CAMPOLuEMUS. 365 



yet the teeth are of Pupillid type, and it is believed that 

 Nesopupa turtoni is perhaps the most nearly related of known 

 species. Several other Pupillid groups, such as Boysia aiul 

 Hypselostoma have the last whorl turned upward. 



1. CAMPOLAEMUS PEREXILIS (Smith). PL 33, figs. 13, 16-19. 



' ' Shell dextral or sinistral, minute, obtusely pyramidal, im- 

 perf orate, whitish or pale tawny. Whorls 5, somewhat con- 

 vex, slowly increasing, striate with delicate lines of growth, 

 the last whorl strongly ascending in front, constricted behind 

 the lip, furrowed and distorted, also furrowed basally, ap- 

 pressed to the preceding whorl. Spire very obtuse at apex. 

 Aperture transversely ovate, having a nearly circular sinus 

 above, narrowed within ; peristorne continuous, more or less 

 expanded. 



"Length 1.5, greatest diam. 1.5, least 1 mm.; aperture 0.5 

 mm. long and wide" (Smith). 



Length 1.55, diain. 1.4 mm.; 5 whorls. 



St. Helena : Side Path, and the sinistral form from Sugar- 

 loaf Ridge; extinct (Capt. Turton). 



TomigerusC*) perexttis E. A. SMITH, Proc. Zool. Soc., 

 1892, p. 267, pi. 22, f. 19-196. 



This shell is remarkable for the upwardly inclined aper- 

 ture and distorted last whorl, with a long basal suture, as in 

 the South American genus Tomigerus. 



The first li/o whorls are smooth and unusually wide; 

 penult and antepenult whorls have unevenly spaced but 

 rather strong, quite oblique stria? ; on the last whorl these are 

 much weaker. The emerging angular lamella converges 

 towards the upper palatal fold, forming a shortly oval, nearly 

 tubular sinulus. It penetrates deeply, as far as the anterior 

 end of the parietal lamella. The latter is deeply immersed, 

 its forward end visible in a front view, deep within ; becom- 

 ing a high lamella, it penetrates to the dorsal side. An infra- 

 parietal lamella, more deeply placed, not visible in the aper- 

 ture, penetrates about as far as the parietal. The anterior 

 end of the columellar lamella is visible in an oblique view in 

 the aperture. It also becomes high and penetrates to the 



