SHELLS OF THE AYMESTRY LIMESTONE. 



613 



Orthoceras virgatum. (See PI. 9. f. 4.) Also Lower Ludlow Rock. 



Loc. B ag barrow Hill (Malv ems). 

 Orthoceras Ibex, f. 30. (Orthoceratites annulatus, Hi singer Petr. Suec. 29. t. ix. f. 8.; not of 



Min. Con.) Very gradually and irregularly tapering, compressed, smooth; surface elevated in 



oblique rings, one fourth their diameter apart. Length of the fragment about 2f inches, width 



8 lines. 



Loc. Ludloiu. 



Orthoceras articulatum, f. 31. Very gradually tapering, compressed, smooth; surface elevated in 

 oblique rings, one third their diameter apart. Length of the fragment about 2 inches, width 

 i an inch. 



Loc. Ludlow promontory ; east of Aymestry ; near Ledbury ; occurs also in Lower Ludlow 

 Rock. 



It appears probable that these two fossils are straight portions of Lituites, the O. article- 

 latum being a portion of Lituites articulatus. 

 Cyrtoceras (Goldfuss) Iceve. (See PI. 8. f. 21.) Also Lower Ludlow. 

 Loc. Ludlow. 



Bellerophon expansus, f. 32. Spire small, rounded; aperture very large, two lobed, twice as long 



as broad; sinus broad and short. Length of the aperture 7f lines, width of ditto 11 lines. 



Loc. Ludlow; Treiv erne Hills. 

 ^Bellerophon globatus. (See PI. 3. f. 15. and PI. 4. f. 50.) Base of Old Red Sandstone and 



Ludlow bone-bed. 



The figure in PI. 4. is taken from a cast contained in Coprolites. 



Loc. Ludford ; Ludlow. 

 * Bellerophon carinatus. (PI. 3. f. 4 and 1 d.) Also Old Red Sandstone. 



Loc. Bradnor Hill. 



*Tentaculites scalaris. (See PI. 19. f. 15.) {ScMotheim Petrefact. t. 29. f. 9-6.) Also Caradoc 

 Sandstone. 



Loc. Delbury ; Bradnor Hill ; Fownhope. 

 Tentaculites tenuis, f. 33. Subulate, pointed, very narrow, with numerous slender elevated rings 

 upon the surface. Width of the aperture \ a line. 



More slender in form, and with closer rings, otherwise much resembling T. annulatus, 

 PL 19. f. 16. 



Loc. Near Usk in the same mass with Terebratula canalis, f. 18. 

 N.B. The shells marked with an asterisk occur also in the Tilestones or lowest beds of the Old 



Red Sandstone, and mark the transition from the Old Red into the Silurian System. 



Spirifer trapezoidalis, Terebratula canalis, Tentaculites tenuis, Cornulites serpularius, and Cyr- 

 toceras Iceve, are not fossils of the Upper Ludlow but rather of the Lower Ludlow and Wen- 

 lock strata. 



SHELLS OF THE AYMESTRY LIMESTONE OR MIDDLE LUDLOW ROCK. 



PLATE VI. 



My a rotundata, f. 1. Transversely elongated, convex and wrinkled; beaks near the anterior por- 



4 I 



