262 MR. P. L., SCLATER ON A LEAF-INSECT. [May 21, 
The radius and the ulna of Theriodesmus are of a simple generalized 
type, in some points resembling those of Reptiles ; but the olecranon 
has more or less mammalian characters. 
So far as this specimen carries us, Theriodesmus cannot be said to 
belong to any known order of Mammals, but it is also not a Reptile 
in the modern sense of the word. This animal shows, in its forearm, 
its caudal vertebre, and its centralia, such very low (although mam- 
malian-like) characters, that it ought to be placed between the 
Reptiles and Mammals. If not the “ Promammal” of Haeckel, it 
may perhaps have been a near relative of some such transitional form, 
whose existence and characters may be thus postulated on retro- 
spection. 
EXPLANATION OF PLATE XXX. 
Preepollex and Preehallux of Mammals. 
Figs. 1, 4, 5, nat. size. Figs. 2 & 3, slightly enlarged. 
. Right manus of Pedetes capensis, palmar surface. 
. The supporting skeleton of the same. 
. The supporting skeleton of the corresponding manus of Bathyergus 
maritimus. 
. Right manus of Theriodesmus phylarchus, Seeley. 
. Restoration of the carpus of the same. 
Fig. 
oe tobe 
Reference letters. 
ce\., ce.”, centralia. ev., cuneiforme. ep., epiphysis. lu.,lunare. mg., magnum. 
pi., pisiform (postminimus). pi.d., distal bone of pisiform. pi.p., proximal 
bone of pisiform. Pp., prepollex. Pp.d., distal bone of prwepollex. Pp.p., 
proximal bone of preepollex. /., radius. Se., secaphoid. 7d., trapezoid. ti., 
trapezium. w., unciform. U., ulna. I, II, III, 1V, V, metacarpals. 1, 2, 3, 
phalanges. 
May 21, 1889. 
Prof. Flower, C.B., LL.D., F.R.S., President, in the Chair. 
Mr. Sclater exhibited and made remarks on the mummy of a 
Faleon which had been obtained at Thebes in Egypt by Mr. Arthur 
J. Scott, F.Z.S., last winter. It was believed to be that of a Kestrel 
(Tinnunculus alaudarius). 
Mr. Sclater exhibited and made remarks on a series of photo- 
graphs, taken at Antipodes Island, south of New Zealand, by Messrs. 
Dougall, of Invercargill, New Zealand, and representing groups of 
the marine birds (Penguins, Cormorants, and Albatroses), and of 
the Sea-lions, which frequent that island for breeding-purposes. 
Mr. Sclater exhibited a drawing of a Leaf-insect living in the 
Society’s Insect-house, and probably referable to a not quite adult 
stage of Phyllium gelonus, Gray. ‘This specimen has been received 
