526 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiv. 
TRITONOFUSUS (PLICIFUSUS) SPITZBERGENSIS Reeve. 
Plate XXXVI, fig 7. 
Fusns spitzbergensis Reeve, in Belcher's Last of the Arctic Voyages, II, 1855; 
App. p. 395, pi. XXXII, fig. 6, a — b. 
Neptunea (Sipho) terebralis Gould, Proc. Best. Soe. Nat. Hist., VII, vSept., ISfiO, 
p. 326. 
Sipho lividus (Morch) Verrill, Proc. U. S. Nat. Mus., VI, 1883, p. 238, pi. ix, 
fig. 12. 
Spitsbergen and the Arctic and Bering seas. U.S.N.M., 108989. 
This fine shell was described by Reeve and Gould from the same 
specimen in the Cumingian collection. It is, when in perfect condition, 
more or less marbled with dark reddish brown and lighter patches, 
most conspicuous on the spirals. In weathered specimens the color is 
apt to be lost. The axial sculpture is obsolete, but can usually be dis- 
cerned near the apex. The sinuation of the outer lip, near the body, in 
the adult is profound. The sculpture is somewhat variable and the 
spiral ridges more or less prominent, fewer or more numerous, and the 
shell also varies in slenderness. The specimen figured is from Cape 
Espenberg near Bering Strait. 
TRITONOFUSUS (PLICIFUSUS) ROSEUS Dall. 
Plate XXXVI, fig. 4. 
Chrysodomus roseus Dall, Proc. Cal. Acad. Sci., VII, 1877, p. 7; Sci. Expl. 
Alaska, Bucdnidie, 1879, pi. iii, fig. 5. 
Arctic Ocean near Bering Strait, Capt. 11 E. Smith. U.S.N.M., 
108985. 
Shell when fresh with a distinct rosy tint, fading in the cabinet to 
white, with a very thin pale olive periostracum. The apex is not 
swollen as in most of the species, but on the other hand is not planor- 
boid as in Sij)hono7'his. It has a polished periostracum, and all the 
specimens dredged had a commensal sponge attached to the spire. The 
axial sculpture exists only in traces near the apex. 
TRITONOFUSUS (PLICIFUSUS) MARTENSI Krause. 
Plate XXXIV, fig. 6. 
Sipho martensi Krause, Arch. Mr Naturg. 1885, p. 287, pi. xviii, fig. 18. — Dall, 
Proc. U. S. Nat. Mus., 1886, p. 302. 
Chrysodomus martensi Dall, Proc. U. S. Nat. Mus., VII, 1884, p. 525. (Name 
only.) 
Fiisus (Euthria) conulus Aurivillius, Vega Exp. vet. arb. , IV, 1885, p. 354, pi. 
XIII, fig. 6. 
Point Barrow and south to St. Lawrence Island, Bering Sea, in 12 
to 55 fathoms. U.S.N.M., 108980. 
