114 



BULLETIN 111, UNITED STATES NATIONAL MUSEUM. 



age of 8 to 9 mm. in length, and they are, besides this, proportionally 

 somewhat stouter and more inflated. Another difference lies in that 

 the equator is more median in O. 'parvus. 



The type, Cat. No. 95377 (a), U.S.N.M., was taken by the Blake, 

 United States Coast Survey Station not given, off Barbados, in 100 

 fathoms. 



A Yucatan specimen of C. parvus, from the great depth of 1,002 

 fathoms, can be explained by the steepness of the Yucatan continen- 

 tal slope and the likelihood of finding dead mollusks belonging to 

 shallower stations that have been swept out to greater depth. A 

 number of the Barbados specimens are slightly smaller than the type, 

 and may indicate a sexual character, as the Barbadian lots often con- 

 tain examples of both. At all events, I do not believe the slightly 

 smaller shells are separable from the others, even subspecifically. 



The following are the museum collection records : 



Locality. 



Barbados, U. S. C. S. Station ? 



Fowey Light, Florida, Eolis Station 356 



Fowey Light, Florida, Eolis Station 354 



Fowey Light, Florida, Eolis Station 155 



Fowey Light, Florida, Eolis Station 364 



Fowey Light, Florida, Eolis Station 176 



Fowey Light, Florida, Eolis Station 350 



Key West, Florida, Eolis Station 384 



Off Cape San Antonio, Blake Station 



Barliados, Iowa State University Station 3. . 

 Barbados, Iowa State University Station 13. 

 Antigua, Iowa State University Station 115. 

 Barbados, Iowa State University Station 27 . 

 Barbados, Iowa State University Station 61 . 

 Barbados, Iowa State University Station 44 . 



Remarks. 



100 fms. 

 55 fms. 

 80 fms. 

 43 fms. 

 75-90 fms. 

 52 fms. 

 70-90 fms. 

 75-80 fms. 

 1,002 fms. 

 75-80 fms. 

 80 fms. 

 120 fms. 

 85-90 fms. 

 33 fms. 

 90-100 fms. 



I Type. 

 CADULUS (PLATYSCHIDES) FOWEYENSIS. new species. 



Plate 18, figs. 7, 13. 



The shell is slender, slightly curved, very slowly enlarging from a 

 comparatively large apical opening to the maximum section located 

 one-fifth distance from the anterior aperture, thence it tapers mod- 

 erately the remaining short distance to the relatively small con- 

 tracted and obUque aperture. The shape is that of a long-necked 

 large-mouth flask. The convex side is almost straight throughout 

 its posterior half, and thence evenly arched to the aperture, only show- 

 ing a slight prominence at the equator, just back of the anterior aper- 

 ture. The concave side, on the contrary, is almost straight in its 

 anterior half and thence evenly arched the balance of the way to the 

 apical orifice. There are numerous opaque rings about the shell, 

 especially near the posterior end, each ring being a slight thickening 

 of the shell. The apical opening is wide and rather flaring, a very 



