300 Dr. FiTTON on the Strata below the Chalk, 



Pecten lamellosus. Oxfordshire : Denton, with Trigonia gibbosa ; Garsington, with 

 Gastrochaena. Bucks: near Towersey Windmill; Brill, with Exogyra, adher- 

 ing; Quainton, pit east of Ordnance Station, — in soft limestone ; Whitchurch, 

 with Serpula, &c., in white stone ; The Warren near Stewkley. 



P orbicularis. Oxf. : Beneath Garsington ; in concretional Portland stone, with 



Astarte cuneata ; Langcombe, with Trigonia clavellata, in sandy stone. Brill, 

 Bucks. 



Perna quadrata. Oxf.: Garsington?; Denton, with Modiola, &c. ; Great Hazeley, 

 in gritty stone. Bucks: Towersey, in bluish limestone, with pyrites; Long 

 Crendon, in very sandy stone ; Brill ; Quainton, " West pit." 



Plagiosloma rusticitm. Great Hazeley, Oxf. ; in calciferous gritty stone. 



Pleurotomaria : with large whorls, roundish and flattened. Casts occur at Brill, 

 and at Garsington. 



p . A more acute and larger species, Great Hazeley, Oxf., in calciferous 



sandstone. Brill ; and at the Warren, near Stewkley, Bucks. 



Plicatula. Dinton, Bucks : a cast, same as in the "Roche" of Portland. 



Pullastra. Remains of shells, perhaps referable to this genus, have been found at 

 Cuddesden, Oxf., in sandy Portland stone ; and at the Warren, near Stewkley, 

 Bucks. 



Serpula. Remains of. Oxf. : Langcombe ; Great Hazeley, in very sandy stone. 

 Bucks : Whitchurch; in white stone; Haddenham, in calciferous sand; Tower- 

 sey, some specimens of great beauty ; Coney Hill. 



SfpAowm?, casts of Stems : Quainton; Bucks: in soft calcareous sandstone, " Bottom 

 Rock". 



Terebra Portlandica. PI. XXHI. fig. 6. Abundant everywhere in the Portland 

 stone of Oxfordshire and Bucks : at Combe Wood, Oxf. ; Southwarpe, Whit- 

 church, Towersey, &c., Bucks. 



Trigonia clavellata. Langcombe, Oxf. : in sandy stone ; with a Pecten. 



T gibbosa. Universal and abundant in the Portland stone. Oxfordshire : 



Denton, Great Milton, and Combe Wood, immediately in apposition with the 

 " Malm." Bucks : Brill ; Long Crendon ; Whitchurch ; Quainton; Bishopstone. 



T incurva. Quainton, Bucks. 



Venus h Beneath Garsington: in concretional Portland stone; yi\i\\ Pecten orbi- 

 cularis, and Astarte cuneatal. Quainton, pit east of Ordnance Station : in soft 

 limestone*. 



Fishes, Vertebra of. Coney Hill : in " sandstone " calciferous grit. 



Chimcera Townsendii : (Buckland, Proceedings of Geol. Soc. vol. ii. p. 286. ; and 

 Lond. and Edinb. Phil. Mag. 1836. (vol.viii.) p.4— 7.) The beak has been found 

 in the Portland stone at Great Milton, Oxfordshire, by the Rev. C.Townsend. 



* Besides the foregoing, fragments of bivalves, too indistinct to be determined, were found in 

 the Portland stone, at Great Hazeley in Oxfordshire; and at Haddenham, Southwarpe, Stone, 

 and Quainton, Bucks. 



