278 ATYS. 



A. DiAPHANA Aradas. PI. 32, figs. 29, 30. 



Shell ovate, turgid, very shining, hyaline, smooth in the middle, 

 scul])tured with about 10 flexuous, concentric striw above and be- 

 low, becoming closer toward each end ; vertex subtruncate, umbili- 

 cate, thickened at the outer margin. Aperture coarctate in the 

 middle, patulous and angled above, canaliculate below ; columella 

 with one fold at base. Alt. nearly one-fifth, width one-tenth inch 



^gean Sea to Italy. 



Bulla diaphana Arad., Catal. Rag., etc., p. 40 (1840). — Phil., 

 Enum. Moll. Sicil. ii, p. 215. — Weinkaujfia diaphana Monts., 

 Nom. Gen. e Spec. p. 145. — Bulla turgidida Forbes, Rep. Aeg. In- 

 vert, p. 188, (1843). — Bidla semistriata Recj., Coq. de Corse, p. 42 

 (1848). — Scaphander gibhUus Jeffr., Ann. Mag. N. H. (2), xvii, 

 1856, p. 188, pi. 2, f. 20, 21.— Sowb., Conch. Icon, xviii, f. 8. 



According to Monterosato it varies in being more or less swollen. 



A. BLAiNviLLiANA Recluz. PI. 43, fig. 16. 



Sliell oblong, subcylindrical, umbilicated, shining, milk-white ; a 

 little convex in the middle, very smooth, striated at the ends, the 

 marginal striae deeper, the others sensibly smoother. Aperture ob- 

 long, wider at base ; columella obtusely one-toothed below. Alt. 10, 

 diam. 5? mill. (RecL). 



C'oafit of Provence and of Sicily (Reel.). 



Onda triticea Blainv., in Faune Francaise, ou Hist. Nat., Gen. 

 et Partic. des Anim. que se trouv. en France, INIoll., p. 251, pi. 9 A, 

 f. 4 (good) ; not of Lam, nor Payr. — Bulla hlainvilliana Recluz, 

 Rev. Zoologique la Soc. Cuvierienne, 1843, p. 10. — Cylichna klain- 

 villeana Reel., Locard, Coq. Mar. Fr., p. 27. — C. jeffreysi Locard, 

 Prodr., p. 75. 



The a})ex is umbilicated, the umbilicus being a millimetre in 

 width and rounded within ; the umbilicated end is a little more at- 

 tenuated than the base of the shell. This species is a real Bulla 

 and not an Ovula, always of a beautiful whiteness, not red-orange 

 (Reel). 



The description of this shell in Faune Francaise is partly hypo- 

 thetical, the author of that work being under the impression that 

 his t^liell was a dead specimen of a red Ovula, described and figured 

 by Payraudeau. Recluz has also given a very poor description 

 (translated above), but his citation of Blainville's figure as a good 



