ART. 14. NEW MOLLUSKS FKOM ECUADOR BARTSCH. 3 



the fifth and sixth, 24 upon the seventh, and 28 upon the last turn. 

 Intercostal spaces moderately, deeply impressed, terminating at the 

 periphery, which is well rounded. Base moderately long, well 

 rounded, marked by lines of growth only. Aperture oval; posterior 

 •Migle acute; outer lip thin, showing the external sculpture within; 

 inner lip slightly sinuous, reflected over and appressed to the base, 

 for almost its entire length, provided with a feeble, oblique fold at 

 its insertion. 



The type, Cat. No. 359753, U.S.N.M., has 8.5 whorls and measures : 

 Length, 4.2 mm.; diameter, 1.3 mm. Cat. No. 359754, U.S.N.M., 

 contains two additional specimens from the same locality. 



The present species is nearest related to TurhoniUa {Chemnitzia) 

 kelseyi Dall and Bartsch, but differs from it by its much more ele- 

 gant features, strongly tabulated shoulder, with the crenulations at 

 the termination of the ribs at the summit forming a more conspicuous 

 beaded pattern. 



TURBONILLA (TURBONILLA) AXELI, new species. 



Plate 1, fig. 1. 



Shell small, elongate-conic, bluish white. Nuclear whorls two and 

 a half, smooth, forming a decidedly elevated spire which has its axis 

 at right angles to that of the succeeding whorls, in the first of which 

 the nuclear spire is about one- fourth immersed. Postnuclear whorls 

 rather high between summit and suture, with a broad, sloping, tabu- 

 lated shoulder. The whorls are crossed by strong axial ribs which 

 extend strongly from the summit to the periphery and feebly over 

 tlie base, forming slender cusps at the shoulder near the summit. Of 

 tliese ribs, 16 occur upon the first and second, 18 upon the third and 

 fourth, 10 upon the fifth, 22 upon the sixth, and 24 upon the last 

 turn. These ribs are about half as wide as the spaces that separate 

 them. The latter are decidedly excavated between the shoulder and 

 the suture, the termination of the excavation forming almost a keel 

 at the periphery of the last whorl. Suture somewhat constricted. 

 Base short, well rounded. Aperture oval; posterior angle obtuse; 

 outer lip thin at the edge, showing the external sculpture within; 

 inner lip curved, sliglitly reflected and appressed to the base for its 

 anterior three-fifths. 



The type. Cat. No. 359749. U.S.N.M., has 8 postnuclear whorls, hav- 

 ing lost the nucleus, and measures: Length, 3.9 mm.; diameter, 1.2 

 rnm. The nuclear whorls were described from a young specimen. 

 Cat. No. 359750, U.S.N.M., contains another specimen from the tyi>e 

 locality. 



This species differs from TurhoniUa {Turhonilla) centrota Dall 

 and Bartsch in being stouter and having the tabulated shoulder at the 

 summit much more sloping. 



