

Doll and Bartsch The Pyranridellidce. 15 



The type, number 136,023 U. S. National Museum collection, is a 

 fossil, coming- from the Oligocene deposit at Oak Grove, Sta. Rosa Co., 

 Florida. It has six and one-half postnuclear whorls which measure: 

 long., 3.1 mm.; diam., 1.4 mm. 



Turbonilla (Baldra) archeri sp. nov. 



Shell small, elongate-conic, turriculated, milk-white. Nuclear whorls 

 two and one-half, helicoid, about one-fourth immersed in the first post- 

 nuclear whorl, having their axis at a right angle to the axis of the later 

 whorls. Postnuclear whorls moderately well rounded, having cuspidat 

 ed tabulated shoulders and a spiral ridge at the summit and the peri 

 phery. Axial ribs prominent, narrow, tlexuose, about one-third as wide 

 as the intercostal spaces, sixteen occur upon the first, eighteen upon 

 the fourth and the penultimate whorls. Intercostal spaces decidedly 

 depressed between the spiral ridges, crossed by many subequally 

 spaced microscopic spiral striations. Suture channelled. Periphery 

 of the last whorl angulated, rendered somewhat crenulated by the 

 axial ribs which extend feebly over the base to the umbilical region. A 

 broad, depressed tumid ridge extends across the anterior half of the 

 base, and the space between the posterior termination of this ridge and 

 the peripheral ridge appears somewhat concave. Entire base finely and 

 closely spirally striated. Aperture suboval, posterior angle obtuse, 

 outer lip thin, angulated at the shoulder and periphery; columella 

 straight, slightly reflected; columellar fold obsolete or internal; parietal 

 wall covered by a thin callus. 



The type and another specimen are registered as number 58,016 in 

 the collection of the Academy of Natural Sciences, Philadelphia. They 

 were collected by S. Archer, at Singapore. The type has seven postnu 

 clear whorls and measures: long., 3.3 mm.; diam., 1.3 mm. 



Odostomia (Villa) pilsbryi sp. nov. 



Shell slender, milk white. Nuclear whorls two and one half, helicoid, 

 a little more than one-third immersed in the first postnuclear whorl, 

 having their axis almost at a right angle to the axis of the later whorls. 

 Postnuclear whorls flattened, or even slightly concave in the middle, be 

 tween the sutures; contracted near the summit, the posterior portion 

 appearing as a strong, rounded, spiral keel, separated from the rest of 

 the whorl by a spiral groove. Axial ribs prominent, scarcely indicated 

 on the spiral keel but beginning strong at the groove in front of the 

 keel and extending to the umbilical region, gradually diminishing in 

 strength from the periphery to the anterior termination. These ribs are 

 broadest and strongest at this posterior boundary, just anterior to the 

 groove and lend the shell a coronated appearance at this place. About 

 sixteen of them appear on the second and twenty upon the penultimate 

 whorl. Periphery and base well rounded. Sutures well impressed. 



