TRANSACTIONS OF THE SECTIONS. 



81 



stratigrapliical lines. The lithological characters, and other physical evidence, assist 

 the investigation, but do not enable the geologist to assign exact limits to such con- 

 tiguous formations. It is here that the value of palaeontological evidence becomes 

 so important; for without its aid it would be impossible to say where one rock group 

 terminates and another begins : this testimony of the rocks proves, that it is by the 

 zones of life alone that the line of separation between the Lias and the Inferior Oolite 

 can be drawn, and that if we accept this view of the subject, w^e are bound to admit 

 that a considerable deposit, which has hitherto been grouped with the Inferior Oolite, 

 must be transferred to the Upper Lias, of which it forms its highest stage. 



The following list contains all the species which have been collected from the 

 sands and Cephalopoda bed of Beacon Hill, Nailsworth, Frocester Hill, and Wotton- 

 under-Edge : — 



R^'ptilia. 



Ichthyosaurus, sp., vertebrae of. F. 



Pisces. 

 Hybodus, portion of a dorsal ra)-. F. 



Ammonites opalinus, Reinecke. 

 bifrons, Brug. F. 

 insignis, Schiihl. F. W. 

 hircinus, Sckloth. F. 

 Jurensis, Zieten. F. N. 

 striatulus, Sow, F. 

 Thouarsensis, d'Orhig. F. 

 radians, d'Orhig. F. B. 



„ Dewalquianus. F, 

 Mooreii, Lycett, n. sp. F. 

 discoides, Zieten. ' F. 



Cephalopoda. 



B. F. Ammonites Raquinianus,e?'0/-Ji5f. F.N.W. 



Leves(\ne\, d'Orbig. F. 



concavus. Sow. 



Leckenbyi, Zyc, n. sp. F. 



variabilis, d'Orhig. F. N. W. 

 Nautilus inornatus, d'Orhig. F. 

 Belemnites compressus, Voltz. F. N. W. 



tripartitus, Schloht. F. N. W. 



irregularis, Schloht. 



Nodotianus, d'Orhig. 



F.N.W. 

 F. 



Gasteropoda. 



Pleurotomaria nearly allied to Amal- *Turbo capitaneus, Miinst. F. N. 

 thei, Quenstedt. Trochus allied to duplicatus, Sow. 



Chemnitzia lineata?. Sow. N. 



Conchifera. 



Cypricardia brevis, Wright. F. N. 



N. 



*Lima bellula, fyyc. F. N. 

 •Pholadoniya fidicula, Sow. F 

 *Gervillia Hartmanni, Miinst. 

 *Trigonia striata, Sow. F. N, 



* Pern a rugosa, Goldf. N. 

 *Hinnites abjectus, Phil. F. N. 

 *Pecten articulatus, Goldf. F. 

 ♦Gresslya abducta, Phil. F. N . B 



* conformis ?, Agass. F. N. 

 *Pleuromya tenuistria, Agass. F. 

 *Goniomya angulifera. Sow. F. 

 *Astarte excavata, Sotv. F. N. 

 *Myoconcha crassa, Sow. N. 

 ♦Astarte modiolaris, Lamk. N. 

 •Cypricardia cordiformis, Desh 



Pecten comatus ?, Goldf. N. 

 Opis carinata, Wright. F. 



N. B. Cardium Hullianum, Wright. F. N. 

 F. N. Opellii, Wright. N. 



Cucullffia allied to insequivalvis, Goldf. N. 



Lima electra, d'Orhig. F. N. 



Unicardium, nov. sp. N. 



Tancredia, nov. sp. 



Trigonia Ramsayii, Wright. F. 



Pecten textorius ?, Goldf. F. 

 , N. Pholadomya allied to media, Agass. F. 



Astarte complanata?, Romer. N. 

 lurida, Sow. N. 



Lima ornata, Lgc, n. sp. N. 



Gervillia fornicata, Lgc, n. sp. N. 

 F. Area allied to olivfeformis, Lgc. N. 



Nucula ovalis }, Ziet. N. 



Pholadomya ovulum, Agass. 



Brachiopoda. 

 Tcrebratnla subpunctata, Z)fl!t;!<?. F. N. B. Rhynchonella cynocephala, 7?JcA. F. B.f 



t B. F. N. W. indicate that the species is found at Beacon, Frocester, Nailsworth, and 

 Wotton-under-Eilge. 



1856. 6 



