i68 Mr. William Wood's Ol>fervaUons on the 



Tab. XVII. Fig. 9, 10. 

 The Venus exoleta is provideJ with three large teeth 

 in each valve, one of which is double. This fhell 

 has the rudiment of a fmall tooth feated at the 

 bale of one of the largeft, on the fide next the cor- 

 diform deprefTion, and in the valve oppofite to that 

 which contains the lateral double tooth. 



decujata. Linn. Syft. Nat. ed. Gmel. I. p. 3294. Da Cojl. Br. 



Conch, p. 202. /. 14./. 4. 4- Lift. Conch, t. 423./ 271. 

 Gaulu Tejl. t.%s-f'L. 



Tab. XVII. Fig. 11, 12. 

 This fhell has two grooved teeth in one valve, befides 

 a plain one. Thefe teeth receive another between 

 them, from the oppofite valve, which is likewife 

 grooved, and has for its companions a fmall plain 

 tooth on one fide, and the appearance of a tooth 

 on the other. Young fhells have three teeth in 

 each valve. The intermediate one is conftantly 

 cleft, the others plain ; at leafl, in all the fpecimens 

 which I have met with. 



cmp. Linn. SyJ.Nat. ed. Gmel.i.p. 3288. Penn.Br.Zoo/. No. 28, 



/. 48. / 28. Da CoJl. Br. Conch, p. 194. /. 13^ / 4. 

 righi hand. Ll/i. Conch, t. 299. /. 1 36. 



Tab. XVII. Fig. 15, 16. 



Although we have high authority for placing this 



fliell among the Veneres, yet we find it in the Britifh 



Zoology ranked among the TtUina:', and, indeed, 



8 i/ 



