SUPPLEMENT.— STROPHOGYRI A. 



lxiii 



Distinction. — From agria, less umbilicate and more compressed. 



Localities and Strata. — Dorset : Mapperton, near Beaminster, from a whitish 

 stone ; Bradford Abbas, Paving Bed ; and a near ally, Chideock, top of " Wild 

 Bed," by matrix (C. Upton). 



Date of Existence. — Murchisonse hemera. 



Fig. 20. — Strophogyria cosmia 



a, side view ; b, section ; c, suture-line ; d, radial line. 

 Mapperton. 



3. Strophogyria finax, 8. Buckman. Plate II, figs. 3,4; Woodcut Fig. 21 in text. 

 18S7. Ludwigia Mtjuchisonje, This Monogr., PL ii, figs. 3, 4. 



Description. — Platyleptogyral, angustumbilicate ; subparvicostate, declining to 

 striate; periphery subtabulate. 



Fig. 21. — Strophogyria -yinax : a, side view; b, whorl section; c, suture-lines; d, radial line. 

 Broad Windsor, Dorset. 



