Pakeozotc Bivalved Entomostraca. 415 



3. Entomis nitida (F. A.' Romer),1854. 



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



i3eitrage Harzgebirge, p. 28, pi. 4. fig. 20. 



Goniatite Limestone of the Harz. 



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



Cypridina fragilis, F. A. Homer, 1854. Palaeontogr. vol. iii. ; Beitrage 

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



Weissenbach Schists of the Harz. 



o. Entomis globulus (Richter), 1856. 



Cypridina globulus, Richter, 1850. Denkschr. Akad. Wien, vol. xi. ; 

 Beitr. Pal. Thur. Waldes, p. 36, pi. 2. figs. 30-32. 



Cjpridinen-Schiefer, Thuringia. 



6. Entomis gr/rata'^ (Richter), 1856. 

 Cijpridina (jyrata, Richter, 1856. Ihid. figs. 33, 34. 

 Cypi'idhien-Schiefer, Thuringia. 



7. Entomis teeniata (Richter), 1856. 

 Cypridina teeniata, Richter, 1856. Ibid. fig. 35. 

 Cjpridinen-Schiefer, Thuringia. 



8. Entomis tuberosa, 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 ; Pentland Hills, Scotland ; Yarra Lumla, New 

 South Wales. 



9. Entomis impendens, Haswell, 1865. 



Entomis impendens, Haswell, 1865. Silur. Form. Pentland Hills, p. 38, 

 pi. 3. fig. 11. 



Upper Silurian : Pentland Hills, Scotland. 



10. Entomis biconcentrica, Jones, 1870. 



Entomis biconcentrica, Jones, 1870. Month. Microsc. Joum. 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 Entomis^ requires further examination. 



