THE 
GEOLOGICAL MAGAZINE. 
NEW MSE RIES. “DECADE” Ver" VOES IV: 
No. III.— MARCH, 1907. 
© GeEIN-AgE. -LASE Gres 
I.—Note on somME VERTEBRATE REMAINS: COLLECTED IN THE Faytm, 
Eeyrt, in 1906. 
By C. W. Anprews, D.Sc., F.R.S., F.G.S., British Museum (Natural History). 
HE collecting expedition to the Fayim in the Spring of 1906 did 
not result in the discovery of any striking new forms, but 
nevertheless a large number of specimens was obtained, some of which 
add considerably to our knowledge of species already imperfectly 
described. Of these specimens the most important are: (1) An 
associated skull and mandible of Paleomastodon wintoni with the 
upper and lower dentition, including the tusks, in perfect preservation; 
an atlas, humerus, radius, part of an ulna, and some vertebre of the 
same individual were also found, and confirm the determinations that 
had previously been made from isolated examples. (2) A beautifully 
preserved mandible of a very young Pal@omastodon, probably the same 
species. In this specimen the two posterior milk-teeth are in position, 
while the anterior one is represented by its empty alveolus. Beneath 
the two milk molars are the germs of pm. 3 and pm. 4, almost ready 
to replace them vertically in the ordinary way. ‘The first molar is in 
wear, and the crown of the second is fully developed, but had not been 
cut. One of the most interesting points, however, is that the outer 
edges of the incisors are serrated, so that this specimen finally proves 
that the genus Phiomia was founded on the anterior portion of a very 
young mandible of one of the smaller species of Pal@omastodon, as 
indeed has already been suggested by Schlosser.1 The above- 
mentioned specimens will be described in detail elsewhere. Of the 
remainder, perhaps the most interesting is a portion of the jaw of the 
remarkable animal Geniohyus mirus, the type-specimen® of which 
is the anterior region of a mandible in which all the cheek-teeth 
- except the talon of m. 3 are well preserved. The most peculiar 
feature of this specimen was described as being the presence of 
a downwardly and backwardly directed hook-like process arising from 
the ventral surface of the ramus immediately behind the symphysis. 
Another peculiarity noted was the extreme narrowness of the ramus 
1 Neues Jahrb. f. Min., etc., vol. i (1905), pt. 1 (Referate), p. 157. 
* Got. Mac., Dec. V, Vol. I (1904), pp. 160-161, Pl. VI, ie 4, 
DECADE V.—VOL. IV.—NO. III. 
“I 
