18 JURASSIC BIVALVIA AND GASTROPODA 



the same localities seems to be Grammatodon (Indogrammatodon) virgatus (J. de C. 

 Sowerby). Material from the same area collected by geologists of the British 

 Petroleum Company Ltd. includes a number of bivalves and gastropods stated to 

 come from Upper Oxfordian beds. These may be listed as follows : 



Eopecten anbryi (Douville) 



Pseudolimea mandawaensis sp. nov. 



Liostrea polymorpha (Munster) 



Astarte sowerby ana Holdhaus 



Pholadomya hemicardia Roemer 



Plenromya calceiformis (Phillips) 



Aitken's locality WA. 1817, which he informs me is probably Upper Oxfordian, 

 has yielded the gastropod recorded herein as Nerinella hnuelleri Cox, associated with 

 Grammatodon {Indogrammatodon) virgatus and an indeterminate perisphinctid 

 ammonite. 



Ammonite-bearing Oxfordian beds in the Bagamoyo hinterland of Tanganyika 

 have yielded the following species, as also recorded in the present memoir : 

 Grammatodon {Indogrammatodon) stockleyi Cox 

 Pteria tanganyicensis sp. nov. 

 Meleagrinella radiata (Trautschold) 

 Entolium corneolum (Young & Bird) 

 Limatula moorei sp. nov. 

 Gryphaea hennigi Dietrich 

 Trigonia {Frenguelliella) tealei Cox 

 Astarte episcopalis de Loriol 

 Fimbria quennelli sp. nov. 

 Pleuromya uniformis (J. Sowerby) 

 Goniomya liter ata (J. Sowerby) 

 Bourguetia saemanni (Oppel) 



No extensive collections of Oxfordian bivalves have yet been made in the coastal 

 area of Kenya, although a few species were recorded by Weir in the Hunterian 

 Museum Monographs. In the Taj abba- Wergudud area of N.E. Kenya Saggerson & 

 Miller (1957 : 13) have referred to the Oxfordian a series of pink and yellow fossili- 

 ferous limestones to which they have given the name Golberobe Beds. Unfortunate- 

 ly, however, there is no ammonite evidence for the exact dating of these deposits. 

 Bivalves from these beds which have been named specifically and are dealt with in 

 the present memoir are as follows : 



Modiolus imbricatus (J. Sowerby) 



Modiolus {Inoperna) sowerbianus (d'Orbigny) 



Mytilus {Falcimytilus) tifoensis sp. nov. 



Mytilus {Falcimytilus) dietrichi sp. nov. 



Brachidontes {Arcomytilus) laitmairensis (de Loriol) 



Gervillia saggersoni sp. nov. 



Gervillella siliqua (Eudes-Deslongchamps) 



