Annals op the Transvaal Museum. 
81 
is about olie same as its breadth. It shows three facets, a large one for 
articulation with the femur, a very much smaller one for articulation 
with the ischium and a still smaller one for the pubis. All these facets 
are concave. 
The Hind-Limbs. 
Two femurs, the proximal end of a tibia, a bone which might be a 
fibula, and two tarsals, are the only bones recognised as belonging to the 
hind-limbs (Pi. XI). 
The Femur. — This a long bone with a broad proximal and distal end, 
the shaft being very narrow. The proximal articulation surface is broad 
and rounded on the inner side of the bone, becoming narrower towards 
the middle and gradually rounding down into a powerful ridge, running 
down the outer side of the bone for more than a third of its length. The 
front surface of the proximal end is hollow. The distal end is broad and 
seems to be thick. 
Dimensions : 
Length 212 mm. 
Great st breadth of the proximal end . 94 mm. 
Greatest breadth of the distal end 72 mm 
Narrowest part of the shaft. 30 mm 
The Tibia. — The proximal end of the tibia is nearly as broad as the 
distal end of the femur, the breadth being 66 mm. Distally it rapidly 
contracts to a breadth of 22 mm., where the distal end is broken off. 
The Fibula. — This bone is broad and flat proximally, while the distal 
end, which seems to be somewhat distorted, is thicker and not so broad. 
The shaft is slightly narrower than the ^distal end. The length of the 
bone is 137 mm., the breadth of the proximal end 52 mm., its thickness 
14 mm., and the breadth of the shaft 27 mm. 
I have much pleasure in naming this new form after its discoverer, 
Mr. A. W. Putteeill of Harrismith, Orange Free State. My thanks are 
due to the Director of the Albany Museum for the permission to examine 
the skull of L. Mccaigi. 
1. — Owen, E, 
2. — Broom, E, 
3. — Watson, D. M. S 
Literature. 
“ Descriptive and Illustrated Catalogue of the 
Fossil Reptilia of South Africa in the 
Collection of the British Museum.” XII, 
88 ; I-LXX. London, 1876. 
“ On the Eemains of Lystrosaurus in the Albany 
Museum.” Eec. Albany Mus., Yol. I, Pt. i, 
No. 2, pp. 3-8, PL I, fig. 3. Grahams- 
town, 24th April, 1903. 
“ The Skeleton of Lystrosaurus .” Eec. Albany 
Mus., Yol. II, Pt. 4, No. 8, pp. 287-295, 
PI. XY, XYI. Grahamstown, 26th March, 
1912. 
6 
