PLATE VI. 



All the specimens are magnified 25 diameters, except figs. 1 a, b. 



Cypridina (Philomedes) elongata, sp. nov. Clay-cross Colliery, Derbyshire. 

 (Page 81.) 



a, Left valve, and b, ventral view (without the hook), magnified 5 dia- 

 meters ; c, portion of the surface, magnified 25 diameters. 

 Cytherella valida, sp. nov. Calees, East Cumberland. (Page 70.) 



«, Right valve ; b, left valve; c, ventral view. 

 Cytherella Benniei, sp. nov. Mouse-Water, Lanarkshire. (Page 70.) 



a, Left valve ; b, ventral view. 

 Cytherella Benniei, sp. nov. Calderside, Lanarkshire. (Page 70.) 



a, Right valve ; b, ventral view. 

 Cytherella Benniei^ sp. nov. Calderside, Lanarkshire. (Page 70.) 



a, Left valve ; b, dorsal view. 

 Cytherella recta, sp. nov. Auchenbeg Old Quarry, Lanarkshire. (Page 71.) 



a, Left valve ; b, ventral view. 

 Cytherella Benniei, sp. nov. Large individual. Kennoway Den, Fifeshire. 



(Page 70.) 

 Cytherella brevis, Jones. Campsie, Stirlingshire. (Page 72.) 



a, Right valve ; b, edge view # 

 Cytherella concinna, sp. nov. From David Ure's specimens in the Hun- 



terian Museum, Roy. Coll. Surgeons, London. (Page 71.) 

 Cytherella scrobiculata, sp. nov. a, From David Ure's specimens in the 

 Hunterian Museum, Roy. Coll. Surgeons, London ; b, c, d, and e, from 

 Robroyston, Lanarkshire. (Page 76.) 



a, Left valve ; b, right valve, rather crushed ; c, right valve ; d, left 

 valve ; e, dorsal view. 



11 a, b. Cytherella recta, sp. nov. Wilsontown, Lanarkshire. (Page 71.) 



a, Left valve ; b, dorsal view. 



12 a, b. Cytherella concinna, sp. nov. Holwell, Somerset. (Page 71.) 



a, Right valve ; b, ventral view. 



13 a, b. Cytherella Hibernica, sp. nov. Cultra, County Down, Ireland. (Page 72.) 



a, Right valve ; b, edge view. 



14 a, b. Cytherella aqualis, sp. nov. Great Orme Head, North Wales. (Page 74.) 



a, Side view ; b, dorsal view. 



15 a, b. Cytherella csqualis, sp. nov. Gare, Lanarkshire. (Page 74.) 



a, Side view ; b, dorsal view. 



16 a, b. Cytherella cequalis, sp. nov. Gare, Lanarkshire. (Page 74.) 



«, Side view ; b, dorsal view. 



17 a, b. Cytherella Benniei, var. Iowensis. Upper Coalmeasures ; Iowa, North 



America. (Page 77). 



a, Left valve ; b, ventral view. 



18 a, b, c. Cytherella subreniformis, sp. nov. Fusulina-limestone ; Iowa, North 



America. (Page 79.) 



a, Left valve ; b, right valve, interior ; c, ventral view. 



19 a, b. Cytherella concinna? Fusulina-limestone ; Iowa, North America. (Page 79.) 



Fig. 





1 



a- 



—c. 



2 



a- 



—c. 



3 



«, 



b. 



4 



a, 



6. 



5 



a, 



6. 



6 



a, 



6. 



7 



a , 



b. 



8 



a, 



b. 



9. 







10 



a- 



—c. 



