\56 



PHOLAS. PIERCE-STONE. Class VL 



GENUS III. PHOLAS. PIERCE-STONE. 



Animal, an Ascidia. 



Shell, two large valves open at each end, with 



several lesser shells at the hinge. 

 Hinges folded back, united with a cartilage. 

 Tooth incurvated in the inside beneath the 



hinge. 



1. DACTY- Ph. Lin. Syst. 1110- Gm. 

 LUS. ^^K. 3214. Faujt. Suec. 



('- y ^- jy^_ 2124. List. Angl. App. 



tab. xi. Jig, 3. 



Lin. Tr. vili. 30. 

 3IonL Test. Br. 20, 



Ph. with an oblong shell, marked with echi- 

 nated strice ; 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. liYn. Jig. 1. 



2. CANDIDA. 



white. 



Ph. Lin. Syst. 1111. Gm. 

 Lin. 321.5. List. Angl. tab. 

 V. fig- 39- 



Lin. Tr. viii. 31. 

 Mont. Test. Br. 24. 



Ph. with a brittle shell, and smoother than the 

 former ; the tooth very slender ; breadth an inch 



