GINGLYMACONCHA. PINNAD&. . jaar 
Pinna muricata, Donov. Brit. Shells, t. x. 
Pinna muricata, Turt. Conch. Dict. 149? 
Var. 3. The ribs with their spines reflexed, but not concave ; 
the epidermis flesh-coloured, behind deep flesh-coloured. 
Var. 6. The ribs smooth, without spines ; the epidermis horn- 
coloured, flesh-coloured; behind purple, inclining to blue, 
greenish or deep flesh-coloured. 
Inhabits the sea on the coasts of Devon and Cornwall, the 
southern coasts of Ireland and Wales, and the Dorsetshire 
coast in very deep water on sandy bottoms. 
Genus 64. Monp1o.ua. 
Shells ventricose, nearly transverse, equivalved, regular, 
slightly winged, anteriorly gradually compressed ; the valves 
connected above as far as the middle of the wing; the um- 
bones nearly terminal and incumbent : the elastic cardinal liga- 
ment is somewhat internal, received in a canal of the margin, 
but not reaching the middle of the wing, one securiform, nearly 
lateral, muscular impression. The foot very large, elongate- 
oval. 7 
* Shell smooth, hinder side winged. 
1. MopioLaA PAPUANA. 
Shells with their valves covered with a fuscous or whitish 
violaceous epidermis ; under the epidermis and inside whitish ; 
the anterior side distinctly smuated; the hinder side with a 
rounded wing. Length seven inches; height three and a half 
inches. 
Mytilus papuanus, D’ Argenv. Conch. t. xxii. f. c. 
Mytilus modiolus, Lister, Conch. t. ecclix. f. 128; Gualt. 
Test. t. xci. f. H.; Linn. Syst. Nat. 1158. no. 256; Knorr. 
Vergn. iv. t. xv. f. 3; Favanne, Conch. t.\. f. B.; Penn. 
Brit. Zool. iv. 113. t. Ixvi. f. 77 ; Da Costa, Brit. Conch. 
21954. xv. f..5;. Chem. Conch. vii. 219. t..xv. f. 5 3 -Pult. 
Cat. Dorset. 38; Brug. Encycl. Méth. t. ccxix. f. 1 ; Donov. 
Brit. Shells, t. xxi. ; Mont. Test. Brit. 23; M. § R. Trans. 
