155 



TEREBRATULA platyloba. 



TAB. CCCCXCVI.—^g^s. 5 and 6. 



Spec. Char. Transversely obovate, depressed; front 

 elevated, with several acute plaits in the middle 

 of the sinus ; sides with one or two obscure 

 plaits upon their edges. 



Almost twice as wide as long, and much depressed ; 

 several obtuse ribs proceed from the plaits in the edge of 

 the front to a greater or less distance towards the beaks 

 in various individuals : they are not much elevated. The 

 sinus in the front almost divides it into two lobes. 



The only specimens I have seen of this species are 

 from Clitheroe : they enrich the collection of Charles 

 Stokes, Esq., to whose liberality I am much indebted. 



TEREBRATULA Pugnus 

 TAB. CCCCXCVII. 



Spec. Char. Obovato-deltoid, rather depressed; 

 front much elevated, with from four to six 

 plaits in the middle of the sinus ; sides convex, 

 with several plaits upon their edges. 



Syn. Conch. Anomites Pugnus. Martin, Pet. Derb. 

 PL 22, Jigs. 4 and 5. Si/st. Arr. P. 13. 



From the marginal plaits in the middle of the sinus a 

 few furrows generally extend some way into the shell, 

 and sometimes reach nearly to the beaks ; otherwise the 



