EAST AMERlCAiSr SCAPHOPOD MOLLUSKS. 121 



some other National Museum specimens, clearly appear to belong 

 to a PJatyschides type, as shown in C. pandionis; that is, two 

 "chipped out" notches, dorsal and ventral, leaving two lateral lobes 

 low and ill defined. 



Measurements are: 



Length, 13 mm.; maximum diameter, 2.9 mm.; minimum diameter, 

 2.25 mm.; anterior aperture, 1.5 mm.; apical aperture, 0.6 mm. (type). 



Length, 14.3 mm.; diameter, 2 by 2.25 mm.; anterior aperture, 1 by 

 1.25 mm.; apical aperture, 0.6 mm. (Old Providence.) 



The type is in the Museum of Comparative Zoology collection. 

 Cat. No. 7742, collected by the Blake off Cape San Antonio, Cuba, 

 in 413 fathoms. 



The only museum lot consists of five specimens. Cat. No. 94054, 

 U.S.N.M., collected at the U. S. B. F. Station 2150, off Old Provi- 

 dence Island in 382 fathoms, bottom of white coarse sand, tempera- 

 ture 45.75° F. 



This Cadulus is one of the agassizii, rushii, pandionis group, but is 

 larger than any of those species. It is very highly polished and 

 likely belongs to the deeper Antillean continental slope zone. 



CADULUS (PLATYSCHIDES) VULPIDENS Watson. 



Plate 18, fig. 8. 



1879. Cadulus vulpidens Watson, Journ. Linn. Soc. London, voL 14, p. 524. 

 1885. Cadulus vulpidens Watson, Challenger Rep. (Scaphopoda), p. 18, pL 3, fig. 2. 

 1898. Cadulus (Gadila) vulpidens, Pilsbry and Sharp, Tryon'sMan. Conch., voL 

 17, p. 172, pL 25, fig. 51. 



The shell resembles the canine tooth of a carnivore, long, sharp, 

 bent; obliquely swollen, the equator on convex side is at the anterior 

 fourth and on the concave side at about the anterior third. The 

 shell contracts more rapidly from equator to mouth. The curvature 

 is greatest near the apical end. The aperture is oblique, its peristome 

 sharp. The apical orifice is round, the edge "slightly gnawed," 

 projectmg a little on the convex curved side. Measurements are: 



Length, 8.75 mm.; diameter, 1.79 mm.; anterior aperture, 0.9 mm.; 

 apical aperture, 0.75 mm. (Watson). 



The type is in the British Museum and was dredged by the 

 Challenger off Culebra Island in 390 fathoms. 



I have seen no authentic specimens. None of the lots in the Na- 

 tional Museum collection tentatively assigned to this species seems 

 quite to agree with Watson's figure or description. The oblique char- 

 acter of the equator is seeming rather than actual; this is caused by the 

 obliqueness of the aperture. Neither is the shell actually "bent," 

 but only appears to be so by reason of the obtusely angled equator, 

 which is more prommently noticeable on the convex side. 



