502 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxiii. 



TURBONILLA (PYRGOLAMPROS) VALDEZI, new species. 



Plate XLIV, figs. 3, 3a. 



— Turbonilla {Fyrgokmipro.s) gihbona Dall and Bartsch, Mem. Gala. Acad. Sci., 

 Ill, 1903, pp. 27-9, pi. I, figs. 2, 2a, not Chemnitzia gibhosit Carpenter, Cat. 

 Maz. Shells, 1857, p. 430, No. 525. 



Shell inflated, robust, broad and stumpy, of light, fulvous colora- 

 tion. Nuclear whorls decollated in the type. Post-nuclear whorls 

 flattened, somewhat contracted at the periphery and rounded at the 

 summit, traversed by broad, coarse, irregularly slanting axial ribs, 

 which extend over the inflated periphery of the last whorl to the 

 umbilical region, appearing less prominent on the base. About 10 of 

 these ribs occur upon the second, 18 upon the lifth, and 21 upon the 

 penultimate post-nuclear whorl. Entire surface of the shell crossed b}^ 

 very minute, close spiral striation. Suture subchanneled and wavy. 

 Aperture ovate, outer lip thin, joining the twisted and re volute colu- 

 mella in a broad curve. 



The type (Cat. No. 32273, U.S.N.M.) was collected at Monterey, 

 California. It has 7 post-nuclear whorls and measures: Length 

 5.6 mm., diameter 2.1 mm. 



Another specimen, not quite adult (Cat. No. 176621, U.S.N.M.), 

 comes from Pacific Grove, California. This has the nuclear whorls 

 preserved, which are two, depressed helicoid, smooth, obliquel}" about 

 one-fourth immersed in the first of the succeeding turns, and having 

 their axis at right angles to that of the later whorls. The left side of 

 its nucleus projects slightly be3^ond the outline of the spire. 



The present form is in every way nuich more robust than T. (P.) 

 gibhosa Carpenter, which was descril^ed from Mazatlan, Mexico. 



TURBONILLA (PYRGOLAMPROS) AURANTIA Carpenter. 



Plate XLV, fig. 5. 



Chemnitzia (?var. ) aurantia Carpenter, Journ. de Conch., XII, 1865 (3d ser., 

 v.), p. 147. 



Shell similar to T. (P.) cliocolata Carpenter, but much broader, with 

 the close spiral striation a little more pronounced than in that species, 

 covered by a golden-j^ellow epidermis. Nuclear whorls decollated in 

 all our specimens. Post-miclear whorls moderately rounded, but 

 little contracted at base and but very slightly shouldered at the sum- 

 mit, ornamented by about 22 moderatel}^ developed, slightly retractive 

 axial ribs on each of the whorls. These ribs become quite obsolete as 

 they pass over the well-rounded periphery and base of the last whorl. 

 Intercostal spaces weak, much narrower than the ribs. Sutures quite 

 prominent, simple. Aperture large, broadly ovate, posterior angle 

 obtuse, somewhat efl'use at base; outer lip thin, columella slender, 

 quite oblique, twisted, and revolute. 



