EUCHELUS. 445 



5, very rapidly increasing, the nuclear one smooth, the remainder 

 clathrate with strong spiral ribs crossed by elevated, close, vertical 

 stride, which crenulate the ribs and cut the interstices into pits. 

 There are 3 stronger spirals ou the penultimate whorl, with a riblet 

 in each interval ; on the earlier whorls there ai-e only 3 spirals; the 

 last whorl at its termination has about 27 spirals ; the base has about 

 8, alternating in size ; there is a strong sjMral bordering the closed 

 umbilicus ; aperture large, expanded, slightly sulcate inside, quite 

 oblique ; columella simple, concave flattened, and above reflexed, 

 connected with the upper margin of peristome by a short shining 

 parietal callus. Alt. 8, diam. 9 mill. 



Sinc/apore (Archer). 

 "E. edentulus Reel." in Phil. Acad. Coll., not E. edentulm A. 

 Adams, P. Z. S. 1851. 



A form allied to E. foasxdatus and cancellatm, but with closed 

 umbilicus, reflexed columellar edge, and difl^ering in some details of 

 sculpture. I cannot learn that Recluz ever described this shell, but 

 the specimens before me bear his name. 



E. DELPRETEi Caramagna. PI. 51, figs. 8, 9. 



Shell conic-depressed, umbilicate, rather thick, whitish, sub- 

 vitreous; apex obtuse; first 3 whorls planate above, elegantly orna- 

 mented with elevated spiral ribs and longitudinal stride; first whorl 

 nearly smooth ; the last double as long as the spire, tumid, dih\ted, 

 ornamented with 3 elevated cinguli on the lower part, 2 less ele- 

 vated ones above ; base with 6 granulose, minutely striated, con- 

 centric cinguli ; lip thin, denticulated by the external sulci ; colu- 

 mella smooth, straight, excavated at base, scarcely forming a denticle; 

 aperture white, oblique, sulcate within. 



Alt. 4. diam. 4 mill. ( Caramag.) 



Assab, West Shore of the Bed Sea. 



E. Del Pretei Caramagna, Bull. Soc. Mai. Ifal. xiii, p. 131, t. 8, 

 f. 9, 1888. • 



Section Herpetopoma Pilsbry. 

 E. scABRiuscuLUS Adams and Angas. PL 38, fig. 12. 



Shell small, very minutely perforate, thick, conoidal, ashen- 

 reddish ; whorls 5, separated by canaliculate sutures, convex, the 

 embryonic ones smooth, the rest roughened, spirally cingulate, 

 cinguli 4 on the penultimate whorl, unequal, the upper two smaller, 



