346 PROCEEDINGS OF THE NATIONAL MUSEUM. 



PIRENELLA CYCLUS. new species. 



Shell small, white mottled with brown, probably darker when fresh, 

 with six flattish whorls (excludmg the lost nucleus) separated by a 

 rather obscure suture; spiral sculpture of (on the spire and the upper 

 half of the last whorl tln-ee) rows of prominent hemispherical nodules, 

 with subequal interspaces; on the lower half of the last whorl, four 

 undulated or obscurely nodulose flattish cords with narrower inter- 

 spaces; beside these there is fine spiral threading over the surface 

 and in the interspaces; the nodules are arranged in vertical lines above 

 one another and give the effect of ribs, but the ribs if any are very 

 feeble and hardly perceptible in the interspaces ; base rounded, aperture 

 rounded, the outer lip slightly thickened, not mtemally lirate; body 

 and pillar with a thick coat of enamel, pillar shorter than the aperture, 

 with a sharp siphonal sulcus behmd it. Height of shell, 6.5; of last 

 whorl, 3.5; diameter, 3.5 mm. U. S. Nat. Mus. Cat. No. 215572. 



Type-locality. — -Laguna Beach, California; Mrs. Ball. 



CLAVA CALIFORNICA, new species. 



Shell conic, slightly turrited, white with brown maculation on the 

 spirals, or all brown, with more than six whorls (the apex defective) 

 separated by an obscure more or less undulated suture; spiral sculp- 

 ture on the spire of one strong beaded band in front of the suture and 

 two subequal smaller ones m frono of that, with narrower chamieled 

 interspaces, a narrow groove on each side of the floor of the inter- 

 space; on the rounded base are seven narrow grooves with wide flat- 

 tish mterspaces; last whorl suddenly enlarged with a strong rounded 

 varix above the pillar and at the outer lip; aperture oblique, pro- 

 duced at the posterior commissure into a sort of channel; pillar very 

 short, canal narrow, deep; the axis has a smgle sharp plait, hardly 

 visible in the aperture but continuous up the spire, in addition to the 

 sharp edge of the piUar; height of shell (six whorls), 28; of last whorl, 

 14; diameter, 13 mm. U. S. Nat. Mus. Cat. No. 264899. 



Type-locality. — South end Tiburon Island, Gulf of California; Dr. 

 Paul Bartsch. This is the first record of the genus on the west coast. 



TACHYRHYNCHUS EROSUS, new variety MAJOR. 



Shell resembling T. erosus, but much larger and coarser, of eight or 

 more whorls, the apex as usual much eroded; suture almost appressed, 

 rather obscure; spiral sculpture of (between periphery and suture 

 five) channeled grooves with low flattish wider interspaces; on the 

 flattish base there are four more, closer and diminishing toward the 

 axis; aperture rounded, outer lip thin, deeply widely, retractively 

 arcuate, inner lip with a glaze of enamel, pillar lip shghtly thickened 

 and at the anterior end a little produced; the interior of the aperture 



