11)8 



This fpecies appears to be fubjetl to very confiderablc 

 ■variation, with refpeft to the fliape of the extreme joint 

 at each end, as well as in the number : in fome the aper- 

 ture is extended to a conic point; in others it is only a 

 fmall, round opening on the extreme articulation, which 

 is globofe : the fmaller end in fome, is rounded ; in others, 

 conic, pointed. 



14. 

 SuBARcuATus. N. with 3. fub-cvHndric, fub-arcuated fhell, with three 

 Tab. 6. f. 5. confpicuous, globofe articulations at the larger end : the 

 remaining joints fcarcely defined : aperture a fmall, pro- 

 duced y>'/' Aon ; colour pellucid, gloffy white, fometimes 

 covered with a brown epidermis. Length one tenth of 

 an inch. 



Mr. Boys favoured us with fpecimens of this fhell from 

 Sandwich, and with them a drawing of what we confider a 

 variety, differing only in having ten dilHnft articulations ; 

 the extreme one at the fmaller end longer than either of 

 the others, except the anterior one, in which the aper- 

 ture is placed. 



15. 



JuGosus. Nautilus obllquus. Gnid. Syfl. p. S372. 14 ? 



Tab. 14. f. 4. Turt. Lin. p. 308 l—Gudt. t 19. N ? 



Martini Conch, i. vi'jr. i. f. H. h ? 



N. with a fub-arcuated, fub-cylindric fhell, a little ta- 

 pering: with nine, ridged, fub-globofe articulations : aper- 

 ture extended to a fmall conic fyphon: the extreme joint, 



at 



