K. J. Bush — Mollusca of Cape Hatteras. 41 1 



mon, or yellow, gradually shading into white towai'd the anterior end. 

 Very yonng specimens are white, very thin and glassy. 



Length, srs""™; diameter of anterior aperture, 2'""'; of i)osterior 

 aperture, about -5™™. 



Common in V to 48 fathoms. 



Cadulus Carolinensis Bush. 



Report U. S. Com. Fish and Fisheries, p. 85, for 1883, 1885. 

 Plate XLV, figure 19. 



Shell of medium size, semi-transparent (perfectly fresh specimens 

 are almost transparent and glassy, showing the animal quite dis- 

 tinctly) very glossy, white, circular throughout its entire length. 

 Greatest diameter at about the anterior third, diminishing slightly to 

 the round, very oblique, anterior aperture, and backward to the pos- 

 terior end, at first very gradually and farther back very rapidly. 

 Curvature well marked in some specimens, very slight in others, 

 nearly uniform dorsally, but ventrally, most decided in the posterior 

 third. Posterior aperture very small, round, a little oblique, with 

 four small, distinct notches, two on each side. 



Length, 9-5™'" ; greatest diameter, about 2'"™ ; diameter of anterior 

 aperture, 1™" ; posterior aperture, -4'°™. 



Very abundant in 7 to 48 fathoms. 



Cadulus incisus, sp. nov. 



Plate XLV, figttre 20. 



Shell rather small, slender, somewhat cylindrical, slightly con- 

 tracted dorsally, just back of the anterior aperture, tapering and 

 curving gradually from about the middle toward the posterior end. 

 It is thin, semi-transparent and very lustrous. The anterior aper- 

 ture is oval, and a little oblique ; the posterior aperture is very ob- 

 lique with four narrow, very deep notches, two on each side, forming 

 four conspicuous points on the end of the shell. 



Length of largest specimen, 8'""" ; diameter anterior aperture, 

 1™™ ; posterior aperture, -5°"°. The other specimen is smaller and 

 more slender, measuring 7'""' in length ; with the anterior aperture 

 'S""" in diameter and the posterior less than -5""". 



Trans. Conn. Acab., Vol. VI. 59 June, 1885. 



