16 Descriptions of Thirty Supposed New Species and 



SPIRAXIS CONTORTA. The only species of Spiraxis (Jam.) 

 which I do not know on direct information from the late Pro- 

 fessor C. B. ADAMS, is S. Anomalus^ (Bulimus Anomalus, 

 Cont. Conch, p. 28) and in his description of the only spe- 

 cimen before him, he seems to speak of a shell truncated^ as 

 though the genus Spiraxis were subject to truncation, 

 which, in a strict conchological sense, it certainly is not. 



I understand the term truncated to apply only to a Shell 

 whose apex is by nature subject to fall off ; the animal, by 

 its own inherent power, stopping up the aperture left by 

 such falling off in the truncated apex ; and not to an acci- 

 dental breaking of the shell. "What Bui. or Spiraxis ano- 

 malus really is, I do not know. The Shell I am about to 

 describe seems not to answer its description. 



Shell conic, elongate, white, with strong transverse broad 

 ribs, broader than the intervening spaces, much arcuated. 

 Spire not truncated, with rectilinear outlines. Apex very 

 small. Whorls 10, quite convex and with a deeply impressed 

 suture. Last whorl proportioned to the others, with a slight 

 constriction around the middle, which also modifies the 

 aperture. The aperture is rather longer than its breadth, 

 roundly acute above, and well rounded below : constricted 

 in the middle like the figure 8, (see Cont. Conch, p. 4 29.) 

 Labrum thin and sharp : on the right, at the constric- 

 tion, is that which resembles a tooth internally, and 

 approaches the singularly twisted end of the columella 

 on the left side, representing the figure 8. On the left the 

 labrum is reflected but not thickened. 



Mean divergence 1 5. Length .3, breadth .07, 



Length of aperture .05. 



Habitat, Manchester Back Mountains. 



PUPA JARDINEANA. Shell tapering, slightly fusiform, 

 much elongated, pure white, opaque, solid and rough. Spire 

 slender, with convex outlines. Apex sharp. Whorls about 6, 

 very convex, and very much shouldered, with a deeply im- 

 pressed suture. Aperture long and very slightly oblique. 



