186 Prof. T. R, Jones on the 



4. Bifthocypris testacella, sp. nov. 

 (PI. V. figs. 5 a, 5 &, 5 c.) 



Proportions :—L. 27. H. 12. Th. 10. 



One specimen from Malvern : L. 60, H. 25-lOOOths inch. 



Long and narrow, but arched on the back ; rounded at the 

 ends and depressed along an antero-dorsal slope. Left valve 

 largest, overlapping on the back. It has somewhat the 

 appearance of a Testacella or of a hump-backed leech. Edge 

 view long, narrow-oval. End view short-ovate. 



Vine Coll. (four) no. LXVI3. Tickwood Beds. 



Smith Coll. (two) no. 81. Benthall Edge, Ironbridge. 



Also found by the late Dr. HoU in the Wenlock Shale of 

 Malvern. 



5. Bythocypris symmetrica, sp. nov. (PI. VII. figs. 3 as, 

 6 b (var. c), 4 a, 4b (var. b), 7 a, 7 b (var. a).) 



A series of smooth oblong-ovate carapaces, varying in size 

 and somewhat in profile, from figs. 7 a to 4 a and 3 a. The 

 uniformly narrow subovate edge views of these varieties con- 

 stitute an iinportant link ia their relationship. 



Vine Coll. no. IV3. Bed no. 46. 

 XII. Bed no. 38. 

 XV. (fig. 3). Bed. no, ? 

 Smith Coll. no. 62 (figs. 4 and 7). Eailway- 

 cutting, side of Severn, 

 Ironbridge. 

 79. Eed Sliale, Malvern Tun- 

 nel (west end). 

 81. Benthall Edge, Iron- 

 brido-c. 



Nine 

 specimens 



Thirteen 

 specimens 



6. Byt/iocypris concinna, sp. nov. (PI. V. figs. 6 a, 

 6 Z>, 6 c, and fig. 7 (var. ovalis).) 



Length. 



T5 ,. r Fig. 6 : 23 

 Proportions: I p. g^ ^. ^^ 



