SHELLS OF THE WENLOCK SHALE. 



631 



Loc. Woolhope. 



Terebratula Imviuscula, f. 14. Rhomboidal, slightly convex, smooth; front rounded, even; sides 



angular. Length 3 lines, width the same. 



Loc. Tynewidd, Llandovery. 

 Terebratula brevirostris, f. 15. Transversely elliptical, plaited ; plaits about 25, sharp ; margin even ; 



valves very convex, nearly equal ; beaks large, short. Length 4 lines, width 6 lines. 



Loc. Croft Valley ; Woolhope. 

 Terebratula interplicata, f. 23. Obovate, transverse, plaited; plaits sharp, principal ones about 



14, the four middle ones depressed at the front, and between each lateral one is a shorter plait ; 



valves very convex, nearly equal ; beaks short, nearly equal ; the sides near the beak smooth, 



with prominent edges. Length 5 lines, width 5| lines, depth 3 lines. 



Loc. Woolhope ; Delves Green. 

 Terebratula spharica, f. 17. Orbicular, ventricose, plaited all over ; plaits about 14, many of them 



forked, rather obtuse, 3 or 4 middle ones much depressed at the front, forming a longitudinal 



canal ; beaks equal, short ; sides concave. Length, width and depth about 6 lines. 



Loc. Tame Bridge. 



Terebratula crebricosta, f. 18. Obovate, transverse, subcylindrical, depressed, plaited; plaits about 

 30, rather sharp, 6 or 8 of them raised into a deep sinus in the edge of the upper valve ; beaks 

 small, acute. Length 7 lines, width 8 lines. 

 Loc. Tynewidd, Llandovery. 



Terebratula Stricklandii, f. 19. Obovate, transverse, ventricose, plaited; plaits about 30, sharp, 5 

 of them raised at the front, producing a broad elevation in the upper and more convex valve, 

 and a corresponding canal in the other flatter one ; beaks small, sharp, adpressed ; near that in 

 the upper valve is a longitudinal canal ; sides smooth near the beaks. Length 11 lines, width 

 13 lines. 



Communicated by Mr. H. E. Strickland, after whom it is named. 

 Loc. Longhope. 



Terebratula imbricata, var. f. 27. (See PI. 12. f. 12.) Also Wenlock Limestone. This is a shorter 

 - variety than that figured in PI. 12., and many specimens are much more ventricose, though 

 smaller. 



Loc. Woolhope; Stumps Wood; Hay Head ; Tame Bridge ; Croft. 

 Lingula Lewisii ? (See PI. 6. f. 9.) Also Aymestry Limestone. 



Loc. Buildwas ; Wenlock; Tynewydd. 

 Euomphalus alatus (Wahlenberg), f. 28. (His. Pet. Suec. p. 36. t. xi. f. 7.) Conical, depressed, 



marked with prominent lines of growth ; umbilicus very open ; margin winged, entire. Height 



i an inch, diameter 1 inch 4 lines. 



Loc. Delves Green ; Tame Bridge. 

 Euomphalus funatus. (See PI. 12. f. 20.) Also Wenlock Limestone. 



Loc. Woolhope. 



Turbo cirrhosus, f. 22. Conical, turreted, whorls few, round, longitudinally grooved; grooves about 

 6, broad; aperture round; umbilicus open. Length 2j inches, diameter of the base If inch. 

 Loc. Wenlock. 



Orthoceras eccentricum, f. 16. Also Lower Ludlow Rock. Very slightly tapering, obscurely stri- 

 ated and furrowed longitudinally ; septa very numerous, almost flat ; siphuncle eccentric. 

 Diameter 1^ inch. 

 Loc. Old Radnor. 



