PLATE 4 



Figs. la, b. Musculus kindopeensis sp. nov. Upper Kimmeridgian, Nerinella Bed. 

 Kindope, N.N. W. of Tendaguru, Tanganyika. Holotype, LL.11331 : a, x 1 ; b, x 3 p. 39 



Figs. ia, b. Brachidontes [Arcomytilus) asper (J. Sowerby). Callovian [?-Lower 

 Oxfordian], Muddo Erri Limestones. Kulong, 2 miles S.W. of Muddo Erri, N.E. Kenya. 

 L.92067 : a, x 1 ; b, x 2 . . . . . . . . . . p. 41 



Fig. 3. Brachidontes [Arcomytilus) laitmairensis (de Loriol). Upper Kimmeridgian. 

 N. of Matapwa, Pindiro area, Tanganyika. LL. 35094, X 1-5 . . . . p. 41 



Fig. 4. Pteria tanganyicensis sp. nov. Upper Oxfordian. Usigiwa river, 6 miles 

 W. S.W. of Kiwangwa, Bagamoyo hinterland, Tanganyika. Holotype, LL. 16793, x 1 p. 42 



Figs. 5a, b. Gervillella didimtuensis sp. nov. Upper Lias, Toarcian. Didimtu hill, 

 2 miles S. of Bur Mayo, N.E. Kenya. Holotype, LL. 35012 : a, exterior ; b, interior, 

 showing hinge-teeth, both x 1 . . . . . . . . . . p. 43 



Fig. 6. Same species, horizon and locality. Paratype, LL.35013 : interior, showing 

 hinge-teeth, x 1 . . . . . . . . . . . . p. 43 



Figs, ja, b. Gervillella orientalis (Douville). Bajocian (?), Pndiro Shales. Near site 

 of Mandawa well no. 1, Tanganyika. LL.35197, x 1 . . . . . . P- 43 



Fig. 8. Same species, horizon and locality. LL. 35198, x 1 . . . . P- 43 



Fig. 9. Pinna buchii Koch & Dunker. Bajocian (?), Pindiro Shales. Near site of 

 Mandawa well no. i, Tanganyika. LL. 35095, x 1 . . . . . . p. 45 



Fig. 10. Gervillella siliqua (Eudes-Deslongchamps). Oxfordian, Golberobe Beds. 

 Tifo, 14 miles N. of Wergudud, N.E. Kenya. L. 92032, x 1 . . . . p. 44 



Fig. 11. Gervillia saggersoni sp. nov. Oxfordian, Golberobe Beds. Korkai Hara- 

 massa, 19 miles E. of Takabba, N.E. Kenya. Holotype, L. 93622, x 1 . . . P- 45 



