DIAPHANA. 283 



level with the tip, retreats above and below, and is rouudly prom- 

 inent in the middle, where it slightly bends inwards, elsewhere it is 

 patulous ; its sweep is very regular throughout. Inner lip roundly 

 curved on the body, rather deeply concave at the top of the pillar, 

 along W'hich it runs nearly straight; a broad pad with defined edge 

 spreads across the body, and is pretty broad and reverted on the 

 pillar with a very slight twist on its front edge and a minute umbil- 

 ical chink behind ; the lip is not emarginate in front. 



Length 0"15 diam. O'l. Greatest breadth of mouth in front, 0'05 

 inch. ( Wats.). 



OfPerna7nhico,250ims.; West of Azores, 1000 fms. (Watson). 

 Middle Pliocene of Calabria (Seguenza). 



Bnllina undata Chiaje, Seguenza, Form. Terz. Calabria, p. 251, 

 pi. 16, f. 9 (Not of Chiaje). — Amphisphyra seguenzK Watson, 

 Chall. Gastr., p. 641, pi. 48, f. 5. 



D. MiNUTA Brown. PI. 26, figs. 70, 71. 



Shell very thin and fragile, hyaline, cylindric-ovate, dilated in the 

 middle, the base obliquely rounded ; vertex narrower, truncated and 

 depressed, spirally involute. Whorls 3-4, separated by a distinctly 

 impressed suture. Aperture shorter than the last whorl, quite 

 ample below ; outer lip flexuous, obtusely rounded at the upper 

 angle, slightly inflexed above the middle, roundly expanded beneath ; 

 columella short, slightly flexuous; umbilicus narrow, chink-shaped. 



Alt. 5 mill. {Sars.). 



Scandinavia and British Is., soidh to Kiel Bay ; Ocean coast of 

 France ; Madeira and Canary Is. ; Palermo ; Naples. 



Bulla hyalina Turton, Mag. Nat. Hist, vii, p. 353. Not Bulla hya- 

 lina Gmel. — Amphisphyra hyalina LovEX, Ind. Moll. Skand. Meyer 

 & Mobius, Fauna Kieler Bucht i, p. 67, f 8, 9 (shell). — Forbes & 

 Hanley, Hist. Brit. ]\[oll. iii, p. 521, pi. 114D, f 1, 2 (shell) and 

 pi. UU, f 2 (animal). — Monts., Journ. de Conch. 1874, p. 280. — 

 LocARD Coq. Mar. Fr. p. 29, f. 15. — XJtricuhis hyalinus Jeffr., 

 Brit. Conch, iv, p. 428 ; v, pi. 94, f 7 ; Ann. Mag. N. H. (4), xix, 

 p. 335. — Diaphana hyalina Sars, Moll. Reg. Arct. Norv., p. 289, 

 pi. 18, f. 1 (shell); pi. xi, f, 10 (dentition). — Utriculus mimdus 

 Brown, 111. Conch. G. B., (edit, 1844), p. 58, pi. 19, f. 7, 8 (very 

 young shell). — U. pellucidus Brown, t. c, p. 59, pi. 19, f. 10, 11. — 

 Sow'B., Conch. Icon, xviii, fig. 1. — U. Candidas Brown, t. c, p. 59, 



