x. GASTEROPODA. CEPHALOPODA. 129 



Pleurotomaria anglica. Sow. L. Bredon, Cleeve, Stonehouse, Stow, Banbury. 



expansa. Sow. L. Chipping-Campden, Banbury. M. Bredon, 



Alderton, Dunibleton. 

 rotellaeformis. M. Cheltenham. 



Rotella compressa. Sow. M. Dunibleton, Alderton. 

 Tornatella. sp. M. Stow. L. Stonehouse. 

 Trochus bisertus. Phil. U. Dunibleton, Chipping-Campden. 



imbricatus. Sow. L. Cheltenham, Mickleton. 

 Turbo capitaneus. Munst. S. Frocester, Nailsworth. 



heliciformis. Geol. Surv. L. Fenny-Compton, Aston. 

 , , sculptus ? Sow. M. Dunibleton, Alderton. 

 ,, solectus. Geol. Surv. L. Cheltenham. 



The small number of liassic gasteropoda would be a subject of 

 surprise if we did not call to mind the argillaceous nature of the 

 strata and the circumstances of their deposition. The muddy parts 

 of existing seas are not the favourite haunts of these animals, which 

 on the whole prefer shallow water and stony, sandy, and weedy 

 shores. The naturalist will remark the rarity, if not the absence, 

 of the zoophagous genera, included in the division called ' Siphono- 

 stomata.' The fossil referred (with doubt) to Conus semicostatus 

 by Buckman appears an exception : Cerithium is now classed in the 

 Holostomatous division of Mollusca. 



FOSSILS OF THE LIASSIC PERIOD. 



CEPHALOPODA. 



Ammonites angulatus. Schlot. L. Frethern, Harbury, Fenny-Compton. 

 anguliferus. Phil. L. Cheltenham. 



arrnatus. Sow. L. Cheltenham, Honeybourn, Mickleton. 

 ,, accipitris. Buck. L. Cheltenham. 



Aalensis. O.G.S. U. Frocester. 

 acuticosta. Stride. L. Near Eveshani. 

 annulatus. Sow. U. Dumbleton. 



bifrons. Brug. U. Dowdeswell, Steeple- Aston. S. Frocester. 

 Bucklandi. Sow. L. Keynsham, Defford. 

 Bodleyi. Buck. L. Bredon, Southam. 



Bonardi. D'Orb. L. Bredon. 



Boblayi. D'Orb. L. Cheltenham, Southam. 

 Brodisei. Sow. L. Bredon. 

 Birchii. Sow. L. Bredon. 

 Brooki. Sow. L. Bredon. 

 concavus. Sow. S. Frocester. 

 Conybeari. Sow. L. Saltford. 



Carusensis. D'Orb. L. Cheltenham. 



