lxii 



INFERIOR OOLITE AMMONITES. 



XX. Genus — Strqphogyria, 1 8. Buchman. 



(Type — Strophoyyria cosmia, sp. n.) 



Definition. — Substeno-subleptogyral, latumbilicate ; subdensiseptate, subbrevi- 

 sublatilobate ; laterally subflexiradiate ; peripherally anguliradiate, tabulate, 

 parvi-nonsepti-carinate. ' 



Distinction. — From Ludwigina, umbilication is rather less proportionately to 

 development of other characters, compression is less, and periphery is tabulate. 



1. Strophogyria agria, 8. Buchnan. Woodcut Fig. 19 in text. 



Description. — Substeno-leptogyral, latumbilicate; subcrassicostate; periphery 

 tabulate, almost sulcate. 



Fig. 19. — Strophogyria agria : a, side view : b, section ; c, radial line. 



Locality and Stratum. — Dorset : Bradford Abbas, apparently from the Paving 

 Bed. 



Date of Existence. — Murchisonas hemera. 



2. Strophogyria cosmia, S. Buckman. Woodcut Fig. 20 iu text. 



Description. — Subplaty-subleptogyral, sublatumbilicate, costate; periphery 

 tabulate, almost sulcate. 



1 fLTfjotptis, a baud. 



