320 



The tree anterior extremities of the nasals (is») show nearly the same form and pro* 

 portions as in that Woodcut; their basal breadth, where the naso-premaxillary suture 

 ends anteriorly, is 1 inch 3 lines; the length of the outer margin is 1 inch in a straight 

 line, but is rather more following the curve. The lateral suture, as it extends along the 

 maxillary (si), shows a slight uniform curve, concave outward. A portion of the left fronto- 

 nasal suture (n-ii) indicates an oblique course from within outward and forward in about 

 the same degree as in Phascolomys platyrhinus, fig. 3. I have not seen such course, as a 

 variety, of that suture in any specimen or figure of the skull of the recent Phascolomys 

 latifrons. Other instances of combination in the smaller fossil Wombats, such as are 

 now under review, of characters which respectively specialize the Platyrhine and Latifront 

 Wombats will be adduced in the present memoir. 



The le ngth of the left nasal, as far as it is indicated by the preserved extent of its 

 suture with the frontal, is 2 inches 10 lines; the extreme basal breadth cannot be given, 

 on account of the side-fractures. 



The internasal suture seems to be partially obliterated ; and there is a narrow elliptical 

 vacuity with rounded margins, situated ten lines from the tips of the nasals, six lines in 

 length and two lines in extreme breadth, which seems to be natural, though probably an 

 individual variety. I shall return again to this fossil in relation to other characters. 



§ 7. Lacrimal, maxillary^ and palatal characters of Phascolomys Mitchelli, Ow. — So 

 much of the lacrymal (73) is fortunately preserved on the right side of the subject of Plate 

 L. fig. 3, t, as to indicate the affinity of the fossil to certain existing Wombats. This 

 bone, both in Phascolomys vomlatus and Phase, platyrhinus (Woodcut, fig. 5), developes 



Fig. 5. Fig. 6. 



A 



Lacrymal &c. characters, Phascolomys latifrons. 



a prominent tubercle above j* at its upper border, below the fron to-maxillary suture 

 (n-21). In Phascolomys latifrons (fig. 6) a feeble swelling of the lacrymal (73), where it 



