KO. 2295. ]\-EW NORTH PACIFIC MOLLUSKS—DALL. 335 



the last whorl becomes nearly as strong as the others; aperture 

 rounded, outer lip simple, periodically varicose; body erased, ])illar 

 straight; canal distinct, open, narrow, slightly recurved; height of 

 shell, 29; of last Avhorl, 21.5; of apertm'e and canal, 15; diameter, 

 16 mm. U. S. Nat. Mus. Cat. No. 222569. 



Type-locality. — U. S. Fish Commission station 4205, near Port 

 Townsend. Washington; in 20 fathoms, hard bottom; temperature, 

 50.8° F. 



The operculum is purpm'oid and dark brown. 



TRITONALIA EPIPHANEA, new species. 



Shell small, dark brown, acute, with an angular shoulder, slender, 

 with six whorls exclusive of the (lost) nucleus; suture distinct, 

 slightly wrinkled and more or less appressed; spiral sculpture of (on 

 the penultimate whorl six above and seven below the shoulder) 

 strong equal threads with narrower interspaces, the whole slightly 

 imbricated and covering the entu-e surface in a regular manner; 

 axial sculpture of (on the last whorl seven) strong rounded ribs 

 most prominent at the shoulder and with much wider interspaces, 

 the spire deeply constricted at the suture; aperture oval, the outer 

 lip thickened but not reflected, internally white with six equal and 

 equally spaced denticulations, the body and arcuate short pillar 

 with a layer of wliite enamel; the canal long, closed near the aper- 

 ture, with a narrow lasciole and slightly recurved; height of shell, 

 25; of last whorl, IS; of aperture and canal, 13; diameter, 11 mm. 

 U. S. Nat. Mus. Cat. No. 216809. 



Type-locality. — wSan Pedro, California, collected by Dr. Tremper. 



TRITONALIA TRACHEIA, new species. 



« 



Shell small, solid, rough, of a greenish gray color, of about five 

 strongly shouldered whorls, the nucleus lost; the suture obscure, not 

 appressed; axial sculpture of (on the penultimate whorl 9, on the last 

 whorl 6 or 7) strong ribs, subspinose at the shoulder, and extending 

 to the base; beside these there are rude incremental lines; spiral 

 sculpture on the spire of two strong cords at the periphery, nodulous 

 where they cross the ribs; on the last whorl below the periphery 

 there are three strong cords with narrower deep interspaces, then a 

 wider gap and two more on the canal; aperture subcircular, dark 

 green, with an entire simple margin, the operculum muricoid; canal 

 short, solidly closed, straight, with an imbricate siphonal fasciole; 

 height of shell, 11.5: of last whorl, 8; diameter, 8 mm. U. S. Nat. 

 Mus. Cat. No. 207084. 



Type-locality. — Sitka, Alaska, in 15 fathoms, mud, dredged by 

 W. H. Dall. 



