;J58 
PE HAM ELKS. 
a more or less triangular form, and presents but five tubercles, 
or sometimes four tubercles, of which three form the outer 
side of the tooth, and the fourth, which is larger, is placed 
opposite the middle one of these, and there is an inner lobe 
which is not produced into a pointed eminence. The incisors 
of the lower jaw approach more or less to the longitudinal in 
their direction, and are in contact with eacli other ; the four fore¬ 
most are deeper from the outer to the inner side than in the 
opposite direction ; the hinder one on either side is bilobed 
at its extremity. The canines arc moderate. The false 
molars scarcely differ from those of the upper jaw, hut some¬ 
times want the small anterior tubercle. The true molars are 
rather longer and narrower than those of the upper jaw; they 
present two external and two internal principal cusps, and a 
very' small anterior tubercle. 
The genus I saurian of Geoffrey and Desmarest is founded 
upon a supposed difference in the dental formula of Pcramelcs 
nasuta, and Perameles obcxula, which does not exist. That 
most excellent mammalogist, Desmarest, was but imperfectly 
acquainted with the P era nicies obcsula , and was misled (as 
was no doubt Geoffroy likewise) by the accounts given bv 
others of the dentition of that animal. 
Section 1. Macro fix. 
Macro its. Reid, Proceedings of the Zoological Society for December, 1836, 
„ Pt. 4, p. 131. 
Peragalea . Gray, in Appendix to Gray's Journal of Two Expeditions in 
Australia, vol. 2, p. 401. 1841. 
Ears very large ; auditory bull® in the form of a double bulb; 
tail long, and clothed with long hairs ; tarsus long, the 
metatuisiis clothed with hair beneath; innermost toe of the 
