EXPLANATION OF THE PLATES AND WOOD-CUTS. 



Fig. 5. Corbula rugosa. (Lam. Vol. v. 497.) This differs from the last in being a 

 much wider shell, with more regular and prominent laminae upon the surface. 

 Length 2^ lines, width 3i lines. 



Loc. Borders of the Runn. 

 Fig. 6. Tellina exarata. Ovate, compressed, ornamented with many erect concentric 

 laminae ; the posterior extremity pointed, much bent. Length nearly f of the 

 width, which is nearly 2 inches. 



Strongly resembling Tellina virgata, (Lam. Hist. Nat. Vol. v. 52.) but wider 

 and more bent. 



We have ventured (contrary to our usual custom) to complete the surface of this 

 shell, although much has been lost from the specimen. 



Loc. Soomrow. 

 Fig. 7. Venus granosa. Obovate, truncated, posteriorly convex, ornamented with erect 

 concentric laminae, crossed by numerous striae which cut these (near the margin) 

 into rounded grains ; lunette broad, pointed, convex ; beaks nearest the anterior 

 extremity. Length If inch, width more than 2 inches. 



This belongs to the same family of Venus as V. Corbis, and V. puerpera, and is 

 scarcely distinguishable from V. puerpera, /3. (Lam. Hist. Nat. Vol. v. 585.) 



Loc. Soomrow. 

 Fig. 7'* Venus cancellata. Obovate, approaching orbicular, gibbose, ornamented with 

 erect concentric laminas, and many longitudinal striae ; lunette wide, pointed, con- 

 vex ; beaks nearest the anterior extremity. Length If inch, width 1 inch 11 

 lines. 



This resembles the last, except that it is rounder, with thinner laminae, which 

 are not cut into round grains. 



Loc. Soomrow and Kotra. 

 Fig. 8. Venus ?wn-scripta. Transversely oval, convex, smooth, concentrically undu- 

 lated ; lunette elongated, pointed, concave ; beaks nearer the anterior extremity. 

 Length 1 inch 4 lines, width If inch. 



A smooth and thin shell, with little of the aspect of a Venus. 



Loc. Soomrow. 

 Fig. 9. Pullastra'i virgata. Transversely oval, elongated, decorated with smooth 

 concentric ridges; beaks nearest the anterior extremity. Length 13 lines, width 

 1 inch 7 lines. 



Several recent species of Pullastra are like this, but no described one appears 

 to be identical with it. 



Loc. Soomrow. 

 Fig. 10. Cardita intermedia, (Lam. Hist. Nat., Vol. v. part 1. 23. Brocchi. Vol. ii. 520. 

 t. 12, f. 15.) ? This strongly resembles several species of Venericardia, Lam. 



Loc. Soomrow. 

 Fig.W. Cardium triforme. Orbicular, ventricose, longitudinally striated; anterior 

 side covered with round granules formed by decussating striae ; the posterior side 

 crossed by oblique sets of reflected ridges. Length and width 1 inch 4 lines. 



Somewhat resembling the recent Cardium ceolicum. 



Loc. Soomrow. 



