PLATE 21 



Figs. la, b, c. Ceratomya tanganyicensis sp. nov. Bajocian (?), Pindiro Shales. 

 Lihimaliao creek, Mandawa area, Tanganyika. Holotype, LL.35159 : a, right valve, x 1 

 b, dorsal view, X 1 ; c, ornament, x 4 . . . . . . . . p 



Fig. 2. Goniomya trapezicostata (Pusch). Callovian. £ mile N.W. of bridge over 

 Mkulumuzi river, 2 miles W. of Tanga, Tanganyika. LL. 35157, x 1 . . . p 



Fig. 3. Same species. Bajocian. i£ miles E. of Kidugallo Station, Tanganyika. 

 L. 54080, xi. . . . . . . . . . . . • P 



Fig. 4. Ceratomya pittieri (de Loriol). Callovian. Magindu Station, Tanganyika. 

 LL. 35160, xi ............ p 



Fig. 5. Ceratomya wilderriensis sp. nov. Upper Oxfordian, Seir Limestones. Dusse, 

 i\ miles S.E. of Rahmu, N.E. Kenya. Holotype, L. 92226, x 1 . . . . p 



Figs. 6a, b. Cuspidaria ayersi sp. nov. Bathonian [? or Callovian], Asaharbito Beds. 

 1 mile N. of Asaharbito, N.E. Kenya. Holotype, LL. 13246 : a, x 1 ; b, x 2 . p 



Figs, ya, b. Same species, horizon and locality. Paratype, LL. 13247 : a, x 1 ; 



b, X 3 P 



Fig. 8. Thracia lens (Agassiz). Bajocian (?), Pindiro Shales. Lihimaliao creek, 



Mandawa area, Tanganyika. LL.35161, x 1 . . . . . . . p 



Fig. 9. Thracia viceliacensis (d'Orbigny). Callovian. Lonji creek, Mandawa area, 



Tanganyika. LL. 35162, xi. . . . . . . . . .p 



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