278 ATYS. 



A. DIAPHANA Aradas. PL 32, figs. 29, 30. 



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

 sculptured with about 10 flexuous, concentric stride 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 



JEgean Sea to Italy. 



Bulla diapliana ARAB., Catal. Rag., etc., p. 40 (1840). PHIL., 

 Enum. Moll. Sicil. ii, p. 215. Weinkauffia diapliana MONTS., 

 Nom. Gen. e Spec. p. 145. Bulla turgidula FORBES, Rep. Aeg. In- 

 vert. p. 188, (1843). Bulla semistriata REQ., Coq. de Corse, p. 42 

 (1848). Scaphander gibbulus 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. 



Shell 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. (Reel.'). 



Coast of Provence and of Sicily (Reel.). 



mla triticea BLAINV., in Faune Francaise, ou Hist. Nat., Gen. 

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

 f. 4 (good) ; not of Lam. nor Payr. Bulla blainvilliana RECLUZ, 

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

 villeana Reel., LOCARD, Coq. Mar. Fr., p. 27. C.jeffreysi LOCARD, 

 Proclr., p. 75. 



The apex 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 shell 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 



