312 GINGLYMACONCHA. VENERIDA, 
finely concentrically striolated ; with a groove extending from 
the umbones to their inferior aspects; the epidermis snowy 
white. Length and breadth three-eighths of an inch. 
Tellina flexuosa, Mont. Test. Brit. 72; M.& R. Trans. Linn. 
Soc. vii. 56; Flem. Edinb. Encycl. vii. 91; Wood, Gen. 
Conch. 1. 188. t. xlvi. f. 1,8; Dill. Desc. Cat. 188; Turt. 
Conch. Dict. 177. 
Thyasira flexuosa, Leach, Lam. Hist. Nat. des dnim. sans Vert. 
v. 492. 
Amphidesma flexuosa, Lam. Hist. Nat. des Anim. sans Vert. 
v. 492. 
This species is found on the western and southern coasts of 
Devon and the southern coasts of Ireland in deep water on 
sandy bottoms. 
STIRPS VIII. 
Shells subcordate ; the cordiform impression perfect; the 
umbones nearly central, prominent, and anteriorly curved; no 
lamella before and behind the cardinal teeth. 
Genus 55. AMPITHZA. 
1. AMPITHZA EXOLETA. 
The shells sculptured with narrow, concentric grooves, which 
are roughish ; the epidermis whitish, more or less radiated with 
pink and red. Length and height two or three inches. 
Venus exoleta, Lister, Conch. t. eexci. f. 127. cexcii. f. 129 ; 
Petiv. Gaz. t.xcii. f.15; Gualt. Test. t. xxv. f. F.; Born. 
Test. t. v.f. 9; Linn. Faun. Suec..2145;, Syst. Wor eae 
2134. no. 142; Favanne, Conch. t. xlvim. f. F. 1.; Chem. 
Conch. vii. 18. t. xxxviii. f. 102-104; Sehroét. Hinl. wi. 
142; Brug. Encycl. Méthod. t. cclxxix. f. 5; Pult. Cat. 
Dorset. 34. t. vii. f.5; Donov. Brit. Shells, t. sie aoa 
Mont. Test. Brit.116; M. §& R. Trans. Linn. Soe. viii. 87 ; 
Flem. Edinb. Encycl. vu. 94; Dill. Desc. Cat. 195; Turt. 
Conch. Dict. 
