94 MYA. 



SPOON-HINGE GAPER. 

 PL 24./. 7, 8, 9. Mr. Sowerby. 



5. Mya praetenuis. M. testa ovata, planiuscula ; cardinis dente cochlear^ 



formi. Linn. Trans. 8. p. 37. 

 Shell oval and flattish ; hinge with a spoon-shaped tooth. 

 Chama praetenuis. Petiver Gazoph. t. 94. f. 4. 

 Donov. Brit. Shells, t. 176. Pult. in Hutch. Dorset, p. 28. t. 4. f. 7. 



Mont. Test. Brit. p. 41. pi, 1. f. 2. 



This delicate species was first noticed by Petiver. 

 It is oval, thin, brittle, and flat ; of a whitish colour, 

 and gaping behind ; a few scarcely visible concentric 

 striae mark the outside of the shell ; the inside is white, 

 with a broad, hollow, spoon-shaped tooth in each valve. 

 Large specimens are an inch long, and an inch and a 

 half broad. 



Dr. Pulteney found this shell on the sands in Poole 

 Harbour, and on the north shore near Brownsea Isle. 

 He also collected a few valves on the shore between 

 Weymouth and Portland. According to Mr. Montagu, 

 single valves are not uncommonly dredged in Falmouth 

 Harbour, and perfect shells have been taken on the 

 south coast of Devon. 



DUCK GAPER. 



6. Mya anatina. M. testa globosa, nivea, pellucida; cardinis dente pri- 

 mario prominente, rotundato. Linn. Gmel. p. 3221. 



Shell globular, very white and pellucid ; primary tooth of the hinge 

 prominent and rounded. 



Adanson Seneg. pi. 19. f. 2. (Tugon,)Chemn. Conch. G. t. 3. f. 17, 18. 

 Encyclop. Method, pi. 229. f. 3. a. b. 



A thin but firm shell, of a round shape, gaping wide 



