NO. 2295. A/;u- NORTH PACIFIC iWLLUSKS—DALL. 333 



range of the species from San Pedro, California, to Scammon Lagoon, 

 Lower California. The specimens which may be regarded as types 

 bear the museum catalogue numbers 252894 and 181827, respec- 

 tively, and were collected by W. L, Chambers at San Pedro and by 

 Henry Hemphill at San Diego, Cahfornia. 



TaiTONALU GRACILLIMA, new variety OBESA. 



Tritonalia gracilliina, var. ohesa (Stearns MS.) in collection. 



Shell resembling T. graciUima in most respects but notably wider, 

 rhe coloration is yellowish, with brown Hecks, especially on the 

 prominences. The canal is closed. The aperture is bluish white, 

 with four strong denticles on the anterior two-thirds of the inner lip. 

 Height of shell, 19; of aperture and canal, 8; diameter, 7.5 mm. 

 U. S. Nat. Mus. Cat. No. 228722. 



Type-locality. — Laguna Beach, California; received from C. F. 

 -Baker. 



TKITONALIA LUIUDA Middendorff, new variety IJOTUNDA. 



Shell small, short, much inflated, solid, with four or more whorls, 

 the apex eroded; suture appressed, obscure; axial sculpture incre- 

 mental, irregular, sometimes rising to lamellae, forming pits in the 

 interspaces of the spiral sculpture; the latter comprises (on the 

 penultimate whorl 5 or 6, on the last whorl about 14) strong, elevated, 

 blackish brown, more or less undulated and transversely striated 

 squarish ribs with narrower interepaces, covering the whole whorl; 

 aperture ovate, purplish when fresh, fading to light pmk in the cabi- 

 net; outer hp strong, crenate by the sculpture, internally thickened 

 and with six prominent denticles; inner lip erased, pillar short; canal 

 very short, but distinctly recurved; height of shell, 16.5; of aperture, 

 12.5; diameter, 13 mm. U. S. Nat. Mus. Cat. No. 208495. 



Type-locality. — Moss Beach, Halfmoon Ba}', California; collected 

 by F. L. Button. 



' TKITONALIA FMSCONOTATA, new species. 



Shell solid, light yellow brown, with sjiirai bands of dark brown 

 spots between the ribs, usually one at the periphery and another at 

 each end of the whorl, but sometimes missing; whorls fom- or five 

 exclusive of the (lost) nucleus, rather inflated; sutm-e distinct, con- 

 stricted, the whorl in front of it appressed and gathered into short, 

 minute, vertical wrinkles; axial sculpture otherwise of six or seven 

 prominent vertical ribs extending across the whorls and rather sharp 

 elevated incremental lines; spiral sculpture of (on the last whorl 

 about 24) subequal spiral cords with narrower channelled inter- 

 spaces, covering the whorl; aperture rather wide, white; outer lip 

 somewhat expanded, internally denticulate ; body and pillar erased; 

 canal short, closed in the adult, with a marked siphonal fasciole; 



