HELIX. 93 



The last feature mentioned corresponds to the similar but less de- 

 veloped sinuosity of the upper lip in the two species of Thersites, 

 and also to that shown by various forms of Papuina. 



In having the spiral sculpture continued to the very apex, Ano- 

 glypta is unique ; almost all other Helices having the nucleus smooth 

 or differently sculptured from the rest of the whorls. 



H. LAUNCESTONEXSIS Keeve. PI. 20, figs. 37, 38, 39. 



Shell depressed, conoid, umbilicated, acutely carinated, lusterless 

 and prominently tuberculate-lirate above, polished and banded be- 

 low the carina. 



The color above is light olive-green, the spiral beaded ribs being 

 brown ; beneath it is polished chocolate colored (sometimes somewhat 

 suffused with yellowish and having scattered yellow dots), and about 

 midway between periphery and umbilicus there is a broad, sharply 

 defined yellow zone. The surface above is dull, sculptured with 

 4 to 6 principal spiral beaded or tuberculate spiral cords, and nu- 

 merous smaller threads between them. Spire conoidal, apex obtuse ; 

 sutures scarcely impressed. Whorls 5 J, nearly flat, the last acutely 

 keeled, very abruptly and deeply deflexed at the aperture. Aper- 

 ture subhorizontal, irregularly oval ; peristome simple, not expanded, 

 the upper margin sinuous and projecting downward just above the 

 periphery ; baso-columellar margin somewhat thickened. Umbili- 

 cus deep, funnel-shaped, with a more or less obvious spiral groove 

 inside. Alt. 19-20, diam. 30-32 mill. 



Tasmania. 



H. Launcestonensis REEVE, Proc. Zool. Soc. 1852, p. 31, t. 13, f. 

 11 ; Conch. Icon., f. 968. PER. Monographia iii, p. 159 ; Conchyl. 

 Cab., p. 491, 1. 161, f. 1, 2. Cox, Monog. Austr. Land Shells, p. 31, 

 t. 7, f. 4. 



A species so peculiar in sculpture that it is approached by no 

 other form. The H. semicarinata Ancey does not belong near laun- 

 cestonensis, but in Nanina, sect. Rotula (see Le Naturaliste iii, p. 

 293). 



Most specimens show short folds just below the suture, and some- 

 times these are continued as far as the periphery, making the sur- 

 face radiately corrugated. 



Supersectiou II. HADE A Albers. 



The shells of this great branch differ from the species of Camcena 

 in having the nucleus small, the point of its junction with the after- 



