23 



*L. RADULA. Tellina Radula. Mont. Test. Brit., vol. I, 



p. 68. pi. 2, fig 1, 2. Lucina R. Flem. Brit. An., p. 441. 



Montagu found it in abundance at Falmouth; and I have 

 obtained it on the east coast. 

 L. FLEXUOSA. Tellina F. Mont. Test. Brit., vol. 1, 



p. 27. Lucina F. Flem. Brit. An., p. 442. 



Montagu says " It is abundant in the sand of Falmouth 

 harbour; it is less common in other districts. 

 L. PISIFORMIS. Cardium Discors, Mont. Test. Brit., 



vol. 1, p. 84. L P. Flem. Brit. An., p. 442. 



Montagu says " we hesitate to determine this shell to 

 be actually English, having only found one dead specimen 

 in sand at Falmouth, taken from the harbour." 

 L. ARCUATA. Cardium A. Mont. Test. Brit., vol. I, 



p. 85, pi. 3, fig. 2. Lucina A. Flem. Brit. An., p. 442. 



" We found this elegant species in Falmouth harbour, 

 dredged, up with sand for manure; but not common." 

 Montagu. 

 L. LACTEA, Telina L. Lin. Mont. Test. Brit,, vol, J, 



p. 10, pi. 2, fig. 4. Loripes Lacteus, Flem. Brit. An.,. 



p. 430. Scarcely uncommon, 



DONAX. 

 GENERIC CHARACTER: Shell transverse, equal valved, 

 unequal sided ; anterior side very short and obtuse. Two 

 cardinal teeth either in both valves, or only in one; one 

 or two lateral teeth, more or less distant. Ligament short,, 

 external, inserted in the place occupied by the lunula. 

 This genus is characterized by its rather flattened, and 

 almost triangular shell, and by having at the hinge, beside 

 the cardinal teeth, one or two rather distant lateral teeth,- 

 separated from the cardinal teeth, and analogous to the 

 lateral teeth of the Mactrse, Succinese and Tellinae. The liga- 

 ment of the Donaces and Tellinae, is always on the shortest 

 side of the shell, but in the Veneres and Cythereae, it is on 

 tbe longest. Tbe Donax has not the flexuous fold of the 

 Tellina. Journal of Science, vol. 14, p. 307. 



* D. TRUNCULUS. Turt. Lin. Pen. Br. Zo., vol. 4, pi. 

 55, fig. 45. Mont. Test. Brit., vol. 1, p. 103. Flem. 

 Brit. An., p. 433. On some part of the coast this is rare ; 

 but it is found at Par in abundance. 



D. DENTICULATA. Turt. Lin. Pen. Brit. Zo., vol. 4, 

 pi. 55, fig. 46. Mont. Test. Brit., vol. 1, p. 104. Stew. 

 Elem., vol. 2, p. 378. Flem. Br. An., p. 433. This is 

 inserted on tbe authority of Da Costa ; neither Montagu 

 nor myself having ever found a specimen. 



* D. COMPLANATA. Mont. Test. Brit., vol. 1, p. 106. 



Flem. Brit. An., p. 434. Rare. Montagu found it at 

 Falmouth and Looe ; and among a collection of small shells 



