106 



pilheci, until by an examination of ifs posterior molars its real station 

 iii the system should be determined. 



It is thus characterized : 



Semn.? ALBOGULARrs, Sykes. Semn.? supra Jiavo nigrocĮue, 

 infra albo nigroąue irromtus ; gulei ulba; arliihus nigris : mysta^ 

 cibus latis aures pene obvelantibus ; supercUioruni pilis rigidis 

 exstafitibus. 



Hab. in Madagascar ? 



Its caniiies are remarkably long (nearly į of an inch), slender, 

 sbarp; the incisors very short and even. Head rounded and short. 

 Ears very small, nearly rounded, and for themost part concealed in 

 tbe long hair about the head, Eyes deeply seated, and shaded by a 

 contiiuious arch of long hairs directed t"orwards. Irides broad; of 

 a brown ochre colour. Hair forming a bunch on each cheek and 

 resembling vvhiskers : no beard. Cheek pouches rudimentary only, 

 not observable externally, even vvhen fiUed, being concealed by the 

 bushy hair of the cheeks. Thumbs of anterior hands short and dis- 

 tant ; those of the posterior long. Whole of the upper surface of 

 the animal of a mingled black and yello\vish ochre colour, each 

 hair being banded black and ochre ; the black prevailing on the 

 shoulders, the ochre on the back and flanks. Under surface griz- 

 zled vvhite and black. Anterior lirabs uniform black ; posterior black 

 with a little of the dorsal colour. Chin and throat pure white. 

 Tail black, half as long again as the body. 



The manners of tliis monkey are grave and sėdate. Its disposi- 

 tion is gentie but not aflFectionate : free from that capricious petu- 

 lance and mischievous irascibility characteristic of so many of the 

 African species, but yet resenting irritating treatment, and evincing 

 its resentment by very smart blovvs with its anterior hands. It never 

 bit any person on board ship, but so seriously lacerated three 

 monkeys, its fellovv passengers, that two of them died from the 

 vvounds. It readily ate meat, and vvould choose to pick a bone,^ 

 even when plentifully supplied with vegctables and dried fruits. 



Mr. Gray exhibited a specinien of a Tortoise vvhich he regarded 

 as the type of a new genus in the family Emydid<e. It is charac- 

 terized as follows : 



Platysternon. 



Slcrnum latum, antice truncatum, postice emarginatum. Scutella 

 stemi 12; quoruni duo anteriora brevia, luta, perstotam sterni 

 latitudinem exlensa. Si/mpkysis scutcllorum pcctoralium abdo- 

 minaliumque extremitatibus tecta : sculellis axillari inguinalique 

 magnis ; inter quce scidellum tertiiim acccssorium iis simile ; scu- 

 tella hcEC tria in suturam symphysis inserta. 



Caput maximum, cute corned continud tecttim. Cauda longissima, 

 teres, atteniiata; stiperne serieunica, injerne dnplici, squaviarum 

 tecta ; haitd cristata. 



This genus is intermediate betvvcen Einys and Chelydra. It has 



