DIAFIIANA-CYLICHNA. 287 



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

 14, diam. 7 mill. {Petterd). 



Near River Leven, Tasmania (Miss Lodder). 



Diaphanna ntrea Pet., Proc. Roy. Soc. Tasm., 1885, p. 321. 

 Section Austrodiaphana Pilsbry. 



Shell like Diaphana, but columella abruptly truncated below. 

 D. BRAziERi Angas. PI. 26, fig. 68. 



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

 line, covered with a fine membranaceous olive epidermis ; last 

 whorl inflated; spire flatly depressed; whorls 8*, rounded aliove, 

 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 IJ lines. (Arig.). 



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



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

 p. 189. 



Genus CYLICHNA Lovtn, 1847. 



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

 lina Fer., 1822. — Cylindrella Swains, Malacol., pp. 135, 326, type 

 C. alba Sw. Not CijUndrella Swains, /. c. p. 311, (s. g. for Comis 

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

 (lS'iO).— CijUchna Loven, Ofv. K. Yet. Akad. Forhandl., 1^46, p. 

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

 iv, p. 171, 1844 (Coleoptera). — BuUlnella R. B. Newton, Syst. List 

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

 Cryptaxis Jeffr., Ann. Mag. N. H., (5), xi, p. 400, 1883, type C. 

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

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



-\-Ci/licJtnel/a Gabb., and Mnedia H. & 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, smootli or with spiral strife; 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- 



