. 



