118 VENERID^E. 



united, of much the same size, rufous around the orifices ; the 

 upper almost plain or with a few scalloped points ; the branchial 

 has eight short dull rufous cirrhi. The foot is very large, 

 occupying nearly the ventral range, and always presents itself 

 as of a securiform figure; the heel is rather slender and 

 bluntly pointed, but the rest of the foot can sufficiently pro- 

 tract itself to represent a thick, short, strong, broad lingui- 

 form organ; its pure white colour is relieved by beautiful 

 vertical lines of brilliant snow-white. There are a pair of pale 

 brown gill-plates on each side of what are called suboval 

 figures, which in this case stand thus : the dorsal attachment 

 is linear, the free edge curved, expanding posteally in a 

 rounded form, and attenuating as it approaches the buccal 

 orifice ; the upper lamina does not cover the under one ; both 

 show a mixture of coarse and fine striae, the larger being pro- 

 bably the inter-branchial tubes, and the smaller the parallelo- 

 grammic meshes. On each side there are a pair of short tri- 

 angular palpi, strongly striated transversely within, and less so 

 on the outward surface. The liver is brownish-green. The 

 animal is shy and apathetic; the locomotion consists in 

 screwing the shell on its axis, and turning it from one side to 

 the other. 



In the coral zone at Exmouth. 



Y. LINCTA, Pulteney et nobis. 



Artemis lincta, Poll et aliorum. 



, Brit. Moll. i. p. 431, pi. 28. f. 5, 6. 



This species has not occurred alive, but fresh shells are 

 frequently taken with the last species. 



PULLASTRA, Sowerby. 

 P. PULLASTEA, nonnull. et nobis. 



Venus pullastra, Auctorum. 

 V.perforans, Auctorum. 



Tapes pullaslra, Brit. Moll. i. p. 382, pi. 25. f. 2, 3 ; (animal) pi. L. 

 f. 5 & 5 a. 



Animal thick, oblong, of the palest bluish-white; mantle 



