336 



DIDBLPHTID*. 



in the table on p. 341. As a rule the southern speeimens are markedly- 

 larger than those from Guiana, but specimen d from Maldonado 

 has a skuU exactly matching in every way that of specimen a from 

 Demerara. The type of B. turneri differed from all the known 

 species in having only four upper incisors on each side, but speci- 

 mens since received from the same locality show this to have been 

 an abnormality. 



JAd. al.l , 

 ] Skull, f °- 

 lAd.sk. I o 

 ] Skull, f ¥• 



c. Ad. al., $ . 



, jAd.sk.) 

 ^- j Skull. \ 



Skeleton. 



Ad. sk.cJ, 18/6/76, 



Better Hope, Demerara. 



Better Hope, Demerara. 



(Ti/pe of 

 San Lorenzo, Eio Grande 



do Sul. 

 Maldonado (C. Darwin). 



(Figured in Zool. Voy. Beagle.) 

 La Plata. 

 Belgrano, Buenos Ayres. 



{i*„lf-[ $, 5/3/77. Belgrano. 

 1 gulf i^' 25/2/77. Belsrano. 



Yg.sk., c?, 4/85. 



Ad. St., cJ. 



JAd. St. t 

 jSknU. f 

 Skeleton. 



Morino, Buenos Ayres (F. 

 Withinffton). 



Rev. W. Y. Turner 



Rev. W. Y. Turner 



[C.]. 

 D. turneri, Giinth.) 

 Dr. H. von Ihering 



[0.]. 

 Zool. Soc. 

 Beagle). 



(Voy. 



Bravard Coll. 

 H. Dumf ord, Esq. 



no.]. 



H.I)umford, Esq. 



[0.]. 

 H. Dumford, Esq. 



.^1^ 



P. L. Sclater, Esq. 



[P.].' 

 Sir J. Richardson 



[P.]. 

 Purchased. 



Zool. Soc. 



III. Subgenus PHILANDER. 



Type 

 D. phQa: 



Philander, Tiedem. Zool. p. 427 (1808) * D. phUander. 



Size medium. Proportions of hind toes as foUows : — 4th the 

 longest, 3rd and 5th next, about equal, 2nd the shortest, but only 

 slightly so. Pouch rudimentary. Fur soft, thick and woolly. 



&lciM with a large broad brain-case, its most constricted point 

 close behind, or even hidden beneath, the large triangular postorbital 

 processes. Temporal ridges not uniting to form a median crest, even 

 in old specimens. Palate complete. Ramus of lower jaw beneath 

 the cheek-teeth peculiarly high, thin transversely, and sharp-edged 

 below. 



Teeth. Upper canines unusually long and little curved , P.' minute ; 

 p.' smaller than p." Molars small, rounded, decreasing in size back- 

 wards, the posterior upper ones bowed inwards, so that the broadest 

 point of the palate is at the anterior corner of m.', instead of the 

 posterior. 



* Originally used for all the OpoBsums, but restricted by Burmeister (Erlaut. 

 Faun. Bras. p. 74, 1856) to the species now included in this subgenus. 



