EAST AMERICAN SCAPHOPOD MOLLUSKS. 



The following are the museum records: 



51 



Num- 

 ber of 

 speci- 

 mens. 



Cat. No. 



U.S.N. M. 



3143S2 



314383 



314384 



314385 



314386 



3143S7 



314388 



314389 



314390 



323958 



62651 



95326 



95329 



95328 



95370 



94107 



95327 



161571 



108164 



314892 



314893 

 314894 

 314895 

 314896 

 314897 



Locality. 



Southeast of Sand Key, Florida, Eolis Station 6.. 



()1TS;in(l Kev, Florida, Eolis Station 327 



OifSanil ICi'v, Florida, BoZi« Station 100 



OIT Sand ICov, Florida, £:o//s Station 300 



OIT Sand Kev, Florida, Eolis Station 338 



OIT SaiKl Key, Florida, Eolis Station 326 



Off Sand Key, Florida, Eolis Station 3 



Key West, Florida, Eolis Station (;3 



Off Western Dry Rocks, Eolis Station 319 



Off San Bias, U. S. B. F. Station 2404 



Off Mouth Mississippi River, Blake Station 47. . . 



Off Habana, Cuba, Blake Station 2 



Off Habana, Cuba, Blnke Station 57 



Off Morro I-ight, Habana, Blake Station 101 



Off Morro Light, Habana, Blake Station 100 



South of Cuba, U. S. F. C. Station 2135 



Yucatan Bank, Blake Station 36 



Mayaguez, Porto Rico, U. S. B. F. Station 6067. . 

 Off Fernandina, Florida, U. S. B. F. Station 2668. 

 Antigua, off English Harbor, S. U. I. Experi- 

 ment Station 115. 



Barbados, S. U. I. Expedition Station 48 



Barbados, S. U. I. Expedition Station 67 



Barbados, S.U.I. Expedition Station 13 



Barbados, S. U. I. Expedition Station (?) 



Barbados, S. U. I. Expedition Station 10 



Remarks. 



35 fms., s. brk. sh. 



85 fms. 



65 fms. 



72 fms. 



85 fms. 



75 fms. 



69 fms., s. brk. sh. 



78 fms. 



90 fms. 



t)0 fms., gy. s. 



321 fms., 46.75°. 



805 fms., 39.75°. 



177 fms. 



200 fms. 



400 fms. 



250 fms. 



84 fms. 



97 fms. 



294 fms. 



120 fms. 



hrd. C. 



46.3°, gy. s., dd. ( ( 



80 fms. 

 50-60 fms. 

 80 fms. 

 Deep. 

 100 fms. 



' Type.. 

 DENTALIUM (ANTALIS) CERATUM FLAVUM, new subspecies. 



Plate?, fig. ]. 



The shell, like the typical subspecies, is awl-shaped, slightly 

 curved, chief curvature being in the extreme posterior portion; the 

 tip is very short, rapidly increasing in diameter and giving a thickened 

 appearance to the posterior portion of the shell, when it is retained. 

 The color is a bright yellow, becoming less intense in the senescent 

 fourth of the shell, but often persisting even to the aperture. In some 

 specimens reddish splotches are noticeable. There are 12 to 14 rib- 

 lets beginning upon the early portion of the nine-angled tip ; these may 

 be later increased somewhat by further intercalation of less promi- 

 nent secondary riblets, and all finally become evanescent and dis- 

 appear at about the middle portion of an adult shell, the anterior half 

 being smooth and highly polished. The intercostal spaces are retic- 

 ulated by a very delicate microscopic sculpture more apparent in the 

 first quarter of the shell. This reticulation, along with the riblets, 

 finally disappears, as all the sculptural features merge and fuse into 

 a smooth surface. A shallow, broad notch on the convex side is a 

 probable apical feature, though not often noticeable. 



The type. Cat. No. 314391, U.S.N.M., measures— length, 26.5 mm.; 

 diameter, 2 mm. It was dredged off Key West, Florida, in 110 

 fathoms, being Eolis Station No. 333. 



This is a subspecies chiefly of the Florida Keys region, occurring 

 just within the line of the Gulf Stream. It differs from Dentalium 



