GINGLYMACONCHA. PECTINID. 347 
mach of the cod, Gadus Morrhua, taken on the northern 
coasts. 
I have carefully compared Montagu’s specimen of his Pecten 
obsoletus and levis, both of which he had placed together in 
one tray, each with its own ticket ; and can discover no other 
distinctions than those of size and colour. 
Genus 79. Lima. 
Lima, Bruguiére, Lamarck, Cuvier. 
Ctenoides, Klein. 
Shells nearly equivalve, auriculated between the valves on 
the side slightly gaping; the umbones divaricating ; the m- 
ternal linings or walls bending downwards towards their out- 
sides ; the hinge toothless ; the cardinal foveola or excavation 
which receives the ligament is partly external. 
The margins of the mantle are not fringed. 
i. Lima LoscomMBEa. 
Shells somewhat pellucid, with concentric elevated striole 
and vertical strize ; the lower interstices elevated and forming 
ribs ; the epidermis white. Height half an inch. 
This new species was discovered by Loscombe, Esq. 
in deep water, in Torbay on the coast of Devon, to whom I 
am indebted for the specimens from which this description was 
taken. In his collection is preserved a specimen of the animal 
in spirits of wine. 
2. LIMA RETICULATA. 
Shells vertically ribbed; the interstices with clevated lines 
and concentric elevated strize, forming a network ; the epider- 
mis white. 
Pecten fragilis, Mont. Test. Brit. Supp. 62; Flem. Edinb. 
Encyel. vii. 98. 
Ostrea fragilis, Turt. Conch. Dict. 62. 
This very rare species is sometimes found on the southern 
and western coasts of Devon: I since found a single valve by 
