HALIOTIS. 21 



(lecumbenti ; furaminibus tubiformibiis, mediocris ; apertiira 

 splendide viridi, purpureo luteoque iridescenti, labio interno 

 crasso. — The well-known large, oval, flat-ridged species with a 

 green and purple iridescence is easy to distinguish frona other 

 species. I have no doubt that Mr. Keeve's H. planilirata 

 was described from a specimen of the green variety in a 

 young state, of which the exact counterpart can be traced 

 towards the apex of some full-grown specimens. Fig. 105, 

 with somewhat more robust sculpture, and white spots in the 

 centre, is from specimens in the British jNIuseum. H. inter- 

 texta of Lischke I believe to be a variety half grown. 



13. RDGOSO-PLiCATA, f. 9, 10, 63, Chemnitz. — Testa 

 ovalis, oblonga, valde concava, arcuata, paliide fulva nonnun- 

 quam radiatim variegata, spiraliter tenuiter nodoso-lirata, 

 oblique radiatim regulariter rugata, foraminibus numerosis 

 prominentibus; area marginali tricostata; apertura argentea, 

 eleganter rugata. — Of an oval, arched and convex form, beau- 

 tifully wrinkled with spiral and radiating ridges crossing 

 each other obliquely. This sculpture is inversely shewn in 

 the interior. I was about to name Mr. Hanley's little shell 

 (fig. 53) as new, but found it to be a young specimen of the 

 present species. 



14. Cracherodii, f. 13, Leach. — Testa dense viridis 

 nigi-escens Isevis ovata, moderate convexa, crassiuscula, fora- 

 minibus distantibus, depressis; intus argentea. — A large 

 dark, green, smooth, oval shell, with few distant holes. 



15. CALiFORNiENSis, f. 14, Siuainsou. — Testa H. Cra- 

 cherodii similis sed magis convexa, foraminibus multo magis 

 numerosis et approximatis. — Like T. Cracherodii, but a much 

 more rounded and convex shell, with much more numerous 

 and approximate holes. 



16. GLABRA, f. 1, 2, Chemnitz. — Testa ovalis, depressa, 

 viridi-lutea, maculis fulvis acute angulatis variegata, laevigata 

 plus minusve leviter striata foraminibus parvis, spira fere 

 immersa subterminali ; intus argentea, labio interno angusto, 

 planulato. — The angular brown spots which variegate this 

 smooth oval shell are sometimes drawn out into elongated 

 points. 



Note. — Ziczac, Eeeve, described as being more deeply 

 striated than this species, cannot be distinguished in a number 



