DIAPHANA-CYLICHNA. 287 



with fine lines of growth ; aperture narrowly ovate, inflated. Alt. 

 14, diam. 7 mill. (Petterd). 



Near River Leven, Tasmania (Miss Lodder). 



Diaphanna niveaPET., Proc. Roy. Soc. Tasm., 1885, p. 321. 

 Section Austrodiaphana Pilsbry. 



Shell like Diaphana, but columella abruptly truncated below. 

 D. BRAZIERI Angas. PL 26, fig. 68. 



Shell subglobose, with a long, narrow open umbilicus, thin, hya- 

 line, covered with a fine membranaceous olive epidermis ; last 

 whorl inflated; spire flatly depressed; whorls 3*, rounded above, 

 suture impressed ; aperture contracted above, subovate below ; 

 outer lip sharply angled posteriorly, slightly sinuous, arcuate below; 

 columella abruptly truncate below the umbilicus. Length 2 lines, 

 breadth 1-J lines. (Any."). 



Sow and Pigs reef, Port Jackson, N. S. Wales, Australia, 4 fms. 



Diaphana brazieri ANG., P. Z. S., 1877, p. 175, pi. 26, f. 20 ; t. c. 

 p. 189. 



Genus CYLICHNA Loven, 1847. 



Bullina Risso, Hist. Nat. Eur. Merid., iv, p. 51, 1826. Not Bul- 

 lina Fer., l&22. 0ylindrella SWAINS, Malacol., pp. 135, 326, type 

 C. alba Sw. Not Cylindrella Swains, t. c. p. 311, (s. g. for Conus 

 asper Chem.), nor of Pfr., Wiegrn. Archiv f. Naturg., i, p. 38, 

 (1840). Cylichna LOVEN, Ofv. K. Vet. Akad. Forhandl., 1846, p. 

 142, 1847. Not Cylichnus Burmeister, Handb. der Entomologie, 

 iv, p. 171, 1844 (Co\eopterti).ullinella R. B. NEWTON, Syst. List 

 Edwards Coll. Brit. Oligocene and Eocene Moll., p. 265, 1891. 

 Oryptaxis JEFFR., Ann. Mag. N. H., (5), xi, p. 400, 1883, type (7. 

 parvula Jeffr. Not Cryptaxis Lowe (Helicidse). " Oliva, Klein " 

 H. & A. ADAMS, Gen. Rec. Moll., ii, p. 657. 



-\-Cylichnella GABB., and Mnestia H. <fe A. Adams. 



Shell rather small and subcylindrical, the spire sunken and um- 

 bilicate or closed and concealed by the calloused inner lip ; moder- 

 ately solid, smooth or with spiral stride ; aperture as long as the 

 shell, narrow above, somewhat dilated toward the base ; columella 

 rather thickened, simple or somewhat sinuous ; outer lip reced- 

 ing toward the suture. Type C. cylindracea. 



Animal (pi. 61, fig. 23, C. cylindracea') with long head disc, trun- 

 cated in front and behind. Mouth armed with a pair of jaws com- 



