It) HOLOPELLA INTERMEDIA (jVPCoy). Natural size, from the Upper Ludlow of High Thorns, 

 Underbarrow, Kendal. 



17 HOLOPELLA TENUICINCTA (M-'Coy)- Natural size, from the sandstone of Mulock quarry, 

 Dalquorhan. 



17 « Part of one of the whorls of do. magnified 4 diameters, to shew the striation. 



18 TROCHUS MOOREI (M'^Coy). From the sandstone of Mulock quarry, Dalquorhan, natural size. 

 1 S a ■ Back view. 



1.9 MUROHiSONIA TORQUATA (M-^Coy). From the Upper Ludlow rock, near Kendal, natural size. 



19 (/ • • Two whorls magnified. 



20 MUROHISONIA CANCELLATULA (M^Coy). Natural size, from the scliists of Mulock quarry, 



Dalquorhan. 



20 n ■ • Portion of surface of do. magnified. 



21 MUROHISONIA SIMPLEX (M^Coy). Portion of large specimen, natural size, from the sandstone 



of Mulock, shewing the external shell, 



22 TURBO CREBRISTRIA (M-^Coy). Natural size, from the schists of Gelli Grin, Bala, shewing 



the thickness of the shell, the flattened form of the whorls of the cast, and the superficial 

 lineation. 



2.3 EUOMPHALUS LYRATUS (M-^Coy). Natural size, from the schists of Llansantfraid, Glyn 

 Ceiriog. 



2-t CONULARIA SUBTILIS (Salt.) Natural size, from the Upper Ludlow rock, near Kendal. 

 2-i a Portion of surface of do. magnified. 



25 BELLEROPHON SUBDECUSSATUS (M'Coy). Natural size, from the schists of Mulock. 

 2-5 a Keel and portion of surface of do. magnified, from Llanrwst. 



26 TROCHOLITES ANGUIFORMIS (Salt. Sp.) Natural size, from the hmestone of Mynydd Fron 



Frys, 5 miles W. of Chirk, the siphon projecting slightly at the inner margin of the right hand whorl. 



27 ORTHOCERAS BACULIFORME (Salt.) Natural size, from the Upper Ludlow rock of Brigsteer, 



Kendal. 

 27 a End view of do. shewing form of section and position of siphon. 



28,2.9 ORTHOCERAS VAGANS (Salt.) Natural size, from the limestone of Coniston. 



29 a End view of do. shewing form of section and position of siphon. 



30 ORTHOCERAS POLITUM (M'^Coy). Portion of posterior end of very large specimen, natural size, 



from calcareous nodules of Glenquaple. 



30 a End view of septum, shewing form of section and position of siphon. 



31 CYCLOCERAS TENUIANNULATUM (M-'Coy). Natural size. 



31 a Portion of surface, magnified to shew the fine longitudinal strire crossing the rings. 



