260 MESSRS. O. THOMAS AND H. SCHWANN ON [Apr. 18, 



grey sulbterminally, the tips l^lack with a greenish iridescence. 

 Sides rather lighter, but without rufous tinge, which is however 

 present in specimen ISTo. 874. Under surface dark grey (" mouse- 

 grey "), a narrow median line rather darker. Chin dull whitish, 

 which colour extends u.p wards on each side on to the cheeks. 

 Crown and top of muzzle browai, finely flecked with white, and with 

 a patch about 2 mm. in diameter over each eye. Limbs grey like 

 the lower surface, the wrists lighter. 



Skull similar in shape to that of A. hottentottus, but markedly 

 smaller throughout. 



Teeth : second and third incisors and canine similar in shape, 

 the last-named not markedly more triangular in section. First 

 premolar (PI. XYI. fig. 1) triangular, not elongated transversely. 

 Two posterior premolars, and the molars, quite separated from 

 each other, broad transversely, very narrow antero-posteriorly, the 

 outer cusps little developed, so that the outer antero-posterioi- 

 diameter of p'* is only about I'l mm. In No. 874, which we 

 suppose to show the milk- dentition of the same species, this last 

 diameter (including the prominent antero-external cusp) is about 

 1-5 mm, (see PL XVI. fig. 1). Below, the last two premolars and 

 the two molars have each a low posterior basal ledge, off which a 

 small cusp may have been worn. No. 874 has the usual distinct 

 posterior basal cusps. 



Dimensions of the type (measured in the flesh) : — 

 Head and body 116 mm. ; hind foot (s.u.) 13. 

 Skidl — greatest length 25-4; basal length 20; greatest breadth 

 15'6 ; greatest height 12'3 ; interorbital breadth 8 ; front of i^ to 

 back of m^ 10 ; palate, breadth across premolars 8" 7. 

 Hah. Umvolosi Station, altitude 50 m. 



Tyi)e. Adult male. B.M. no. 4.12.3.9. Original number 873. 

 Collected 16 September, 1904. 



This distinct species may be readily recognised by its smaller 

 size, as compared w'ith A. hottentottus. From A. obtusirostris it 

 differs in having its upper anterior premolars of a distinctly pre- 

 molariform shape, Peters's species apparently having them of the 

 molariform outline also found in A. chrT/sillus, described below^ 



These three specimens are of particular interest as illustrating 

 the very late change of dentition in the group, recently discovered 

 by Prof. Leche* in Ckrysochloris asiaiica. 



While examining Mr. Kudd's specimens we have compared all 

 the Museum examples of Amhlysoraus hottentotti's, and find that 

 the form found in Pondoland difiers so much in colour as to 

 deserve subspecific recognition. It might be called 



Amblysomus hottentottus PONDOLiiE, subsp. n. 

 Similar to true A. hoitentottzis in size and other essential 

 characters, but tlie dorsal area, from crowai to rump, is glossy 



* Zool. Anzeigei-, xxyii. p. 219 (1904). "We owe to the Idndness of Prof. Leche a 

 drawing of a milk-premolar of the specimen he described. 



