612 



SHELLS OF THE UPPER LUDLOW ROCK. 



Hills; Abberley ; Br adnor Hill, Kington ; Tr ew erne Hills, Radnorshire ; Aram, near 

 Newnham : abundant. 



Terebratula pulchra, f. 21. Globose, rather triangular, obscurely 3 lobed, plaited ; plaits sharp, 

 about 20, 5 of which are elevated in the front; beak small, projecting. 



This resembles the last, but is more angular, and has smaller and sharper plaits, which make 

 it peculiarly elegant, while T. Nucula is rather clumsy in its appearance. Length 4 lines, 

 width the same. 



Loc. Delbury ; Bagbarrow Hill ; Malverns. 

 Terebratula pentagona, f. 22. Pentagonal, wider than long, depressed, obscurely 3 lobed, plaited; 

 plaits about 25, rounded, not extending to the beaks, 9 or 10 of the central ones raised at the 

 front ; beak very small. Length 6 lines, width 6^ lines. 

 Loc. Delbury, Salop. 



Lingula minima, f. 23. Oblong, elongated, with parallel sides, flat, smooth and thin. Length 

 4 lines, width 2± lines. 



The species of Lingula so nearly resemble each other, that it is difficult to distinguish them 

 by words. This specimen may be the young of some other species. 

 Loc. Delbury ; Downton Castle. 



Natica parva, f. 24. Sub-hemispherical, smooth; spire flat, of little more than one whorl; aper- 

 ture semicircular, very large. Greatest diameter 4i lines, height 3 lines. 

 Loc. Fownhope ; in the outer band or Ludlow Rock of the Woolhope Valley. 



Pleurotoma articulata, f. 25. Turretted, nearly smooth, being only marked with sharp lines of 

 growth ; whorls 8 or 10, very convex ; sinus nearly in the middle of the whorl, forming a 

 broadish band. The whorls are so round and distinct as to give the spire a jointed appearance 

 like a row of beads. Length 10| lines, width 3^- lines. 

 Loc. Ludlow, and near Ledbury. 



Pleurotoma corallii, f. 26. Turretted, smooth; whorls 8 or 10, convex; lines of growth indi- 

 stinct ; sinus below the middle of the whorl forming a narrow band. Length 6^ lines, width 

 3 lines. 



Loc. Ludloiu promontory ; Larden ; Fownhope ; Botteville, north side of Caer Caradoc ; 

 Aram, near Newnham ; north-east of Gaerfawr (generally enveloped in coral) ; Br adnor 

 Hill, Kington. 



Trochus helicites. (See PI. 3. f. le and 5.) Also Old Red Sandstone. 



Loc. Ludford ; Ludlow. 

 Turbo corallii, f. 27- Conical, acute, covered with sharp spiral lines; whorls about 6, rounded; 



aperture orbicular ; umbilicus closed. Length \ an inch, width 4 lines. 



Loc. Larden; near Ludloiu ; Trewerne Hills, Radnorshire ; Aram; near Newnham, Glos- 

 tershire (in all these distant places enveloped in the same coral, Favosites fibrosa, Goldfuss). 

 Turbo carinatus, f. 28. Conical, acute, ornamented with several spiral sharp carinse, and longitu- 

 dinally striated ; aperture orbicular ; umbilicus closed. Three of the carinae are visible upon 

 each whorl. Length | an inch, width 5 lines. 



Loc. Ludlow 'promontory ; Trewerne Hills ; generally imbedded in coral like the last. 

 Orthoceras striatum, f. 29. (Min. Conch, t. 58.) Gradually tapering, finely and regularly striated 

 longitudinally; septa very close, deep; siphuncle central, rather large, nearly cylindrical. 

 Length 9 inches or more, width 2 to 3 inches. 



Loc. Ludlow; Brecon anticlinal ; Tortworth (generally compressed) . 



