26 PROCEEDINGS OF THE ACADEMY OF [Jan., 



is suborbicular, receding; outer lip rather acute; parietal wall very 

 thick. The columella is very broad and provided with a ponderous 

 callus. 



Alt. 1.51, diam. 2.23 mm. 



Locality. — Porto Barrios and Livingston, Guatemala. 

 The types are in the collection of the Academy, tray number 

 73,483, and were found in mud collected from the anchor of a vessel 

 at both places. 



This species differs from Teinostoma solida Smith by having radial 

 sculpture on the base, by having sculpture on the upper surface 

 and has more spiral costse than Teinostoma hondurasensis and is 

 imperforate. 

 Teinostoma hondurasensis n. sp. PI. II, figs. 8, 12. 



Shell small, polished, blue-white, translucent; spire slightly 

 elevated, broadly conic; suture impressed; whorls four, a little 

 convex, early whorls smooth, with a few indistinct growth striae 

 and a groove following the suture on the penultimate whorl. Body 

 whorl from above rapidly increasing, is smooth, highly polished 

 with a groove near the edge which becomes obsolete towards the 

 aperture. In a face view it shows five spaced subequal spiral cords. 

 The base is umbilicate, with a broad, smooth central area, bounded 

 by a granulate ridge near the parietal wall which becomes a tuber- 

 culate spiral ;?ord and finally a smooth cord at the basal lip. Two 

 other spaced smooth spiral costse are upon the outer part of the 

 base. 



The aperture is suborbicular, receding; peristome evenly arched, 

 moderately thick, slightly interrupted by the terminations of two 

 costse near the base; basal lip thick; columella provided with a broad 

 triangular callus; parietal wall very thick; umbilicus small. 

 Alt. 1.04, diam. 1.75 mm. 



Habitat. — Belize and Monkey River, British Honduras. 

 The types are in the Academy's collection, tray number 76,535, 

 found in mud taken from the anchor of a vessel at both places by 

 Silas L. Schumo. 



This species differs from Teinostoma solida Smith by being white, 

 smaller, umbilicate, and having a different number of spiral cords. 

 It is distinguished from Teinostoma schumoi by being umbilicate 

 and having a different sculpture. 

 Teinostoma bartschi n. sp. PI. II, figs 9, 11. 



Shell minute, discoidal, blue-white, somewhat translucent near the 

 aperture; whorls three and one-half; suture shallow; spire very low 



