PLATE XXVI. 



Fig. Page 



1. Gigantoj)his garstini, Andrews ; part of vertebral column, from above : two- 



thirds nat. size. Qasr-el-Sagha beds (Middle Eocene). 



[Part of type specimen, C. 10022. J 307 



2. Ditto ; vertebra from side, (2 a) from front, (2 b) from back, (2 c) from below : 



two-thirds nat. size. Same horizbn. [R. 3188.] 307 



3. C?) Ditto ; posterior portion of left mandibular ramus from above, (3 a) from 



outer side : nat. size. Same horizon. [C. 10023.J 308 



4. Pterosphenus schweinfurthi (Andrews) ; vertebra, from back, (4 a) from front, 



(4 b) from left side : two-thirds nat. size. Same horizon. 



[Type specimen, C. 10194.] 310 



5. Ditto ; smaller vertebra, from right side : two-thirds nat. size. Same horizon. 



[C. 10195.] 311 



6. Ditto : large vertebra, from left side : two-thirds nat. size. Same horizon. 



[C. 10196.] 311 



anff., angular process of mandible. 

 art,, articular surface of mandible. 

 a.z., anterior zygapophyses. 

 /., pit on posterior face of arch. 

 hyp., hypapophysis. 

 Iq}., posterolateral process. 



n.sp., neural spine. 

 jy.z., posterior zygapophyses. 



t.p., transverse processes. 



-«., zygantrum. 



zs., zygosphene. 



