614 



SHELLS OF THE AYMESTRY LIMESTONE. 



tion, which is separated by a slightly concave space from the middle of the shell. Length 11 

 lines, width 1 inch 5 lines. 



Distinguished from Cypricardia undata (PI. 5. f. 4.) by the want of a lunette. 

 Loc. Caynham Camp near Ludlow. 



Cardium? striatum, f. 2. Orbicular, convex, longitudinally striated; striae numerous ; beaks pro- 

 minent. Length 1 inch 10 lines, width the same. 

 Loc. Aymestry ; also near Shelderton in Lower Ludlow. 



Cardium f striatum, var. Larger than the above, and rather oblique in form and furnished with 

 more distant and deeper striae. 



Loc. From the landslip in Wheeler Pallets Wood, north flank of Brindgivood Chace. 

 Avicula reticulata ? f. 3. {Hisinger Petr. Suec. 57- t. xvii. f. 13 ?) Ovate, broad, pointed towards 



the beaks, rather convex, ribbed ; ribs numerous, decussated by the lines of growth ; one valve 



nearly flat; ears unequal, one very large, right-angled. Length 2 inches, width 1 inch 8 lines. 



Loc. Croft Valley; Aymestry. 

 Leptcena euglypha. Productus euglyphus, passim. (See PI. 12. f. 1.) Also Wenlock Limestone. 



Loc. Mocktree ; Aymestry. 

 Leptcena depressa. Productus depressus, passim. (See PI. 12. f. 2.) More prevalent in Wenlock 



Limestone. 



Loc. Mocktree Forest. 



Atrypa didyma, f. 4. [Ter. didyma, Dalm. Act. Holm. 1827- p. 146. t. 6. f. 7 1 Hisinger Pet. 

 Suec. p. 77* t. xxii. f. 70 Nearly globose ; beaks small ; front emarginate, with a furrow in 

 each valve reaching nearly to the beaks. Length 5 lines, width the same. 



This is often found inclosed in Ter. ? Wilsoni, and sometimes a pair of T. Wilsoni inclosing 

 one of this is contained in another of T. Wilsoni. (See f. 7b.) 



Loc. Wallsgrove Quarry ; Sunny Hill Bank, Ludlow ; and also in Upper Ludlow Rock. 

 {Pretty abundant.) 



Atrypa affinis, f. 5. {Ter. affinis, Min. Con. t. 324. f. 2; Atrypa reticularis, Dalm. Act. Holm. 

 1827. p. 127. t. 4. f. 2 ; Hisinger Petr. Suec. 75. t. xxi. f. 11 ; Ter. priscus, Schl. 1. 17. f. 2 ; 

 Von Buch. Terebrat. p. 71-) 



Loc. Very abundant in the Aymestry Limestone and throughout the Upper Silurian Rocks. 



Atrypa aspera (Schlot.). (See PI. 12. f. 5.) Also Wenlock Limestone. 



Loc. Churnbank or Palmer s Cairn, and other parts of Ludlow promontory \ 



Spirifer crispus. (Delthyris crispa, Dalm. loc. cit. p. 122. t. 3. f. 6; S. octoplicatus, M. C. t. 562. 

 f. 4.) (See PI. 12. f. 8.) Also Wenlock Limestone. 

 Loc. Sunny Hill Bank near Ludlow. 



Spirifer interlineatus, f. 6. Transversely oval, convex, finely striated longitudinally, ribbed; ribs 

 all rounded, 5 on each side, a large elevated one in the middle ; beak of the larger valve pro- 

 duced, and then so much incurved as to meet the beak of the other valve. Length 5| lines, 

 width 6| lines. 



Loc. Aymestry ; also in Wenlock Limestone. 

 Orthis Pecten, var. ? Transversely obovate, flat with numerous sharp radiating sulci increasing in 

 number towards the margin. Length 10| lines, width 1 inch 4 lines. 



A much wider shell than the true O. Pecten. Specimen only one imperfect valve. 

 Loc. Aymestry. 



