Cl. VI. MACTRA. FLAT-SIDED COCKLE, 195 



Lin. Tr. viii. 72. Mont. Test. Br. 99. t. 3./. 5. 9. triangu- 



LAMS. 



* M. with a somewhat triangular shell; one 

 strong forked hinge -tooth in one valve, on the 

 other a triangular depression between two small 

 teeth; minute. 



Inhabits the south coast of Devonshire. 



Lin. Tr. viii. 72. ib. vi. Mont. Test. Br. 98. t. 3. 10. boysii. 



t. 18. /, 9- 12. /• 7- 



* M. with a smooth ovate shell ; hinge-tooth 

 strong, a little prominent; size of a horse- 

 bean. 



Found in Salcombe and Biddeford bays ; also 

 in Kent. 



,in. Syst. 1126. No. 101. 



Zisf. .4wg/. ta&. iv. 



11. LUTRA' 



Gm. Lin 3259. 



M 19- 



RIA. 



large. 



'awn. 5«ec. No. 2128. 



Zzra. TV. viii. 73. 





-Mow*. 7Vs/. 5r. 100. 





M. with an oblong thin shell ; one side much 

 extended, and gaping; for which reason Lin- 

 nceus once placed it among the My&. Breadth 

 five inches ; length two and a half. 



Inhabits the sea near the mouth of rivers; 



o 2 



