616 



SHELLS OF THE LOWER LUDLOW ROCK 



Pileopsis vetustis. The aperture of the only imperfect specimen yet obtained from the Aymestry 

 Limestone, appears less expanded than in the Pileopsis vetusta of the Carboniferous Limestone. 

 (M»i Con. t. 607.) 

 Loc. Aymestry, 



Euomphalus funatus. {Min. Con. t. 450; Hisinger Petr. Suec. 37. t. xi. f. 11.) (See PI. 11. 



f. 20.) Also Wenlock Limestone. 



Loc. W alls Grove Quarry, Aymestry ; Usk. 

 Euomphalus carinatus, f. 10. (Is this Tnachus sulcatus, Hisinger Petr. Suec. 38. t. xii. f. 1 ?) 



Nearly discoid, with a broad sharp keel around the margin 5 umbilicated; whorls few, convex, 



marked with many small concentric ridges crossed by sharp lines of growth ; aperture ovate, 



longer than wide. Diameter nearly 3 inches. 



Loc. Aymestry; also in the Wenlock Formation, at Delves Green, JVallsall. 

 Pleurotoma corallii. (See PI. 5. f. 26.) Also Upper Ludlow Rock. 



Loc. Aymestry ; Botville, Caradoc ; Foiunhope. 

 Turbo corallii. (See PI. 5. f. 27.) Also Upper Ludlow Rock. 



Loc. Fownhope ; Aymestry ; Botville, Caradoc. 

 Orthoceras Mocktreensis, f. 11. Gradually tapering; lines of growth distinct; septa rather 



distant; siphuncle large, spherically inflated between each septum. Diameter 1 inch. 



It is difficult to distinguish the species of Orthoceras ''from such specimens as the one figured. 



Though somewhat resembling it in form, this fossil is of less size than O. giganteum, Min. 



Con. t. 246. The specimen figured is remarkable for being half filled with chert and half with 



calc spar ; the surface is siliceous, and has remarkable lines of growth, indicating a break in 



the shell. The name is provisionally adopted. 



Loc. Mocktree Hays ; Ahherley. 

 Orthoceras pyriforme. (See PI. 8. f. 19 and 20.) Also Lower Ludlow Rock. 



Loc. Aymestry [specimen small). 

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



Loc. Ahherley. 



Bellerophon Aymestriensis, f. 12. Thick, discoid, with a broad, rather flat, margin ; whorls few, 

 their section transversely oblong and but slightly indented by the preceding whorl ; aperture 

 expanded. The greater part of the mouth is, in this specimen, broken away, but enough is left 

 to show that it expands : is it not possible that if it were perfect it would prove to be like B. 

 dilatatus, (PI. 12. f. 23 and 24) ? Diameter 3^ inches, thickness 2 inches 10 lines. 

 Loc. Aymestry. 



Bellerophon . Somewhat resembling B. tenuifascia, Min. Con. t. 470., but too imperfect 



to name. 



Loc. Westwood Common. 

 N.B. Several of the above fossils occur in the beds of the Upper and Lower Ludlow Rock, im- 

 mediately above and below the Aymestry Limestone. 



FOSSILS OF THE LOWER LUDLOW ROCK. 



PLATE VIII., IX., X. AND XI. 



Spirorbis tenuis, PI. 8. f. 1. Whorls about 2, dextral ; diameter about 1 line. 



