TORNATELLJNA. 177 



lively solid, corneous-brown, distinctly marked with growth- 

 wrinkles. Whorls 5%, strongly convex, but the last has a 

 wide contraction or impressed zone around the middle. The 

 base is very convex. The aperture is small, very oblique; 

 outer lip thin and simple. Columella is vertical, heavily cal- 

 loused above the middle, the callus sometimes very indistinctly 

 biplicate by reason of a slight median impression. A deep 

 groove runs above the callus around the insertion of the colu- 

 mella. The parietal lamella is strong and high, running in- 

 ward a half-whorl. Length 4.2, diam. 2 mm. ; length of aper- 

 ture 1.5 mm. (figs. 1, 2). 



The shells from Rarotonga are a little smaller, length 3.6, 

 diam. 1.8, aperture 1.25 mm., but they agree in the heavy colu- 

 mellar callus and other characters (fig. 3). 



T. pusilla is a larger, more solid, more robust shell than T. 

 i. normal-is. Specimens from Huaheine which we have re- 

 ferred to T. impressa Mouss., resemble T. pusilla rather 

 closely, hut they have not so heavily calloused a columella, 

 and are smaller. 



34. T. AFFINIS Garrett. 



"Shell small, imperf orate, ovate-conic, thin, smooth, shin- 

 ing, transparent, light brownish-horn color; spire oblong- 

 conic, with planulate outlines ; apex obtusely rounded ; suture 

 narrowly margined, whorls six, plano-convex, slowly and regu- 

 larly increasing, the last not deflected in front, rather large ; 

 aperture oblique, irregularly abbreviate-ovate, a little more 

 than a third the length of the shell; parietal wall with a 

 strongly compressed prominent lamina; peristome acute, 

 straight, regularly curved, margins remote ; columella tortu- 

 ous, not plicate or dentate. Length 2%, major diameter 1^ 

 mm. (Garrett). 



Austral Is.: Rurutu (Ch. De Gage). 



Tornatellina affinis GARRETT, Proc. Acad. Nat. Sci. Phila., 

 March 25, 1879, p. 23. 



' ' This species, which we have ventured to record as new, is 

 shaped very much like philippii, but the whorls of the spire 

 are flattened, and the body is not so turgid as in that species. 



