SIPHO CORDATUS. 185 



shell ; spire elongate, regularly diminishing in size, ending in a twisted and slightly 

 bulbous but not mammiform apex : suture deep ; moutli oval, angulate above ; 

 outer lip contracted below ; inner lip forming a thin, narrow, well-defined glaze 

 upon the pillar; canal bending slightly to the left; pillar sinuous. 



Dlriiensions. — (Of Crag specimens.) L. 50 — 55 mm. B. 21 mm. 



DistiihiUion. — Recent: Behring Sea and the Aleutian Islands, in 50 to 180 

 fathoms. 



Fossil : Waltonian Crag : Little Oakley. 



Remarks. — The Crag fossils figured under this name were found at Oakley in 

 1911. They belong to the foijatns group, but differ from the typical form of that 

 species in sculpture, in their less concave whorls and nearly straight canal. There 

 is a specimen of (S. HereiideeiiH in the British Museum (PI. XXV, fig. 9), originally 

 obtained from Dr. Dall by Messrs. Sowerby and Fulton, which agrees very nearly 

 with one of my shells (fig. 8); the other (PI. XXII, fig. 11) is longer in the 

 spire. 



Our fossils are rather worn, l)ut the bifid character of some of the spiral costee 

 and the fine intermediate lines towards the base may be seen in places by the aid of 

 a lens. In view of the fact that at present S. Herendeenii is known only from the 

 Behring Sea, I am disposed to agree with Dr. Dall that it should be regarded as 

 specifically distinct. If my identification of the Oakley shells with the latter is 

 correct it affords another link connecting the Crag fauna with that of the North 

 Pacific. 



Sipho cordatus (A. Bell). Plate XXII, fig. 5. 



1871. Fusiis cordatus, A. Bell, Ann. Mag. Nat. Hist. [4], vol. vii, p. 355. 



Specific Characters. — Shell thick and strong, turreted, fusiform; spire produced, 

 regularly tapering ; apex irregularly twisted, but slightly bulbous; whorls some- 

 what convex, covered with strong spiral costal which extend nearly to the base of 

 the shell ; canal narrow, bending slightly to the left ; mouth ovate, angulate above ; 

 inner lip forming a thin glaze adherent to the pillar. 



Diinensions. — L. 45-50 mm. B. 16-20 mm. 



Distribution. — Not known living. 



Fossil : Red Crag : all zones, not very common. 



Remarks. — Among the Oakley specimens of Sipho in my collection are about a 

 score which separate themselves distinctly from the rest by their coarse spiral 

 ornamentation and their general form and appearance. On showing these to Mr. 

 Alfred Bell, he recognised them as an unfigured species described by him in 1871 

 as Fusus cordatus. At that time he was disposed to think "Wood's 1848 figure of 

 Trophon gracilis, var. j5 (Mon. Crag Moll., pt. i, tab. vi, fig. lOh), was the same, 



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