CYLICHNA. 319 



Cylichna elegant ANG., P. Z. S. 1877, p. 175, 189, pi. 26, f. 19. 



More ovate than others of the genus ; beautifully transversely 

 crenulately sculptured (Any.). 



C. PYGM^A A. Adams. PL 59, fig. 9. 



Shell small, subcylindrical, contracted in the middle, apex um- 

 bilicated, white, shining, smooth, longitudinally striated ; outer lip 

 posteriorly produced, rounded, inflexed in the middle ; inner lip 

 anteriorly subcallous ; aperture narrow, linear, anteriorly dilated 



Port Lincoln (Mus. Metcalfe) ; St. Vincent's Gulf (Tate) ; Sea of 

 Japan (A. Ad.). 



B. (Cylichna} pygmcea A. ADAMS, Thes. ii, p. 595, pi. 125, f. 150. 

 TATE, Trans, and Proc. and Rep. Philos. Soc. Adelaide, S. Austr. 

 1878-9, p. 138.Haminea pygmcea A. AD., Ann. Mag. N. H. (3), 

 ix, p. 155. 



C. ORDINARIA E. A. Smith. PL 27, fig. 90. 



Shell cylindrical, white, shining, imperforate, the excavation at 

 the apex scarcely profound, encircled by an impressed carina ; 

 aperture very narrow, dilated below, subtruncate ; columella some- 

 what twisted, excavated, surrounded by a keel. Alt. 7, diam. 3 

 mill. (Sm.) 



S. lat. 34 13', E. Ion. 151 38', of Sydney, N. S. Wales, 410 fins. 



Cylichna ordinaria SM., P. Z. S. 1891, p. 442, pi. 35, f. 21. 



The distinguishing character of this species is the excavation of 

 the lower part of the columella, which is circumscribed by a keel, a 

 continuation of the inner lip ($w.). 



C. STRTATA Hutton. PL 59, figs. 11, 12. 



Shell cylindrical, with slightly convex outlines; showing some 

 unevenly spaced growth lines, and an excessively fine spiral stria- 

 tion, which is coarser at the crown, and becomes coarser and spaced 

 toward the base. Vertex abruptly truncated ; the whorl rounded 

 above, passing into a funnel-shaped apical umbilicus, the edge of 

 which is defined by a sort of keel or ledge ; the perforation narrow 

 and deep. Aperture narrow in its upper two-thirds, dilated below ; 

 outer lip rising above the vertex, nearly rectilinear in the middle, 

 or even slightly incurved, rounded below ; columella sloping, rather 



