PLATE 18 



Figs, xa, b. Pronoella kidugalloensis sp. now Bajocian. i \ miles N.N.W. of Kidugallo, 

 Tanganyika. Holotype, LL. 35143 : a, right valve ; b, dorsal view, both x 1 . p. 109 



Figs, za, b. Eotrapezium? thompsoni sp. nov. Upper Lias, Toarcian. Didimtu hill, 

 2 miles S. of Bur Mayo, N.E. Kenya. Holotype, LL. 35061 : a, right valve ; b, dorsal 

 view, both x 1 ............ p. 



Fig. 3. Anisocardia kinjeleensis sp. nov. Upper Kimmeridgian. Kinjele, 5 miles W. 

 of Mtapaia, Tanganyika. Holotype, L. 51938, x 1 . . . . . .p. 



Fig. 4. Anisocardia didimtuensis sp. nov. Upper Lias, Toarcian. Didimtu hill, 2 miles 

 S. of Bur Mayo, N.E. Kenya. Holotype, LL.35056, x 1 . . . . .p. 



Figs. 5a, b. Anisocardia arkelli sp. nov. Upper Lias, Toarcian. Didimtu hill, 2 miles 

 S. of Bur Mayo, N.E. Kenya. Holotype, LL. 35051 : a, left valve ; b, dorsal view, both x 1 p. 



Figs. 6a, b. Anisocardia ayersi sp. nov. Upper Lias, Toarcian. Didimtu hill, 2 miles 

 S. of Bur Mayo, N.E. Kenya. Holotype, LL. 35057 : a, right side ; b, dorsal view, both 

 XI p. 



Figs, ya, b. Eotrapezium? africanum sp. nov. Upper Lias, Toarcian. Didimtu hill, 

 2 miles S. of Bur Mayo, N.E. Kenya. Holotype, LL. 35058 : a, right side of internal 

 mould ; b, dorsal view, both x 1 . . . . . . . . .p. 



Fig. 8. Anisocardia minima (J. Sowerby). Callovian, Rukesa Shales. 13 miles W. of 

 Rahmu, N.E. Kenya. L. 92120, X 1 . . . . . . . . .p. 



Figs, ga, b. Eotrapezium? kenti sp. nov. Bajocian. 5 miles N.W. of Kidugallo, 

 Tanganyika. Holotype, a left valve, LL. 35144 : a, exterior ; b, hinge-teeth, both x 1 p. 113 



Figs. 10a, b. Same species, horizon and locality. Paratype, LL. 35145 : a, right 

 valve : b, dorsal view, both X 1 . . . . . . . . . p. 113 



Fig. 11. Eomiodon baroni (Newton). Bajocian (?). 1 mile N.N.E. of Ngerengere, 

 Tanganyika. LL.7210, x 1 . . . . . . . . . p. 114 



Figs. 12a, b. Eomiodon tanganyicensis sp. nov. Bajocian (?). 1 mile N.N.E. of 

 Ngerengere, Tanganyika. Holotype, a right valve, LL.7215 : a, exterior ; b, interior, 

 both XI . . . . . . . . . . . . . p. 115 



Fig. 13. Same species, horizon and locality. Paratype, LL.7214, x 1 . . p. 115 



Figs. 14a, b. Eomiodon namgaruensis sp. nov. Jurassic. 1 mile E.S.E. of Uleka, 

 Marudyi-Namgaru area, Tanganyika. Holotype, LL.35146 : a, right valve ; b, dorsal 

 view, both X 1 . . . . . . . . . . . . p. 116 



Figs. 15a, b. Eomiodon dinosanrianum sp. nov. Upper Kimmeridgian. Tendaguru, 

 Tanganyika. Paratype, L. 53323 : a, X I ; b, X 3 . . . • . . p. 116 



Figs. 16a, b. Same species, horizon and locality. Holotype, L. 53322 : a, X 1 ; 

 b, X 3 . p. 116 



Fig. 17. Eomiodon (Africomiodon) cutleri sp. nov. Upper Kimmeridgian, " Trigonia 

 smeei " Bed. Tingutitinguti creek, Tendaguru, Tanganyika. Paratype, L. 51998, hinge- 

 teeth of left valve, X2. . . . . . . . . . P- 117 



Figs. 18a, b. Same species, horizon and locality. Holotype, a right valve, L. 5 1995 : 

 a, exterior. X 1 ; b, interior, X2. . . . . . . . . p. 117 



