PLATE VII. 

 All the specimens are magnified 25 diameters. 



Fig. 



1 



it 





Kyyincrciui luiei, joiies. jjamDerion, i^ortnumDeriana. (^rage /4.j 









a, liight valve ; b, ventral view ; c, end view^. 



9 



a, 



u , 



oyj/zere'aa .'^ jones ana jvuKoy. uraigenglen, otirlmgsiiire. (rage /4.) 









a, xviguL vdive , y, enci view. 



Q 

 O 



a. 



0. 



Cytlierella simplex, Jones and Kirkby. Raes Gill, Lanarkshire. (Page 75.) 









u, rvigiiL vdive , 0, euge view. 



A 



a— 



— G. 



Cytlierella Richtenana, sp. nov. Devonian ; Saalfeld, Germany. (Pag© 80.) 









a, c, d, Right valves ; b, e, edge views. 



K 

 U 



Qr- 



—fj 

 — (t. 



vyi/iereii(i ouitquuia, kj. o. JDraciy, iVio. uapeirig ^juarry, jjanarKsnire. 









(Page 73.) 









a, Left valve ; b, ventral view ; c, dorsal view ; d, end view. 



6 



«, 



b. 



Cyt/ierella reyularis, sp. nov. Pusulina-limestone ; Iowa, North America. 









(Page 78.) 









a, Left valve ; b, ventral view. 



7 



a. 



b. 



Cytherella Bemiiei, var. intermedia. Upper Coalmeasures ; Iowa, North 









America. (Page 78.) 









a, Left valve ; b, dorsal view. 



8 



«, 



b. 



Cytherella impressa, sp. nov. Fusulina-limestone ; Iowa, North America. 



a. Left ? valve ; b, dorsal view. (Page 79.) 

 9. Cytherella regularis, var. ? Danville, Illinois, North America. (Page 78.) 



10 «, 3, c. Cytherella ? obesa, sp. nov. West Broadstone, Ayrshire. (Page 75.) 



«, Right valve ; b, dorsal view ; c, end view. 

 11. Cytherella, sp. indet. Wyebourne, Cumberland. (Page 75.) 



12 a, h, c, d. Cytherella Benniei, sp. nov. Swinehill Colliery, near Lanark. (Page 70.) 



a. Left valve ; b, ventral view ; c, dorsal view ; d, end view. 

 IS a, b, c. Cytherella, sp. indet. (near C. valida). Carluke, Lanarkshire. (Page 76.) 



a, b, c, side and edge views of casts. 



14 a, b, c. Cytherella nuciformis, Jones. Permian ; Sunderland, Durham. (Page 73.) 



a, Right valve ; b, dorsal view ; c, end view. 



15 a, b, c. Cytherella ? rotundata, sp. nov. Mayfield Quarry, Dalkeith, Midlothian. 



(Page 76.) 



a, b, c, Outlines of a testiferous specimen. 



16 a, b, c. Beyrichia ? sp. Randerstone, Fife. (Page 88.) 



a. Left valve ; b, ventral view ; c, dorsal view. 



17 a, b, c. Kirhbya costata? Brockley, Lanarkshire. (Page 89.) 



a, Right valve ; b, edge view ; c, end view. 



