100 Alfred Harker— Rocks of the ‘‘ Beagle” Collection. 
and molars ‘agree with those already described in the Catalogue of the 
Fayim Vertebrates (p. 87).: 
The total length of the mandible here figured is 13:8 em., its depth 
beneath the condyle about 6°5 em. The lengths of the teeth in milli- 
metres are: canine, 4 app.; pm. 1, 7; pm. 2, 3; pm.3) 85 pmeoe 
my ty lOl; m2; le. myo. The total length of the tooth series 
(e: to m. 8) i is 7-5 cm. ; the length of the molar series is 4 cm. 
In the other specimen the ‘depth of the ramus beneath m. 38 is 
4-3 cm., and the distance from the hinder end of m. 8 to the posterior: 
border of the mandible is about 5'5 cm. 
Several more or less imperfect curved front upper incisors of Hyra-; 
coids were collected. They were of varying size and are triangular in. 
section, the two anterior faces only being covered with enamel. : 
The remains of Carnivora are very rare, and few were obtained, the 
most important being a fragment of the left maxilla, with two teeth: 
(pm. 4 and m.1). The molar is almost exactly intermediate in form: 
between the corresponding teeth in Pterodon and Hyenodon, having 
a less prominent inner tubercle and longer posterior blade than in the 
former, but in these characters more resembling the latter. It seems, 
therefore, that this maxilla belonged to <Apterodon macrognathus, 
a species founded on a mandible, the dentition of which is likewise in 
some respects intermediate between that found in the genera above 
referred to; it also agrees in size with the specimen now under 
consideration. 
An enormous canine, probably that of Pterodon africanus, some 
cervical vertebre, and a tibia were also obtained. 
One rather notable find was the ulna of a large wading bird, 
apparently nearly allied to Ardea. Compared with the same bone of 
Ardea goliath, this ulna is somewhat smaller and notably stouter in 
proportion to its length, but in the form of its extremities and of the 
various muscle impressions it is closely similar. Bird bones are 
extremely rare in these beds, at least in sufficiently good condition to 
collect. 
- No notable reptilian remains were found. ‘g 
It will be seen that very much more remains to be done in the 
Faytim, many of the animals described being only very incompletely 
known, from mere fragments; in several important instances, e.g. 
Geniohyus, the skull remains quite unknown. i 
II.—Nores on tHE Rocks or THE ‘‘ BragLe’’ CoLLEcrion. 
ob Ligvidli, 
By Atrrep Harker, M.A., F.R.S. 
da voyage of the ‘‘ Beagle” in 1831-6 was not only the starting- 
point of Charles Darwin’s scientific career, but also, and more’ 
particularly, it laid the foundation for the whole of his geological 
work, as embodied in the well-known series of volumes.’ The 
1 «¢ Journal and Remarks,’’ 1839 ; 2nd edition, entitled ‘‘ Journal of Researches 
. during the Voyage of H.M.S. < Beagle’ . . . ,’? 1845.° ‘‘ The Structure 
and Distribution of Coral Reefs,’’ 1842. ‘: “Geological Observations on the Volcanic 
_ Islands . . . ,’’ 1844. ‘‘ Geological Observations on South America . . . » 1846. 
