Dr. C. W. Andreics — Extinct Vertebrates from Egypt. 291 



corresponds to the supposed orbit of Pteraspis, does not, I think, 

 admit of any reasonable doubt. 



r. r 



Fig. 2. — Restored outline of the ventral aspect of Drepanaspis Gemilndenensis, Schl. 

 Siu'face ornament omitted, and the tail twisted round so as to appear in proiile. 

 r. rostral or upper labial plates ; e.l. external labial plates ; x. sensory- 

 openings (orbits ?) ; a.v.l. anterior veutro - lateral plates ; m.v. median 

 ventral; p.v.l. posterior ventro-lateral ; p.l. postero- lateral or cornual plates. 

 Mouth and supposed cloacal opening indicated in black. 



II. — Preliminary Note on some Kecently Discovered Extinct 



Vertebrates from Egypt. (Part III.) 



By Chas. W. Andrews, D.Sc, F.G.S., British Museum (Nat. Hist.). 



MORE detailed examination of the material collected by Mr. Beadnell 

 and myself in the Faytim in 1901 has led to the recognition 

 of two additional species of McBritherkim, and has made it clear that 

 the Sirenian belongs to a distinct genus, which presents some 

 characters of much interest and is nearly related to Prototherium 

 {Halitherium) veronense, described by Z'igno from remains found in 

 beds of Upper Eocene age at Monte Zuello in Northern Italy. 



