206 VENUS. 



are much coarser on the sides, and in the middle they are 

 only slightly decussated ; the colour is greyish, or pale rusty 

 brown, frequently marked with purplish brown spots, or 

 irregular zic-zac stripes. 



senegalensis. 109. Shell oblong-ovate, angulated 

 at the anterior end, and marked with delicate 

 reticulated striae. 



Venus Senegalensis. Gmelin, p. 3282. 

 Venus pullastra. Montagu Test. p. 124. Maton and 

 Racket, in Lin. Trans, viii. p. 88. t. 2. f. 7- Dorset 

 Cat. p. 36. t. 1. f. 8. 

 Venus literata Var. radiata. Chemnitz, vii. p. 47- t. 42. f. 



439- ? Gmelin, p. 3293. ? 

 Venus, No. 137- Schroeter Einl. iii. p. 196. 

 Tellina rufescens. Gmelin, p. 3238. 

 Le Lunot. Adanson Senegal, p. 227. t. 17. f. 11. 

 Gualter, t. 85. f. C. Wood in Lin. Trans, vi. t. 17. f. IS 

 and 14. 

 Inhabits the coasts of Senegal. Adanson. Nicobar Islands. 



Chemnitz °t Great Britain. Wood, fyc. 

 Shell rarely more than an inch and a quarter long, and an inch 

 and three quarters broad ; it differs from V. decussata in being 

 much smaller, and in having both the longitudinal and trans- 

 verse stria? much finer and more equal, they being thicker 

 only at the anterior end. 



perforans. 110. Shell sub-rhomboidal, with trans- 

 verse striae forming wrinkles at the anterior 

 end, which is truncated. 



Venus perforans. Montagu Test. p. 127- t. 3. f. 6. Ma- 

 ton and Racket, in Lin. Trans, viii. p. 89. 

 Venus polymorpha. Solanders MSS. 



Variety. VVith the margin deeply sinuated. 

 Venus sinuosa. Pennant Zool. iv. p. 95. t. 54. f. 51. A. 

 Maton and Racket, in Lin. Trans, viii. p. 90. 



Inhabits the sea-shore near Plymouth, burrowed in lime-stone. 

 Montagu. 



Shell about half an inch long, and three quarters of an inch 

 broad, but is variable in shape, and the breadth and length 

 are sometimes nearly equal ; the transverse striae are some- 

 times slightly decussated, and the shell at first sight might 

 readily be mistaken for the young of V. decussata; the 

 hinge has three teeth in each valve, of which one is small, 



