PLATE VII. 



All the specimens are magnified 25 diameters. 

 Fig. 



1 a — c. Cytherclla Tatei, Jones. Lamberton, Northumberland. (Page 74.) 



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



2 a, b. Cytherclla ? inflata, Jones and Kirkby. Craigenglen, Stirlingshire. (Page 74.) 



a, Right valve ; b, end view. 



3 a, b. Cytherclla simplex, Jones and Kirkby. Raes Gill, Lanarkshire. (Page 75.) 



a, Right valve ; b, edge view. 



4 a — e. Cytherclla Bichteriana, sp. nov. Devonian ; Saalfeld, Germany. (Page 80.) 



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



5 a — d. Cytherella obliquata, G. S. Brady, MS. Capelrig Quarry, Lanarkshire. 



(Page 73.) 



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



6 a, b. Cytherella reyularis, sp. nov. Fusulina-limestone ; Iowa, North America. 



(Page 78.) 



a, Left valve ; b, ventral view. 



7 a, b. Cytherella Benniei, var. intermedia. Upper Coalmeasures ; Iowa, North 



America. (Page 78.) 



a, Left valve ; b, dorsal view. 



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



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

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



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



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

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



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



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



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



«, 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. Kirkby a costata ? Brockley, Lanarkshire. (Page 89.) 



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



