TERTIARY VERTEBRATA OF THE FAYCtM. 
:;1G 
])(‘(;t()r;il spines are still aiiiciilat(Ml with the shoiihler-ginlle ; so far as can be seen the 
oriiainentatlon was similar to that of the dorsal spine ; the length of these spines must 
have been about 17 cm., their width at the base 3’5 cm. 
P. 10258. Ijarge imperfect skull, wanting the posterior portion ; the greatest width of its anterior 
end is about 23 cm. Presented hy the Eyyptian Gooernment, 1901. 
The following specimens belong to various Siluroid fishes, but cannot be more definitely 
determined ; — 
P. 10252. Anterior complex vertebra of a particularly long and slender form. Its length is 
IG‘1 cm. ; the depth of the anterior face of the centrum about G cm. 
Presented hy Baron JPopcsa, 1905. 
P. 10253. Three anterior complex vertebrae, similar in form but of smaller size than last. 
Presented hy Duron Nopcsa, 1905. 
P. 10251. A number of anterior dorsal vertebrae with short disc-like centra. One of these measures 
1'7 cm. in length at its ventral edge, while its height and width are about 5'3 cm. 
Presented hy Baron Eopcsa, 1905. 
P. 10255. Vertebrae, probably from further back in the column. The centra are much larger than 
those just described. They are in most cases deeply biconcave, and laterally are 
excavated by a pair of dorso-lateral depressions and a pair of ventro-lateral depressions. 
Presented hy Baron Nopcsa, 1905. 
P.10241. Anterior complex vertebrje and the three succeeding disc-like vertebrje of an individual of 
large size. The length of the complex vertebra is IGA cm., the height of its anterior 
face about G cm. Presented hy the Eyypllan Government, 1904. 
P. 10242. A series of united dorsal vertebrae with very short centra. The processes are well 
preserved in some part of this column. Presented hy the Eyyptian Government, 1904. 
P. 10246. Two very large and massively constructed vertebrae. One of these bears w<>ll-develoj)ed 
zygapophyses, such as may he seen in the vertebral column of Bayrns. The peculiarity 
of these processes is that the articular surfaces of the anterior zygapophyses look outwards 
and downwards, those of the posterior, here sessile on the centrum, upwards and a little 
inwards, the opposite to what usually occurs in the higher AArtebi'ates. 
C. 10201. Long and slender anterior complex vertebra, similar to P. 10252. Length IG cm. 
C. 10200. Much smaller and especially shorter complex vertebra. Length 9 cm. 
C. 10052. Series of six dorsal vertebrcC with disc-like centra. 
C. 10049. Large, deeply biconcave vertebrcE similar to P. 10255. 
P. 10257. Imperfect pectoral spine. Tlie anterior edge bears a row of transversely elongated 
tubercles near the tip ; the sides of the spine also are tuberculate. Length so far as 
preserved IG'4 cm. 
