FROM TANGANYIKA AND KENYA 107 



1903. Isocardia basochiana Defrance ; Bigot & Matte : 167. 



1910. Ceromya concentrica (Sow.) ; Dacque : 33, pi. 5, fig. 5 (non Sowerby sp.). 



1913. Ceromyopsis kiliani Rollier : 268, pi. 15, fig. 9. 



19156. Ceratomyopsis dassei Cossmann : 7, pi. 2, figs. 1-3. 



1924. Isocardia snbstriata Hennig : 67 (partim). 



1925. Ceromya sarthacensis d'Orbigny ; Cottreau : 9, pi. 37, figs. 7, 8. 

 19376. Ceromyopsis substriata (Hennig) ; Cox : 202, pi. 16, fig. 4. 

 i960. Ceromyopsis kiliani Rollier ; Joubert, pi. 11, figs. ia, b. 



Material. Three specimens. 



Localities and horizons. 2 miles E. of Magindu Station, Central Railway, 

 Tanganyika ; Callovian. Hills S. of Rahmu-Melka Murri road, 13 miles W. of 

 Rahmu, N.E. Kenya ; Callovian, Rukesa Shales. Kulong, 2 miles S.W. of Muddo 

 Erri, N.E. Kenya ; Callovian [?-Lower Oxfordian], Muddo Erri Limestones. 



Remarks. Defrance's description and Sowerby's figure of this species have been 

 overlooked by most authors. Bigot & Matte have recorded that Defrance's holo- 

 type was from the Callovian and there seems no doubt that the species is identical 

 with the later described sarthacensis d'Orbigny, kiliani Rollier and dassei Cossmann, 

 all from the Callovian of France. The specimen from the Callovian of Tanganyika 

 figured by Muller as Isocardia striata and included by Hennig in his Isocardia sub- 

 striata is characterized by its strongly coiled umbo, the tip of which is pointed up- 

 wards so as to form the summit of the shell. The specimen from Tanganyika now 

 recorded (the one figured by me previously under Hennig's name substriata) closely 

 resembles it in this respect. These shells are now considered to fall within the range 

 of variation of C. basochiana. 



Ceratomyopsis striata (d'Orbigny) 

 PI. 17, fig. 9 



1822. Isocardia striata d'Orbigny : 104, pi. 2, figs. 7-9. 



1875. Isocardia striata d'Orbigny ; de Loriol : 56, pi. 13, figs. 35, 36. 



1897. Isocardia striata d'Orbigny ; Futterer : 602, pi. 21, figs. 3, 3a. 



1929. Ceromyopsis striata d'Orbigny, Futterer ; Weir : 32, pi. 3, fig. 8. 



1935a. Ceromyopsis striata (d'Orbigny) ; Cox : 188, pi. 19, fig. 10. 



i960. Ceromyopsis striata (d'Orbigny) ; Joubert, pi. 11, figs. 3a, b. 



Material. One specimen (no. L.92191). 



Locality and horizon. Hereri river crossing, 3 miles S. of Melka Kunha, N.E. 

 Kenya ; Kimmeridgian, Hereri Shales. 



Remarks. It is not certain that this species differs morphologically from C. 

 basochiana (Defrance), described in the same year, although it has been customary 

 to draw a specific distinction between specimens from their respective horizons, 

 Kimmeridgian and Callovian. The variability of C. striata is illustrated by the 

 figures published by de Loriol (1875). 



