644 PROCEEDTXaS OF THE NATIONAL MUSEUM. vol.52. 



and somewhat distantly spaced spiral stnations. Aperture sub- 

 quadrate; posterior angle obtuse; outer lip thin, showing the external 

 sculpture within ; inner lip moderately stout, almost A'ertical, slightly 

 revolute, apparently without fold; parietal w^all glazed by a thin 

 callus. 



The type, Cat. 268718, U.S.N.M., was dredged by the U. S. Bureau 

 of Fisheries steamer Albatross at station 5678, off Kedondo Point, 

 Magdalena Bay, Lower California, in 13i fathoms, on broken shell 

 bottom. It has lost the nuclear turns and probably a half of the 

 first postnuclear whorl ; the 13 remaining measure — length, 7.4 mm. ; 

 diameter, 1.9 mm. 



The present species is nearest related to Turhanilla (Strioturbo- 

 nilla) humerosa Bartsch, but differs from this by having fewer, 

 stronger, and more distantly spaced axial ribs. 



TURBONILLA (STRIOTURBONILLA) SCHMITTI. new species. 



Plate 43, fig. 8. 



Shell elongate conic, rather stout, bluish white. Nuclear whorls 

 small, strongly rounded, forming a decidedly elevated spire, the axis 

 of which is at right angles to that of the succeeding turns, in the 

 first of which it is about one-fourth immersed. Postnuclear whorls 

 almost flattened, somewhat excurved below the strongly tabulately 

 shouldered summit, marked by somewhat sinuous, decidedly protrac- 

 • tively slanting, strong, regular, well-rounded axial ribs, of which 20 

 occur upon the first and second, 22 upon the third, and 24 upon the 

 remaining turns. These ribs extend strongly from the summit of 

 the whorls, where they appear as slender cusps, to the periphery, 

 w^here the}^ terminate. Intercostal spaces a little wdder than the 

 ribs, terminating also at the periphery. Suture rendered strongly 

 channeled by the shouldered summit. Periphery of the last whorl 

 well rounded. Base moderately long, well rounded, marked by strong 

 incremental lines and the exceedingly fine, closely spaced spiral stria- 

 tions which cover the entire surface of the shell. Aperture oval; 

 posterior angle narrowly squarely truncated by the flattened summit ; 

 outer lip thin, showing the external sculpture within; inner lip 

 slender, slightly oblique, and weakly revolute, provided with a very 

 feeble oblique internal fold at its insertion which is scarcely notice- 

 able when the aperture is viewed squarely. 



The type and two specimens of this species. Cat. No. 265739, 

 U.S.N.M., were obtained in shallow water at Point Abreojos, Lower 

 California. The type has 10 postnuclear whorls and measures — 

 length, 6.3 mm.; diameter, 2 mm. One of the other specimens has 

 11 postnuclear whorls and measures — length, 7.3 mm.; diameter, 

 2.1 mm. 



