10G3 



0tm6 XXXIII. 



DENTALlUM.t 



SHELL UNIVALVE, TUBULAR, NEARLY STRAIGHT, 

 WITHOUT ANY INTERNAL PARTITION, AND OPEN 

 AT BOTH ENDS. 



RECTUM. 1. Shell nearly straight, longitudinally 

 ribbed, and slightly striated transversely ; 

 and somewhat annulated. 



Dentalium rectum. Gmelin, p. 3738. 



Deiitaliiim, No. 2. Schroeter Einl. ii. p. 527. 



Le grand Dentale a stries longitudinales. Favanne, i. p. 

 638. t. 5. f. E 6. 



Fetiver Gaz. t. 95. f. 11. Gualter, 1. 10. f. H. Martini, 

 i. p. 30. t. 1. f. 4 A. 

 Inhabits the East Indian Seas. Favanne. 

 This shell is of about the same size as D. elephantinum, and 



principally differs from it in being nearly straight, and in 



having the ribs smaller, and the growth marked by irregular 



elevated rings ; it is green with the annulations of a darker 



colour, and is rather a doubtful species. 



ELEPHANTINUM. 2. Shell slightly curved, with 

 about ten longitudinal ribs, and intermediate 

 striae. 



Dentalium elephantinum. Linnceiis Sj/st. Nat. p. 1263. 

 Martini, i. p. 33. 1. 1. f. 5 A. Born Mas. p. 431, and 



t D. nebulosum of Gnielin, p. 3738, appears to me to be too uncertain a 

 species to be retained ; and the following are fossils, D. annulatiim, p. 3738, D. 

 /ossile, p. 3738, D. interruptum, p. 3739, D. Radula, p. 3738, D, sexangulum, 

 p. 3739, and D. vitreum, p. 37 39. 



2 I 2 



