308 GINGLYMACONCHA. VENERIDZ. 
rally painted with reddish divaricating rays. Length one inch ; 
height seven-eighths of an inch. 
Venus fasciata, Lister, Conch. t. cexev. f. 132. 
Venus Paphia, Mont. Test. Brit. 170. 
This species is not uncommon on most of the shores of Bri- 
tain in deep water with sandy bottoms. 
Genus 50. PastpHak. 
The shell trigonal, inclming to cordate (heart-shaped) an- 
teriorly, slightly acuminated but rounded; the umbones re- 
flexed ; the ligament buried; the hinge with three unequal 
teeth in each valve, the lateral ones lamelliform, the hinder 
one in one valve minute. 
1. PastpHaE PENNANTIA. 
Shells opake, divaricatedly suleated and concentrically strio- 
lated; the epidermis brown; internally white or flesh-co- 
loured, in the middle purple. Length one half; height three- 
eighths of an inch. 
Venus ovata, Penn. Brit. Zool. iv. 97. t. lvi. f. 56; Walk. 
Test. Min. Rar. f. 82; Pult. Cat. Dorset. t.1.f. 15; Mont. 
Test. Brit. 120; M. & R. Trans. Linn. Soc. viii. 85 ; Flem. 
Edinb. Encycl. vii. 94; Dill. Dese. Cat. 171 ; Turt. Conch. 
Dict. 239. 
This species is very common in the Irish, but very rare in 
the Devonshire and Cornish seas; it is most commonly found 
in very deep water; but in Dingle Bay, Ireland, I found them 
very abundantly under the sand at the lowest tide. 
STIRPS VI. 
_ Shells cordiform, very convex ; umbones nearly central, very 
prominent and recurved ; no lateral lamellee before the cardinal 
teeth. 
