168 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Strongly compressed laterally, and readily distinguished by the 

 circular sculpture. It is named in honor of Mr. Silas L. Schumo, who 

 collected the material. 



Dentalium (Khabdus) sp. undet. 



Numerous fragments of a slowly tapering species, circular in section, 

 glossy, and very thin throughout, occur in the Bowden beds. The 

 largest measures 3.6 mm. in diameter. The thinness of the entire 

 tube and the circular section of the smaller end readily distinguish the 

 species from D. dissimile Guppy, but the fragments at hand are too 

 imperfect for definition of the species. 



Cadulus depressioollis Pilsbry and Sharp. 



Proc. Acad. N. S. Phila., 1897, p. 473, pi. 11, figs. 25-27. 



Characteristic fragments of this species, originally described from 

 Santo Domingo, are found in the Bowden beds. 



Cadulus dentalinus (Guppy). 



Pilsbry and Sharp, Manual of Conchology, XVII, p. 190, pi. 36, figs. 21, 22.' 



Bowden beds, abundant. This is the type locality. Specimens 

 received from Mr. Guppy have been figured in my volume on recent 

 Scaphopods, where the relationships of the species are discussed 

 (I. c, pp. 188-190). 

 Cadulus annulatus n. sp. 



Rather a large, slender species of the group of C. dentalinus. The 

 swelling is only slight and near the anterior end; tube subcircular in 

 section, a trifle flattened on the convex side at the oblique aperture; 

 sculpture of very fine, close, oblique wrinkles throughout. The 

 length is about 1\ mm., greatest diameter 1 mm. 



Bowden, Jamaica. 



This species is represented by imperfect specimens only. It may 

 be recognized by the very fine wrinkles and slight swelling. 



Cadulus sp. undet. 



A Cadulus, of the subgenus Polyschides, occurs in the Bowden beds, 

 but only fragments are in the collection. There are several species 

 belonging to the same group in the Eocene and Oligocene of the 

 southern United States. 



Cadulus simrothi n. sp. Fig. 3. 



Shell minute, smooth, slightly arcuate, biconic, strongly swollen in 

 the middle, rapidly tapering toward both ends, produced in a short 

 tube posteriorly; greatest diameter contained about 2 J times in the 

 length of the shell. Outline of the most convex side irregular, the 

 contours being but slightly convex above and below the "equator," 



