143 



Notes on South Australian Marine Mollusca, with 

 Descriptions of New Species. Part mi. 



By Jos. C. Verco, M.D. (Lond.), F.R.C.S. (Eng.), etc. 



[Read May 1, 1906.] 



Plate IV. 



Cingulina spina, Crosse and Insclie)-. 



Turritella spina, Crosse and Fischer, Jouni. de Conch. 1864, 

 p. 347; I860, p. 44, t. 3, figs. 12-14, type locality, St. Vincent 

 Gulf; Aclis tristriata, Ten. Woods, Proc. Roy. Soc. Tasni., 1877, 

 p. 150; type locality, N.W. Coast, Tasmania'; No. 220, Handlist 

 of Aquatic Moll, of S. Aust., Adcock, 1893. 



"Bhis species varies greatly. It may be very attenuate, or 

 comparatively wide; uniformly subulate or posteriorly spin- 

 dle-shaped; have valid or obsolete axial stri£Ej a smooth base, 

 or with numerous sublenticular spiral grooves, or tw^o slight 

 spiral undulations. The last whorl may be very ventricose. 

 A more or less valid lira may lie in the suture. The cinguli 

 are usually nearly equal, but the central one may be more 

 developed, and the suture be wide and deep and distinct. 



Cingfulina diaphana, i^pec. nov. PL iv., fig. 11. 



Shell thin, diajDhanous. Protoconch asymmetrical 

 smooth. Whorls exclusive of this six, medially carinate, 

 with seven valid spiral iirae, equally distant on the jDenulti- 

 mate, scabrous from microscopic accremental striae, obliquely 

 receding from the suture. Suture well marked, slightly 

 channelled. Body-whorl with a stouter lira at the periphery, 

 and a deeper sulcus below it, and seven basal lirse less valid 

 than those above, base sloping. Aperture fusiformly lozenge- 

 shaped, slightly contracted behind, and narrowly effuse in 

 front. Outer-lip simple. Columella slightly convex pos- 

 teriorly uniformly concave throughout the anterior three- 

 fourths; inner-lip complete. 



Length, 2'1 mm.; breadth, '7 mm.; aperture, *6 mm. 



Hab. — Henley Beach, one example in the late Prof. 

 Tate's collection, labelled "Mathilda jmf/odi/Ja." One other 

 specimen dredged in deep water St. Vincent Gulf. 



Scala aculeata, Sowerby, jun. 



Ficalaria aculeata, Sowerby, Proc. Zool. Soc. Lond., 1844, p. 



12; Thes. Conch., vol. i., p. 86, sp. 13, pi. xxxii.. figs. 35, 36, 37, 



1847; Tryon, Man. Conch., vol. ix., p. 63, pi. xiii., figs. 90, 91, 



1887; No. 192, Handhst of Aquatic Moll, of S. Aust., 1893: S. 



