248 LYROPUPA. 



8. LYROPITPA SPALDINGI n. sp. PI. 21, figs. 10, 12, 13. 



The shell is sinistral, rimate-perforate, somewhat ovately 

 fusiform, c.firtridgc buff, somewhat thick, translucent with a 

 silky sheen, marked with strong slightly fiexuous costfle, about 

 17 on the last whorl, the interstices are nearly smooth, in- 

 distinctly flexuously striate. .Spire convexly conic, tapering: 

 gradually to a slightly blunt apex, the upper whorls convex, 

 the last two very convex, slightly angulate above the periphery, 

 separated by a deep suture. Whorls 6i/ 2 , the embryonic 

 minutely granulose-wrinkled, the cost* appealing abruptly 

 at about the middle of the second whorl ; last whorl tapering 

 strongly towards the base, somewhat inverted-conic in outline, 

 with a rather acute base, deeply concentrically tri-s-ulcate 

 back of the aperture, the upper sulcus long and broad, ex- 

 tending for nearly % the length of the whorl, and reaching 

 almost to the lip. Aperture perpendicular, somewhat quad- 

 rangular iu outline with much rounded corners, the margin 

 continuous, free. Angular lamella short, blunt, extending to 

 the margin; parietal lamella deeply seated, its outer end ex- 

 tending just beyond the inner end of the angular, strong, long, 

 its free margin bent outwards, flexnous; infraparietal usually 

 present, very deeply seated and nearly nodule-like or short 

 lamella-like ; columellar lamella very deeply and axially seated, 

 nodular, viewed from above lunate with the horns pointing 

 outwards; upper palatal fold long, high in back, low in front, 

 extending to the inner margin of the peristoiue ; lower palatal 

 deeply seated, long, parallel to the upper ; there is present a 

 short, low, deeply and concentrically seated basal fold which 

 terminates almost at the base of the columellar lamella. Peris- 

 tome free, continuous, its outer margin expanded. 



Length 2.82, diam. 1.53, apert. 0.85 mm. 



Oahu: Waianae Mts. from Palehua to Mokuleia ; type local- 

 ity Puu Kana (Cooke). Type 11048, Bishop Museum, para- 

 types 37192, and 119470 A. N. S. P. 



This is by far the most abundant species of Lyropupa found 

 on the Waianae Mts., and its habitat extends over the whole 

 length of the range. It is especially abundant in talus, but is 



