310 On the Organic Remains 



cervical ; anterior, middle, and posterior dorsal ; lumbar ; and 

 caudal portions of the spine. 



6. Plesiosaurus. A cervical vertebra, resembling that 

 figured in Geol. Trans, vol. v. part 2, plate XLI. fig. 3. 



7. Vertebrae from the middle dorsal, lumbar, and caudal 

 portions of the spine of the j^lesiosaurus, 



8. Bones apparently belonging to the paddles of the ple- 

 siosaurus, 



TestacecB. 



Ammonites peramplus, biplex, decipiens, rofundus, muta- 

 hilis, sublxBvis, binus, excavatus, Birchii^ Taylori, dentatus, 

 Strangwaysi, annulatus, serratus, rotiformis, and some 

 others not yet figured. 



Ampullaria, a cast in calcareous sandstone, associated with 

 a Pectunculus, Venus, and Avicula. 



Area, two or three species not yet figured. 



Astarte lineata and planata. 



Avicula costata, inequivalvis , and echinata. 



Belemnite. The remains of this fossil are found in all parts 

 of the county : they appear to have been originally derived 

 from the cornbrash, marly sandstone, green sandstone, and 

 chalk strata. I possess one, showing the septa and siphun- 

 culus ; and another, with some of its iridiscent internal pearly 

 coat attached to it. 



Cardium. Mineral Conchology, tab. XIV. middle figure. 



Cirrus, of an elliptical form, not produced by fracture. 



Comilaria, a trigonal species, in a boulder of calcareous 

 sandstone, associated with trigonia clavellata. 



Cucullaea (area subacuta of Min. Conch., tab. XLIV. upper 

 figure). 



Dentalium incrassatum, in a septarium, with part of an 

 ammonite. 



Gryphsea incurva, obliquata, dilatata, and bullata. 



Inoceramus, several species in chalk boulders, and casts in 

 flint. The latter are very common in the light lands of the 

 chalk district ; and they frequently exhibit upon them casts of 

 the workings of animalcular parasites in this shell, described 

 by Parkinson, and also by the Rev. W. Conybeare, in GeoL 

 Trans., vol. ii. 



