CLASS GASTROPODA 
207 
Grayish white under a smooth, thin, brownish epidermis. Length, 
91 mm. (Tryon, Manual of Conchology.) 
Type in Zoology Museum, Copenhagen. Type locality not known to 
writer. 
Range. Point Barrow, Arctic Ocean; circumboreal. 
This was described as Sip ho kroyeri. 
Plicifusus arcticus Philippi, 1850 
Abbildungen und Beschr eibung en neue oder wenig gekannte Conchy lien, 3:119; 
PI. 5, fig. 5. 
Testa fusiformi, gracili, rufo-cornea, plicis longitudinalibus confertis, 
striisque transversis impressis, confertissimis sculpta; anfractibus modice 
et aequaliter, convexix; apertura ovato-oblonga, intus laevissima; labio 
distincto nullo; canali dimidiam aperturam vix aequante. (Philippi.) 
Shell fusiform, slender, reddish-brown, sculptured with close-set 
longitudinal and impressed cross striae; whorls moderately and equally 
convex, aperture ovate oblong within very smooth, with no distinct lip, 
canal scarcely equaling the half of the aperture. (Translation.) 
Type in? Type locality not known to writer. 
Range. Arctic Ocean, Bering Sea, Aleutian to Shumagin Islands, 
Alaska; circumboreal. 
Plicifusus johanseni Dali, 1919 
Plate 14, fig. 4 
Scientific Results of the Canadian Arctic Expedition, 8:21; A, PI. 3. 
Shell fusiform, whitish, with six or more slightly rounded whorls 
exclusive of the (lost) nucleus; suture distinct, not appressed or channeled; 
but rather deep; the first three or four whorls are feebly axially plicate, 
the obscure riblets anteriorly protractive and varying in number up to ten; 
very faint irregular traces of them, or some of them, may appear on the 
last whorl; spiral sculpture of numerous, strap-like, flat lines; spiral made 
duplex by a medial groove and separated by much narrower interspaces 
crossed by fine incremental lines; canal short, slightly recurved; outer lip 
arcuate, somewhat produced below the periphery; body and pillar with a 
coating of enamel; pillar attenuated in front, nearly straight. Length of 
(decollate) specimen, 52; of last whorl, 39; of aperture, 26; max. diam., 
22 mm. (Dali.) 
Type in Ottawa. Type locality, Point Barrow sandspit, Alaska. 
Range. Point Barrow to Icy Cape, Arctic Ocean. 
[207 ] 
