2 S.MrillSONI.W , MISCELLANEOUS COLLECTIONS VOL.54 



Skull. — The skull agrees with that of S. cauipestris and S. mcarnsi 

 in general size and aspect. From that of the former as figured by 

 Peters^ it is readily distinguishable by the much greater forward 

 extension of the incisive foramina, and the narrower interorbital 

 region. From that of the latter it dififers in the broader rostrum, 

 more nearly parallel supraorbital ridges, longer, less rapidly diverg- 

 ent pterygoids, smaller ectopterygoid plates, and by the absence of 

 well-defined pits and median ridge at posterior margin of palate, the 

 posterior palatal foramina opening practically on general palatal 

 level. 



Teeth. — The teeth agree with those of Saccostouius mearnsi and 

 dififer from those of the South African species as figured by Peters, 

 in their large size, the greatest transverse diameter of m' decidedly 

 more than half greatest width of palate between toothrows. Pattern 

 of enamel folding as in S. mearnsi, but reentrant angles on anterior 

 border of second and third lamin?e of m' and of anterior (second) 

 lamina of m^ better defined. 



Measurements. — Type: head and body, 136; tail, 55; hind foot 

 (dry), 19.6. A second adult female: head and body, 133; tail, 60; 

 hind foot (dry), 19.6. Skull of type: condylobasal length, 33.0;- 

 zygomatic breadth, 17.2; interorbital constriction, 3.8; occipital 

 breadth, 13.8; depth of braincase at middle, 9.0; nasal, 16.4; dias- 

 tema, 10.4; mandible, 22.0; maxillary toothrow (alveoli), 6.2; man- 

 dibular toothrow (alveoli), 5.8. 



' Reise nach Mossambiqne, pi. xxxv. fig. 12. 



" Possibly a minute fraction of a millimeter too short. 



