NAUTILUS. 347 



Inhabits the sea-shore at Sandwich, and Seasalter, Kent, very 



rare. Walker. 

 Shell minute, whitish, transparent like glass. 



obliquus. 22. Shell nearly straight, with a slight 

 curvature ; joints obliquely striated. 



Nautilus obliquus. Lin. Syst. Nat. p. 1163. Schroeter 

 Einl. i. p. 15. Gmelin, p. 3372. 



Nautilus jugosus. Montagu Test. p. 198. t. 14. f. 4. Ma- 

 ton and Racket, in Lin. Trans, viii. p. 119- 



Gualter, t. 19- f. N. Martini, i. Vign. 1. at p. 1. f. Hand h. 

 Inhabits the Adriatic and Mediterranean Seas. Linnceus. 



Shores of Great Britain. Montagu. 

 Shell minute, white, pointed, in form rather like Dentalium 



Entalis, but jointed and contracted at the partitions ; aperture 



extended to a small central conical syphon. Mr. Montagu's 



description leaves but little doubt that his N. jugosus is at 



most only a variety of this species. 



raphanistrum. 23. Shell straight, sub-cylindrical; 

 joints swollen with twelve elevated striae ; sy- 

 phon central, regular. 



Nautilus Raphanistrum. Linnceus Syst. Nat. p. 1163. 



Schroeter Einl. i. p. 15. Gmelin, p. 3372. 

 Ledermuller Micros, t. 4. f. X, lower figure. 



Inhabits the Mediterranean. Linnaeus. 



Linnaeus says this species is the length of a nail, and is the 

 largest of the minute Nautili. It differs from N. Raphanus 

 in the number of the stria?, in size, in having a regular Sy- 

 phou, and in being only slightly attenuated towards the sum- 

 mit. 



raphanus. 24. Shell straight, attenuated, with 

 swollen joints, and seventeen elevated striae ; 

 syphon sub-lateral and oblique. 



Nautilus Raphanus. Linnceus Syst. Nat. p. 1 1 64. Schroe- 

 ter Einleitung, i. p. 1 6. Gmelin, p. 3372. 



Orthocera raphanoides. Lamarck Syst. des Anim. p. 103. 



Planous, t. l.f. 6. Gualter, t. 19- f- L. M. Da Costa 

 Elements, t. 2. f. 12 and 13. Martini, i. Vign. at p. 1. 

 f. A and B. 



