68 BULLETIN 68, UNITED STATES NATIONAL MUSEUM. 



TURBONILLA (PYRGOLAMPROS) HALIA, new species. 

 Plate 5, fig. 11. 



Shell elongate-conic, wax-yellow at the summit, grading to brown 

 at the suture; anterior part of base, wax-yellow. (Nuclear whorls 

 decollated.) Post-nuclear whorls flattened in the middle, rounding 

 gently toward the summit and the suture, marked by low, broad, 

 well rounded, slightly protractive axial ribs, of which 16 occur upon 

 the second, 18 upon the third and fourth, 20 upon the fifth to sev- 

 enth, 24 upon the eighth, and 28 upon the penultimate turn; upon 

 this they are less regular, somewhat enfeebled and retractive. Inter- 

 costal spaces a little narrower than the ribs. Sutures well impressed. 

 Periphery of the last whorl well rounded. Base moderately long, 

 well rounded. Entire surface of spire and base marked b}^ numerous 

 fine, crowded, wavy spiral striations. Aperture oval; posterior 

 angle acute; outer lip thin, sho.wing the external sculpture and 

 coloration within; columella slender, slightly curved and revolute; 

 parietal wall covered by a thin callus. 



The type (Cat. no. 59328, U.S.N.M.) was collected at San Diego. 

 California. It has 10 post-nuclear whorls and measures: Length 

 8.5 mm., diameter 2.5 mm. 



Cat. no. 205946, U.S.X.M., contains a specimen collected by Mr. 

 H. N. Lowe in 8 fathoms off San Pedro. Cat. no. 205947, U.S.N.M., 

 two additional s]>ecimens from the same gentleman, collected in 10 

 fathoms off San Pedro. One specimen in Mr. S. S. Berry's collec- 

 tion comes from Santa Barbara, California. 



TURBONILLA (PYRGOLAMPROS) LYALLI Dall and Bartsch. 



Plate 6, figs. 6, 6a. 



Turbonilla (Pyrgolam.pros) lyalli Dall and Bartsch, Proc. U. S. Nat. Mus., 

 vol. 33, 1907, pp. 500,501, pi. 44, figs. 4, 4a. 



Shell small and slender with strong sculpture, whitish with a broad 

 chestnut band which extends almost halfw^ay over the exposed por- 

 tion of the w^horls above the periphery and an erpial distance anteri- 

 orly over the base below the periphery. Nuclear whorls two, closely 

 appressed to each other, forming a polished depressed helicoid spire, 

 which does not extend beyond the outline of the post-nuclear spire, 

 is not at all immersed and has its axis at right angles to the axis of 

 the succeeding turns. Post-nuclear whorls decidedly flattened, 

 moderately contracted at the periphery, and slightly shouldered at 

 the summit, ornamented by strongly elevated, moderately broad, 

 rounded retractive axial ribs, which become somewhat flattened 

 toward the summit and periphery of the turns. There are about 22 

 ribs upon the second, 20 upon the fifth and the penultimate turn. 

 Upon the first they are very weakly expressed. Intercostal spaces 



