162 SUPPLEMENT TO THE BRITISH 



141. Waldheimia numismalis, Lamarck, sp. Dav., Ool. Mon., p. 36, PI. V, figs. 4 — 9 ; 



and Sup., PI. XXI, figs. 8, 9. 



Waldheimia numismalis appears to have enjoyed a rather extended vertical strati- 

 graphical range. It occurs in the Upper Zones of the Lower Lias {Am. occynotus and Am. 

 raricostatus), and is present throughout the whole range of the Middle Lias. Large 

 specimens (completely flattened by compression), looking like old Roman coins, were found 

 in vast abundance by Mr. J. P. Walker in the Lower Lias clay at the railway-cutting near 

 the station, at Penny Compton, in Warwickshire. The species has also been found by 

 Rev. P. Smithe near Churchdown, in Gloucestershire. Waldheimia cor, Lamarck, an 

 allied form, has not to my knowledge been hitherto discovered in British Liassic deposits, 

 although Mr. E. Deslongchamps thought one of the specimens (Sup., PI. XXI, fig. 9) 

 might be referred to it. Judging from the figures of W. cor published by the last- 

 named author in his ' Brachiopodes Jurassiques,' it varies considerably in shape and 

 in the extent of the indentation of the frontal portion of its valves, as well as in the 

 degree of their convexity. My distinguished friend observes likewise that some 

 specimens are as flat as W. numismalis, while others have their valves very much more 

 convex. After examining a great number of specimens of both species (?) it appeared to 

 me that they merge wonderfully one into the other. 



Although W. numismalis has its front line usually less indented than W. cor, still 

 this distinction cannot be relied upon. Both present a depression in the anterior third 

 of the length of the valves, although it is usually smaller in W. numismalis, and some- 

 times entirely absent. It is, therefore, a question demanding further consideration, 

 whether W. cor is in reality more than a variety of W. numismalis. Pine examples of 

 W. numismalis have been collected by Mr. Innes Griffin in the zone of Am. Jamesoni at 

 Penny Compton, in Warwickshire, in company with Sp. owyptera, Sp. verrucosa, Tereb. 

 punctata, Bh. tetrahedra, and Lingula sacculus. 



142. Waldheimia sub-numismalis, Dav. Ool. Mon., p. 38, PI. V, fig. 10 ; and Sup., 



PI. XXI, figs. 1—7. 



Terebratula (Wald.) sub-numismalis, E. Desl. Brachiopodes Jurassiques, p. 124, 



pis. xxvii, xxviii, xxix, 1863. 



Shell subpentagonal, broadest posteriorly, nearly straight or very slightly indented 

 in front ; valves about equally deep and convex, but flattened near the front, and 

 especially so in the ventral valve, the corresponding portion in the 'smaller valve forming 



