1913.] NATURAL SCIENCES OF PHILADELPHIA. 25 



Alt. 1.25, diam. 2.47 mm. 



Locality. — Monkey River, British Honduras. 



The types are in the Academy's collection, tray number 76,-581, 

 and were taken from the anchor of a vessel by Silas L. Schumo, 

 in whose honor the species is named. 



This shell differs from Discopsis omalos De Folin by the radial 

 sculpture on the base and the projection upon the outer lip, and has 

 different basal sculpture from Discopsis costulatum De Folin. It 

 differs from Colonia radiata Dall by having no longitudinal costse 

 upon the spire and having a large umbilicus. 



Omalaxis funiculus contracta n. var. PI. 11, figs. 4, 6. 



Shell small, white, somewhat polished; spire flat, bounded by a 

 sharp angle; whorls about three and one-half, sculptured above 

 with about seven or eight engraved spiral lines which become 

 indistinct as they approach the aperture, ten engraved spiral lines 

 are between the edge of the spire and the peripheral keel and eleven 

 between the keel and the umbilicus, these lines and the peripheral 

 carina become obsolete near the aperture. The umbilicus is 

 perspective, funnel shaped, with smooth sides, and surrounded by 

 a sharp carina. The aperture is suborbicular; peristome thick 

 and evenly rounded; basal lip with a triangular callus; columella 

 thick and very oblique; parietal callus ponderous and extending 

 slightly beyond the aperture. 



Alt. 1.04, diam. 1.85 mm. 



Habitat. — Monkey River, British Honduras. 



The type is in the collection of the Academy, tray number 106,125, 

 taken from the anchor of a vessel by Silas L. Schumo. 



This variety is distinguished from Omalaxis funiculus Dall by 

 having a narrower umbilicus. 

 Teinostoma schumoi n. sp. PI. II, figs. 5, 10. 



Shell small, imperforate, white, polished, subspherical, very 

 compact, suture impressed, early whorls rather concave in the middle, 

 with the surface more or less undulate, the penultimate whorl with 

 a spiral groove near the outer suture. The body whorl has the upper 

 surface sculptured with a series of longitudinal undulations and a 

 spiral cord at the edge. The face view shows seven widely spaced 

 very heavy spiral cords, the two at the periphery being smallest. 

 The base is imperforate, showing two of the spiral cords near the 

 edge and a series of radial indentations bounded on the lower side 

 by an engraved line. The umbilical region is slightly indented and 

 provided with a few irregular radial growth lines. The aperture 



