EAST AMERICAN SCAPHOPOD MOLLUSKS. 



107 



The type, Cat. No. 78626, U.S.N.M., was obtained at U. S. B. F. 

 Station 2711, off Maryland, in 1,544 fathoms, bottom of globigerina 

 ooze. 



Other lots were taken by the Albatross from numerous stations off 

 the New Jersey and Maryland coast in 1,457 to 1,859 fathoms. 



This species is readily distinguished by its great size and the con- 

 spicuous obtusely angled swelling just behind the constricted aperture. 

 It belongs to a group of very large Caduli, including C. poculum, C. 

 aequalis, G. grandis, etc. To C. i:>oculum and C. elephas it is closely 

 related by reason of the extreme anterior position of the equator. 



The following; are the museum collection lots : 



1 Type. 

 CADULUS (PLATYSCHIDES) ELEPHAS, new species. 



Plate 17, fig. 10. 



1889. Cadulus spectabilis, Dall, Bull. Mus. Comp. Zool., vol. 18, p. 429, in part. 

 1889. Cadulus spectabilis, Dall, Bull. 37, U. S. Nat. Mus., p. 76, in part and not 



including figure. 

 1898. Cadulus (Polyschides) spectabilis, Pilsbry and Sharp, Tryon's Man. of 



Conrh., vol. 17, p. 153, in part and not including figure. 

 1903. Cadulus spectabilis, Dall, Bull. 37, U. S. Nat. Mus., p. 76, in part and not 



including figure. 



The shell is very large, solid, and heavy, rather strongly curved in 

 the posterior portion and with the section of greatest diameter imme- 

 diately back of a constricted oblique anterior aperture, which is at 

 about the anterior fifth or sixth. The convex side forms a regular 

 arch to the equator, and thence a straight sharp descent to the ante- 

 rior aperture over a flattened surface. The concave line is more 

 deeply arched in the posterior portion and then quite straight through- 

 out the anterior third. It is not bulged out at the equator. The 

 equator is obscurely marked by an obtuse angle. The anterior aper- 

 ture is slightly flattened into a rounded oval outline. The apical 

 orifice is relatively large, round, and thickened within. The color is 

 cream white or ivory, instead of the bluish white usual in the Caduli. 

 157582°— 20 8 



