1912.] 



NATURAL SCIENCES OF PHILADELPHIA. 



505 



Kingicula hypograpta n. sp. Text fig. 2. 



Shell globose-conic, solid, composed of four moderately convex 

 whorls. Apex obtuse. Surface smooth above, minutely engraved 

 spirally below the periphery with about 

 10 lines ; growth-lines visible but weak. 

 The last whorl terminates in a thick 

 and strong, rounded lip-varix. Outer lip 

 is thickest in the middle, where it bulges 

 forward and inward. Columella has a 

 strong upper and thinner basal lamella. 

 Parietal callus thick, provided with a 

 small median fold. 



Length 2.1, diam. 1.5 mm. 



Gatun bed, Lower Locks at Gatun. 



Fig. 2. 



Pleurotoma (Gemmula) vaningeni n. sp. PL XXII, 



fig. 4. 



The shell is composed of about 13 

 whorls, of which the first 2\ are smooth 

 and convex ; next whorl also convex, with sculpture of close, 

 regular, axial ribs. At the beginning of the following whorl the 

 sculpture changes abruptly. A strong, rounded cord appears imme- 

 diately below the suture, and a stronger, wider one occupies the 

 middle of the exposed part of the whorl, its summit bearing tubercles 

 which are noticeably longer in the axial direction. On the last 

 three whorls there are several spiral threads in the sulci above and 

 below the median tuberculate ridge, and the tubercles upon the 

 latter become somewhat more compressed. The last whorl has 

 about ten major spirals and numerous unequal spiral threads below 

 the peripheral ridge, the upper three spirals larger than the lower 

 ones. There are also on the last three or four whorls rather close- 

 set, retractive axial threads above the beaded ridge. 



Length 19.5, diam. 7.3 mm. 



Excavation at Gatun Locks. 



This handsome species is named for Dr. Gilbert Van Ingen, of 

 the Princeton University Museum. 



Drillia enneacyma n. sp. Text fig. 3. 



The shell is small, fusiform, composed of about 8 whorls, the first 

 three smooth, the rest having sculpture of strong, rounded, slightly 

 protractive, smooth, axial ribs, about as wide as their intervals and 

 nine on each whorl. On the last whorl the ribs stop rather abruptly 

 where the convex portion of the whorl passes into the short, tapering 



