Annals of the Transvaal Museum. 
109 
at Rosslyn, that there is no doubt as to their being of a different species ; 
in all respects they most closely resemble the small species (No. 200 in the 
List), the difference being a matter of size only. 
Text fig. 12. — Skull of Georychus mahali , ,sp. nov., from dorsal aspect. 
Type specimen : a T. M. Cat.., No. 1272. 
Of the larger species mentioned above as having been taken at Rosslyn, 
one specimen is an old female and two others young females with the 
hindmost molar just beginning to push its way out. These measure as 
follows : — 
Old $. Young 
H. and B. 
150 
145 
Hd. ft 
26 
25 -26 
Inc. cond. leng. 
40-2 
36 -37-2 
Nas. cond. leng. 
36 
32-8-33*8 
Zyg. br 
26*5 
24 -26 
Br. premax. 
8 
6-8- 7 
Int. orb. br. 
7*5 
7-5- 7-8 
Br. brain case ... 
16 
15-3-15-5 
Nas. leng. 
15 
12-5-13-4 
Nas. br.... 
4 
3-1- 3-2 
Mol. ser. 
6*7 
— 
Diastema 
12*5 
11-2-11-4 
Br. incisors 
5*5 
4-5- 4-6 
Br. mol. 
6-9 
5-4- 5-7 
These large specimens appear to be referable to G . anornalus , in all 
but the greater breadth of the nasals in the single old female. I have 
already remarked in regard to G. anornalus when describing that species 
( vide p. 97), that in some cases the premaxilla does not extend beyond the 
back of the nasals. In this old female, the back of the nasals is squared 
and the premaxilla does not extend backwards ; but in the two younger 
specimens this is not so, the premaxilla extending slightly backwards 
beyond the nasals ; whether the later development would have produced 
a similar shape to that of the old female is of course open to question. 
