Palaeozoic Bivalved Entoviostraca. 181 



3. Macrocypris siliquoideSj sp. nov. 

 (PI. V. figs. 9 a, 9 &, 9 c.) 



Proportions :— L. 22. H. 8. Tli. 6^. 



Probably a Macrocypris, the right valve being somewhat 

 larger than the left. Carapace small, long, and narrow, or 

 elongate-amjgdaloid ; nearly cylindrical, bat tapering at the 

 ends, and somewhat compressed anteriorly. More arched on 

 the back than below, where tlie margin is slightly sinuous 

 and incurved. 



Two specimens. Vine Coll. no. iVg. Bed no. 46. Shales 



over the Wenlock Limestone j and 

 no. 22. Buildwas Beds. 



4. Macrocypris symmetrica, sp. nov. 

 (PI. VII. figs. 8 a, Sh.) 



Proportions :— L. 15^. H. 7. Th. 5. 



Measurement in lOOOths of an inch : — 



L. 30. H. 16. Th. 12. 



Carapace small, smooth, subcylindrical, narrow, almond- 

 shaped in profile ; feebly arched above, slightly curved below, 

 rounded at the ends, one of them (anterior) more compressed 

 than the otlier. Right valve overlapping the left. Edge 

 view narrow, acute-ovate. 



This is smaller and proportionately shorter and thicker than 

 M. siliquoides. 



Smith ColL (one specimen) no. 63^. Woolhope. 



5. Macrocypris ? alta, sp. nov. 

 (PI. V. figs. 10 a, 10 b.) 



Proportions :— L. 13. H. 8^. Th. 6. 



Carapace small, convex, short, subovate, rounded above and 

 at the ends, nearly straight below. Compressed in front, so 

 that the lateral contour is ovate with one acute end. The 

 right valve is apparently the largest. 



Smith Coll. (one specimen) no. 53^. Railway-cutting, 

 side of Severn, Ironbridge. 



5. Macrocypris'^ crassula, sp. nov. 

 (PI. VII. figs. 10 a, 10 ^'.j 



Proportions :— L. 19. H. 10. Th. 8. 



Taking the narrowest (lowest) end for the anterior, the 

 right valve of this carapace strongly overlaps the other. This 



