1918.] 



NATURAL SCIENCES OF PHILADELPHIA. 



237 



TWO NEW SHELLS FROM HAYTI. 



BY E. G. VANATTA. 

 Odontosagda abbotti n. sp. Figs. 1, 2. 



Shell small, depressed, translucent white. Apex large, obtuse, 

 spire low-conic, sutures distinct, whorls 4f , slowly increasing, some- 

 what contabulate, body whorl 

 convex, subangular above the 

 periphery, contracted below. 

 Surface smooth, indistinct; ir- 

 regular, the longitudinal strise, 

 2 '^?/7^:,,V2\W' seen under a lens, without 

 spiral sculpture. Umbilicus 

 wide, deep, well-like, its width contained about 4.5 times in the diam- 

 eter of the shell. Aperture lunate, peristome simple, acute, convexly 

 arched above, depressed arcuate below. Columella slightly refiexed, 

 parietal callus very thin. Palatal wall with traces of a callus at the 

 periphery and base, near the peristome. At a distance of about 

 one-fourth of a whorl within the aperture, two short, high, white 

 teeth or lamella3 may be seen. These and a third tooth are visible 

 through the translucent base. One very oblique transverse tooth is 

 situated near the periphery, another longer one is plac'ed spirally on 

 the base, and traces of the third very short one may be indistinctly 

 seen through the shell, on the columellar wall, close to the suture, 

 within the umbilicus. 



Alt., 1.22; diam., 2.1; aperture alt., .75; diam., .83 mm. 

 The types are in the collection of The Academy of Natural Sciences 

 of Philadelphia, tray No. 118,240, from The General's Cave, one 

 mile west of Jeremie, Hayti. Found in debris collected by Dr. W. L. 

 Abbott at the base of a cliff about 300 yards from the seashore. 



This species cUffers from 0. hilli Pfr., of Cuba, which it resembles 

 most in shape, by being smaller, the palatal lamellse are shorter. The 

 apex and umbilicus are also smaller. It also differs from 0. blandi 

 Weinl., of Hayti by having a more depressed spire, fewer whorls- 

 It is also smaller, the palatal lamina near the periphery is not lunate 

 the basal lamina is shorter and the umbilicus is larger. 



