18 MR. G. E. DOBSON ON THE MOLOSSI. [Nov. 7, 



(3. The first upper premolar external 

 to the tooth-row. 

 y'. Lower third of the ear-keel 

 slightly thickened, not flat- 

 tened externally. 



y". Tragus quadrate 10. N. angolensis, p. 724. 



S'. Lower third of the ear-keel 

 much thickened and flattened 

 externally. 



6". Tragus narrow, much 

 longer than broad, round- 

 ed off above 11. N. miarensis, p. 725. 



e". Tragus quadrate 12. N. mops, p. 726. 



e'". Ears conjoined by a very deep band 

 anteriorly, and, posteriorly, by a 



second low band 13. N.johorensis, p. 726. 



b. Integument of the ears thin, translucent ; keel 

 of the ear-conch slender, deep, bent back- 

 wards on itself. 

 a'. Antitragus separated by a deep notch ; lower 

 incisors 4. 



a". Muzzle thick, not concave in front of the 



eyes ; upper lip with vertical wrinkles. 



a'". Ears separate ; a large gular sac ... 14. N. australis, p. 728. 



b'". Ears united by a low band near the 



extremity of the muzzle ; no gular 



sac 15. N. megalotis, p. 728. 



b". Muzzle concave between the eyes and ex- 

 tremity of the nose; upper lij) fur- 

 rowed by deep oblique wrinkles ; ears 

 united on the forehead slightly in 

 front of the eyes ; no gular sac. 

 c'". Ears united by a deep band, anli- 



ti'agus much longer than high ... 16. N. macrotis, p. 729. 

 d'". Ears united by a low band ; anti- 

 tragus as high as long 17. N. gracilis, p. 73 1 . 



b'. Antitragus separated by a very shallow notch ; 

 lower incisors 6. 

 c". Muzzle flat in front of the ears ; upper 

 lips with vertical wrinkles. 

 e'". Ears separate. 



a. Tragus quadrate, broad above ; 

 first upper premolar in the 

 centre of the space between the 



canine and second premolar ... 18. N.brasiliensis, p. 73L 

 (i. Tragus triangular, narrow above ; 

 first upper premolar larger, 

 filling up the space between the 

 canine and second premolar ... 19. N. iiorfolccnsis, p. 732. 



Antitragus separated by a very shallow notch, 

 lower incisors 6. 

 d". Muzzle flat or rounded off above ; upper 

 lip with ill-defined vertical wrinkles. 

 /'". Ears separate, tragus triangular, 

 rounded oil' above. 

 a. Ear broad above, upper third of 



the inner margin straight 20. N. aUriventer, p. 733. 



/3. Ear narrow above, upper third of 



the inner margin deeply concave 21. N.acetabulosus, p. 734. 



