CEPHALOPODA. 131 



Ammonites Solaris. Phil. U. Westcombe (Glouc.). 

 Smithii. Sow. L. Vale of Gloucester. 

 Stokesi. Sow. M. Alderton, Dumbleton. 

 striatulus. Sow. S. Frocester. 



subarmatus. Sow. L. Vale of Gloucester, 

 sulcatus (angulatus ?). Buck. L. Cheltenham, 

 tortilis. D'Orb. L. Cleeve. 

 Taylori. Sow. L. Cheltenham. 

 Thouarsensis. D'Orb. U. Stroud. S. Frocester. 

 torulosus. Schul. S. Leckhampton. 

 Turneri. Sow. L. Bredon. 

 Valdani. D'Orb. L. Cheltenham. 

 variabilis. D'Orb. S. Frocester, Nailsworth. 



Ziphus. O.G.S. L. Cheltenham. 



Belemnites acutus. Miller. L. Cheltenham, Fenny-Compton, Shipston. 

 acuarius. Schl. L. Cheltenham. 

 clavatus. Blainville. L. Cheltenham, Stow, Mickleton. 



compressus. Stahl. O.G.S. M. Stinchcombe. U. Stinchcombe. 

 elongatus. Sow. M. Stow, Deddington, Mickleton. 

 Fournelianus. D'Orb. M. Stinchcombe. 



irregularis. Schl. S. Frocester, Nailsworth. 



paxillosus. Schl. L. Banbury, Deddington. M. Wotton, Byfield. 

 penicillatus. Sow. L. Cheltenham. 

 tripartitus. Schl. S. Frocester, Nailsworth. 



Voltzii. Phil. S. Frocester, Nailsworth. 

 Aptychus. sp. L. Warwickshire. 

 Ink bag. U. Dumbleton. 

 Geoteothis. U. Dumbleton. 

 Acanthoteuthis speciosa. U. Dumbleton. 

 Nautilus inornatus. D'Orb. M. Dumbleton. U. Stinchcombe. S. Frocester, 



Leckhampton. 



intermedius. Sow. L. Rugby, Deddington. 

 lineatus. Sow. L. Bath. 

 semistriatus. Sow. L. Bredon. 



striatus. Sow. L. Bredon, Cleeve. M. Mickleton. 



The liassic deposits are the richest of all the strata in ammonites 

 and belemnites, and the zeal of collectors, by procuring- them of 

 all ages and under different circumstances, has given occasion to 

 coin too great a number of specific names. Yet, for the most part, 

 the diversity of names for a given set of forms indicates something 

 really different in the history of the species, and most of the 

 designations may be retained as marking varieties worth discri- 

 mination. In making, some years since, a strict comparison of 

 the ammonites of the Yorkshire lias with others from the south 

 of England esteemed to be of the same species, I found often some 



K 2 



