THE 



GEOLOGICAL MAGAZINE. 



NEW SERIES. DECADE II. VOL. VIII. 



No. IV.— APRIL, 1881. 



OiaiG-HsTJ^L J^S/TIGXiES. 



I. — Desokiptions of Nkw Upper Silurian Braohiopoda from 



Shropshire. 



By Thomas Davidson, F.E.S. 



{^Concluded from p. 109.) 



(PLATE V.) 



1. Waldheimia f Mawei, n. sp. PI. V. Figs. 7, 8. 



SHELL small, marginally sub-pentagonal, longer than wide, 

 straight or slightly indented in front. Dorsal valve laterally 

 gently convex, longitudinally concave, with a small median rib com- 

 mencing at about the middle of the valve, and widening as it nears 

 the front. Ventral valve very convex and keeled along the middle 

 or divided longitudinally by a groove commencing at about half the 

 length of the shell and extending to the front. Beak small, incurved, 

 foramen minute, beak ridges strongly marked. Surface of valves 

 smooth. In the interior of the dorsal valve, under the hinge-plate, 

 a slightly elevated longitudinal septum or ridge extends to within 

 a short distance of the frontal margin. To the hinge-plate are 

 16 17 attached the principal stems of 



the loop, which, after giving off 

 crural processes, extend to with- 

 J If j[ \ in a short distance of the front, 



\// /A \ -^here they become reflected so 



as to form the loop. Length 2, 

 breadth 1^, depth \ line. 



Ohs. — This small shell was pro- 

 cured in some abundance from the 

 washings of the " Tick woodBeds," 

 or Upper Wenlock Shales, from 

 under railway bridge at Farley 

 WaldheimiaMawei^-Day. Developed b^ Dingle, also from the upper part 



of the Wenlock Shale, below 

 limestone, water course, under Benthall Edge, and opposite Iron- 

 bridge in Shropshire. 



Having placed in the hands of the Eev. Norman Glass a number 

 of specimens filled with a light-coloured semi-transparent spar, 

 he was able, after much trouble and patience, to develope the loop in 

 several specimens, and in the clearest possible manner, and so like 



DECADE II. — VOL. VIII. — NO. IV. 10 



