PalcEOZoic Blvalved Entomostraca. 415 



3. Entomis nitida (F. A. Homer), 1854. 

 Cypridina nitida, F. A. Eomer, 1854. Palseontographica, vol. iii. ; 

 IBeitrage Harzgebirge, p. 28, pi. 4. fig. 20. 



Goniatite Limestone of the Harz. 



4. Entomis fragilis (F. A. Eomer), 1854. 



Cypridina fragiliii, F. A. Roiner, 1854. Palaeontogr. vol. iii. ; Beitrage 

 Harzgebirge, p. 19, pi. 3. fig. 31. 



Weissenbach Schists of the Harz. 



5. Entomis glohidiis (Eichter), 1856. 



Cypridina globulus, Eichter, 185G. Denkschr. Akad. Wien, vol. xi. ; 

 Beitr. Pal. Thur. Waldes, p. 30, pi. 2. figs. 30-32. 



Cypridinen-Schiefer, Thuringia. 



6. Entomis gyrata'^ (Eichter), 1856. 

 Cypridina gyrata, Pticliter, 1856. Ihid. figs. 33, 34. 

 Cypridinen- Schiefer, Thuringia. 



7. Entomis tceniata (Eichter), 1856. 

 Cypridina icEniata, Ricliter, 1856. Ibid. fig. 35. 

 Cjpridinen-Schiefer, Thiiringia. 



8. Entomis tuherosa^ Jones, 1861. 



Entomis tuberosa, Jones, 1861. Mem. Geol. Surv. Gt. Brit., Neighb. 

 Edinburgh (Map 32), p. 137, pi. 2. fig. 5. 



Upper Silurian : Aymestry, and Bow Bridge, near Ludlow, 

 Shropshire ; Pentlancl Hills, Scotland ; Yarra Lumla, New 

 South Wales. 



9. Entomis imj^endens, Haswell, 1865. 



Entomis impendens, Haswell, 1805. Silur. Form. Pentlaud Hills, p. 38, 

 pi. 3. fig. 11. 



Upper Silurian : Pentland Hills, Scotland. 



10. Entomis hiconcentrica, Jones, 1870. 



Entoinis biconcentrica, Jones, 1870. Month. Microsc. Journ. vol. iv. 



p. 185, pi. 61. fig. 13. 

 Lower Carboniferous : England ; Ireland. 



* Illustrated by a so-called "back view" of the carapace. This and 

 other " back views " of carapaces among Dr. Richter's figures are not clear 

 to me ; and I wait for a fuller description of these species. Figs. 36-38 

 illustrate a very curious form, "■Cypridina calcarata^' (p. 37), which, 

 possibly a link between Cyprella and EtUomis, requires further examination. 



