510 A, E, Verrill— Catalogue of Marine Mollusea. 
large, smooth; apical whorl smaller than the next, somewhat ob 
liquely turned up, not inflated nor deformed. Aperture large and 
broad, irregularly elliptical (outer lip and canal of the larger speci- 
men, broken). The columelia-lip is incurved slightly near the pos- 
terior end of the aperture and again below the middle, the portion 
between being somewhat straight, giving that side of the aperture 
a crooked or thrice-bent outline; its surface is hollowed out, deeper 
than the spiral grooves. Columella much curved in a spiral direction, 
in a side-view receding strongly and then bending forward and out- 
ward, and becoming prominent and strongly twisted. Canal short, 
not very wide, twisted, bent forward. The back side of the canal, at 
base, is peculiarly swollen and gibbous, and curved forward. 
The operculum of the Murray Bay shell is irregularly obovate, the 
small end considerably incurved, with the nucleus at the tip; large 
end broadly rounded ; inner edge with an angle in the middle, where 
_the rounded outline meets the concave outline of the smaller half; 
outer edge with an obtuse angle beyond the middle; lines of growth, 
strong; color yellowish brown. 
Epidermis yellow, conspicuous, rather rough, rising into coarse 
lamellz and scales along the lines of growth, both on the cinguli and 
in the grooves. Shell ivory-white within, canal tinged with salmon. 
Length to base of canal, 70"; breadth, 36™™; apex to aperture 
(across seven whorls), 41"; breadth of seventh whorl, 31"; breadth 
of aperture, 17™"; breadth of apical whorl, 2™™. The Murray Bay 
example is 65" long ; breadth, 28"; length of body-whorl, 42™™ ; 
length of aperture, 31™™; its breadth, 14™™. 
This shell somewhat resembles S. Zslandicus, but it differs in hay- 
jng a smallerand more regular nucleus; in the more ventricose lower 
whorls, and deeper suture; in the peculiar broad fold and spiral twist 
of the columella, giving the aperture an irregular outline on that side ; 
and in the wider, short, and forward-bent canal. 
This species would belong to the generic group, Chrysodomus, as 
defined by G. O. Sars. Friele has proposed to make it the type of a 
new genus. 
Tritonofusus Kriyeri (MOll.) Morch. 
Fusus Kroyert Moller, Kréyer’s Tidss., iv, p. 88, 1842. 
Fusus (Tritonofusus) Kréyeri Morch, Rink’s Grénland, Tilleg, p. 85, 1857; Catal. 
MOll. Spitzb., p. 15, 1869. 
Fusus arcticus Philippi, Abbild., iii, p. 117, pl. 5, fig. 5, (t. Mérch). 
Buccinum cretacewm (Reeve) Packard, Canadian Nat., viii, p. 417, pl. 2, fig. 6, 1863; 
Mem. Boston Soc., Nat. Hist., i, p. 288, pl. 7, fig. 7, 1867. 
Tritonium arcticum Schmidt (t. Leche). 
