142 DR. J. ANDERSON ON A NEW CETACEAN. [Feb. 7, 



Sciurus quinquestriatus, n. sp. (Plate X.) 



Above grizzled olive, brownish grey, with a distinct rufous tint, 

 deepest on the dorsal surface ; annulation fine, as in the grizzled 

 Squirrels generally ; chin and throat obscurely grizzled greyish, 

 washed with reddish ; a rufous grizzled blackish-brown band from 

 the chest along the middle line of the belly to the vent ; external to 

 this, on either side, a broad pure-white well-defined band from the 

 side of the chest, along the belly, and prolonged along the inguinal 

 region to the vent ; a broad black band from the hollow of the axilla 

 along the side of the belly, expanding on the inside of the thighs, 

 where it is faintly washed with greyish ; inside of the fore limbs black- 

 ish, washed with greyish ; toes black, with rufous anuulatious. Tail 

 nearly as long as the body and head, concolorous with the body, but 

 the black and rufous annulations much broader and more marked, 

 assuming the form of indistinct rufous and black rings on the poste- 

 rior third ; tip of tail jet-black, narrowly terminated with greyish. 



Length from root of tail to snout 9"039 ; length of tail 7075 ; 

 skull, from anterior margin of occipital foramen to base of incisors, 

 r062; interval between first molar and incisors T050; transverse 

 distance between first molars 00/6 ; breadth between orbits 0'076. 



This is a hill species, common at Ponsee, on the Kakhyen range 

 of hills, east of Bhamo, at an elevation of from 2000 to 3000 feet. 



9. Description of a new Cetacean from the Irrawaddy River, 

 Burmah. By John Anderson, M.D., F.L.S., F.Z.S., &c, 

 Director of the Imperial Museum, and Professor of 

 Comparative Anatomy, Medical College, Calcutta. 



[Received February 7, 1871.] 



Delphinid^e. 



Orcella *. 



Orcaella, Gray, Cat. Seals and Whales Brit. Mus. 1866, p. 285. 



Head round, globular, slightly pointed when viewed from above ; 

 forehead full, projecting a little beyond the mouth ; blow-hole 

 transversely crescentic, convex posteriorly. Pectoral fin of mode- 

 rate size, not elongate, but somewhat poiuted ; dorsal fin placed 

 behind the middle of the body. Fingers moderately short ; length 

 of index equal to the distance between its base and the head of the 

 humerus. All the bones of the fingers broader than long, except 

 the proximal ones of the index and third fingers. 



Skull subglobular, high. Rostrum short, tapering ; breadth of 

 base considerably more than half the breadth of the cranium ; 

 length nearly equalling the length of the remaining portion of the 



* Dr. Gray writes the name of this genus Orcaella, but for euphony's sake, and 

 to avoid transgression against the laws of Latinity, I suggest Orcella. 



