\5Q PHOLAS. PIERCE-STONE. Class VI. 



GENUS III. PHOLAS. PIERCE-STONE. 



Animal, an Ascldia. 



Shell, two large valves open at each end, with 



several lesser shells at the hinge. 

 Hinges folded back, united with a cartilage. 

 Tooth incur vated in the inside beneath the 

 , hinge. 



1. DActy- Ph. Lin. Syst. 1110. Gm. Lin. Tr. viii. 30 



LUS. 



dactyle. 



Lin. 3214. Faun. Suec. Mont. Test. Br. 20, 



No. 2124. List. Angl. App. 

 tah. xi. Jig. 3. 



Ph. with an oblong shell, marked with echi- 

 nated stria ; the tooth broad ; the space above 

 the hinge reflected, and cancellated beneath; 

 breadth four inches and a half; length one inch 

 and a quarter. Tab. xlii. jig. 1. 



2. Candida. Ph. Lin. Sysf. nil. Gm. Lin. Tr. viii. 31. 



whlte - Lin. 321.5. List. Angl. tab. Mont. Test. Br. 24. 



v- Jig- 39- 



Ph. with a brittle shell, and smoother than the 

 former ; the tooth very slender ; breadth an inch 



