WEST AMEEICAN PYRAMIDELLID MOLLUSKS. 51 



band. Sutures strongly constricted. Peripheiy of the last whorl 

 well rounded. Base short, well rounded. Entire surface of spire and 

 base marked by numerous microscopic, closely crowded, ^vslyj, spiral 

 striations. Aperture subquadrate, very broad at base, posterior angle 

 obtuse ; outer lip thin, bent very strongly at its basal angle ; columella 

 slender, slightly oblique, almost straight, weakly revolute. 



The type (Cat. no. 206856, U.S.N.M.)has ten post-nuclear whorls, 

 and measures: Length 6.3 mm., diameter 1.9 mm. It was dredged 

 by the U. S. Bureau of Fisheries at station 4322, off La Joila, Cali- 

 fornia, in 110 to 197 fathoms. Another specimen was dredged by 

 the University of California off Catalina Island. 



TURBONILLA (STRIOTURBONILLA) GALIANOI, new species. 

 Plate 4, figs. 12, 12a. 



Shell elongate-conic, milk-white, shining. Nuclear whorls very 

 small, two and one-half, forming a rather elevated spire, having their 

 axis at right angles to that of the succeeding turns, in the first of 

 which they are about one-fourth immersed. Post-nuclear whorls 

 well rounded, very strongly tabulately shouldered at the summit, 

 ornamented with well-develop?d, rounded, slightly protractively 

 curved axial ribs. Of these ribs, 16 occur upon the first, second, and 

 third, 18 upon the fourth and fifth, 20 upon the sixth, 22 upon the 

 seventh, 24 upon the eighth, 26 upon the ninth, and 28 upon the 

 penultimate turn. These ribs extend equally strong from the sum- 

 mit to the periphery of the whorls. Intercostal spaces not quite as 

 wide as the ribs, well impressed, extending anteriorly to the suture. 

 Sutures strongly constricted. Periphery of the last whorl well 

 rounded. Base rather long, well rounded. Entire surface of spire 

 and base marked by exceedingly fine spiral striations. Aperture 

 subquadrate, posterior angle obtuse; outer lip thin, showing the 

 external sculpture within; columella almost straight, slightly revolute. 



The specimen described and another individual (Cat. no. 4104, 

 U.S.N.M.) were collected by J. Xantus at Cape St. Lucas, Lower Cali- 

 fornia. It lacks the nucleus; the ten remaining whorls measure: 

 Length 6.1 mm., diameter 1.8 mm. 



Three additional specimens (Cat. no. 162437, U.S.N.M.) come from 

 Pacific Beach, San Diego, California. Cat. no. 162438, U.S.N.M., 

 three specimens from San Hipolite Point, Lower California. Cat. 

 no. 162441, U.S.N.M., another specimen from the same locality. 

 Cat. no. 162439, U.S.N.M., two specimens from Point Abreojos, 

 Lower California. The Delos Arnold collection contains two indi- 

 viduals from San Hipolite Pointy Lower California. 



Named for Galiano, the Spanish explorer of California. 



