SIMIA SYNDACTYLA. 



arovind the orbit, and fomtiing a short tube surrounding the eye. The temporal- 

 ridges on each side are very prominent, and run parallel to each other from the 

 frontal-margin to the occiput, separated about one inch. The posterior part of 

 the skull is terminated abrviptly by a plain svirface, which is bounded by a promi- 

 nent ridge The teeth exhibit the following particulars : — In the upper jaw, the 

 intermediate front teeth are short, broad, and subconvergent ; the next on each side 

 is distant and narrower. The canine teeth stand separated from the other teeth, are 

 very large at the base, and although in the specimen the points are broken off, they 

 have the appeai-ance of having projected far beyond the other teeth. There are two 

 bicuspidati and three quadricuspidati on each side, having the general form of these 

 teeth as well in the Simla Satyrus of LinuEeus, as in man ; their surfaces are much 

 worn by tritviration. In the lower jaw the front teeth are disposed uniformly, 

 with a small space between each ; here the two intermediate teeth ai'e smallest, and 

 they are generally narrower than the front teeth in the vipper jaw, and much worn 

 by trituration. The canine teeth greatly exceed the front teeth in length ; they 

 tend obliquely outward, and have an additional projection or gradus at the base. 

 The first grinder in the Siamang, as well as in several other Quadrumana from the 

 Eastern Islands, has a character essentially different from the first bicuspidatus in 

 man. It presents one high, acute, conical or pyramidal point, projecting consider- 

 ably beyond the second bicuspidatus, with an oblique edge, corresponding to the 

 fcanirie tooth in the upper jaw, with a less prominent tubercle near the base. The 

 second bicuspidatus has the same form as the corresponding tooth in the u.pper jaw ; 

 to this follow, on each side, three quadricuspidati, resembling those in the upper 

 jaw, and equally worn on the surface-by trituration. 



A comparison of the skeleton of a young svibject of Simla syndactyla, lately 

 obtained fi-om Sumatra, and of an adult skeleton of Simla Lar, having been afforded 

 to me by Joshua Brookes, Esq. at his Mviseum in Blenheim Street, with distin- 

 guished hberality, I am enabled to add the following remarks in further illustration 

 of the bony fabric of our animal. — The head in the Simia syndactyla is more rounded 

 posteriorly ; it has an obovate form, and the orbital-margins and temporal ridges less 

 developed. The canine teeth extend but slightly beyond the front teeth. Of 

 three grinders, which are as yet apparent, the two posterior are quadricuspidati, 

 with considerably projecting points; and the secondary fi-ont teeth present a serrated 

 margin, as they do in man on their first appearance. The bones of the anterior 

 extremities are proportionally longer than in Simia Lar, and extend beyond the 

 malleolus quite to the ground ; the bones of the thumb are also more lengthened and 

 slender. The skull of the adult Simia Lar agrees strikingly with that of the adult 

 Simia syndactyla : it has the same oblong form ; the orbital-margins, and the annular- 



