112 FOSSIL JAWS OF MACROPODIDJ-:, 



Molars. — (PL xvii. fig. 17). From the intero-anterior angle of 

 each lobe a low fold descends obliquely to or towards the middle 

 of the anterior base of the lobe, and on the triangular face of the 

 lobe lies a small ascending fold similar to those in ^iheniorics. 

 Previous knowledge of these folds is required for the recognition 

 of traces of them left in the aging mandible. The basal talon is 

 a distinct ledge-like protuberance. 



Exa7nples — six or aight. 



An adolescent right ramus with the first four cheek-teeth, the 

 type — A right aging ramus with all the cheek-teeth — P.^ in a 

 fragment of a right adolescent ramus — M. * in a portion of an aged 

 left ramus— Part of an adult left ramus with m.^, m.- — And a 

 portion of a young left ramus with m. -. To these may be added 

 two maxillary fossils which perchance belong to the species. 



Halmaturus indra, n.s. 



Molars with crests moderately curved, angles subrotund, and 

 links feeble. The lower permanent premolar sul)triangular, with 

 a large intero-posterior cusp; the deciduous short, broad, convex 

 exteriorly. Molars smooth, without posterior groove or distinct 

 talon. 



Dimensio7is. 



Mandibular. — Young: P."', mp.^ m. ^ measure 23'1; p. "^ 6'4; 

 p. ^ immature 7*7. 



The long dimension of the teeth is the same as in //. cooperi. 



Form. 



Mandibular. — P.^ (extracted) (PL xvii. fig. 19), subtriangular, 

 with a large intero-posterior cusp, separated from the posterior 

 surface of the lobe by a broad vertical groove. Outer surface of 

 crown impressed and bearing a low broad mesial rilj; anterior end 

 of crown with a horizontal groove between base and lobe. Crest 

 central, not curving inwards posteriorly. 



P.'^ (PL XVII. fig. 18) short, broad, basal outline biconvex, 

 diameters 6-4 x 4-5. Crest towards the inner and flatter side. 



