R. TATE ON THE LIAS ABOUT RADSTOCK. 509 



Section, Railway -cutting, Fenny Compton, Warwickshire, eight miles 

 north from Banbury. 



This section is the only one of any extent in the basal beds of the 

 Middle Lias, excepting those on the Dorset and Cleveland coasts ; 

 and though it presents no junction with the Lower Lias, yet it ex- 

 hibits that paleeontological uniformity which is insisted upon for 

 this horizon throughout the British area. From it, in conjunction 

 with that of Radstock, we also learn that the prevailing species of 

 the zone are unaffected by the nature of the rock. The measures 

 are those made by T. Beesley, Esq., F.C.S., in whose company I 

 have examined the section, and noted the positions of the fossils 

 recorded. 



ft. in. 



1. Lias clay disturbed 6 



2. Shaly clay, with a band of f err o -clay stone nodules about 5 ft. from 



base, containing Ammonites ibex, A. Valdani, A. Maugenesti, 



A. Henleyi 30 



3. Blue, weathering grey, argillaceous limestone, A. Valdani, Bel. 



clavatus, Pholadomya decor ata, Gryphcea obliquata, Inoceramus 

 ventricosus, Lima hettangiensis, Waldheimia numismalis, Spiri- 

 ferina verrucosa, Bhynchonetta rimosa 1 



4. Shale 4 



5. Friable argillaceous limestone, A. Loscombi, A. Jamesoni, Belem- 



nites, Modiola scalprum, Limea acuticosta, Plicatula spinosa, 

 Cardinia attenuata, Pecten priscus, Waldheimia numismalis, 

 Bhynchonetta rimosa, B. variabilis, Corals 9 



6. Shale 2 



7. Band of nodules, Unicardium cardioides, Pecten priscus, P. calvus, 



Limea acuticosta, Terebratula subovoides 2 



8. Gryphcea-h&nd — occasionally a yellow stony bed. Bel. clavatus, 



large Gryphcea obliquata 1 



9. Limestone nodules 2 



10. Shale 5 6 



11. Argillaceous limestone nodules, Pectm calvus, Terebratula subo- 



voides ? 3 



12. Clay with small claystone nodules, fossils throughout, but chiefly 



in the lower 30 feet. Ammonites armatus, Bel. breviformis, 

 Cerithium Slatteri, C. camertonensis, Bentalium angulatum, 

 Pecten priscus, Plicatula spinosa, Gryphcsa obliquata, Leda 

 minor, Waldheimia numismalis, Bhynchonetta variabilis, Crus- 

 taceans 80 



Total 130 10 



The total number of species, collected from this section, which 

 embraces the subzones of A. Henleyi, A. Jamesoni, and A. armatus, 

 is 109, one of which is undescribed ; I will call it Protocardwm 

 bombax. This new species is distinguished from its Liassic congeners 

 by its globose form, inflated beaks, and by the numerous (50) fine, 

 serrated, radial striae on the narrow, subconcave, posterior area; 

 dimensions, height 1*1 inch, breadth 1*05 inch, thickness 1 inch. 



