Mr. A. R. Wallace on the Orang-Utan or Mias oj Borneo. 471 



The well-known accuracy of the late Mr. Sowerby makes it 

 needless to do more than repeat his statement, that the species 

 which he called eliitiur and concinna were found in the " Calcairc 

 grossier." ^\'hcther those species, or the S. decussata and ele- 

 yans of D'Orbiguy, are extinct, is another question, with which 

 Mr. Woodward Is probably not more familiar. 



If Mr. Woodward would take the trouble of reading again 

 my paper in the ' Annals ' for April, he will, or ought to, be con- 

 vinced that his remarks as to the separation of Schisinope from 

 Scissure/la were unnecessary and uncalled for, because D'Orbigny 

 and Sowerby evidently took their characters of what they re- 

 garded as the same genus from different and uucongenerie 

 species. 



My reason for wishing Mr. Woodward, instead of myself, in 

 the first instance, to refer to D'Orbigny, was simply that he, and 

 not I, might have the credit (if any) of making this separation. 

 1 am therefore sorry that he should have put such a strange 

 construction upon our conversation. 



I never heard of any " protest " from ]\Ir. Woodward until I 

 saw his letter in print. 



Yours obediently. 



J. GwYN Jeffreys. 

 Montagu Square, London, 21st May 1856. 



P.S. Since writing the above, Professor King has reminded 

 me that in his "Monograph of the Permian Fossils of England ^^ 

 (pp. 213 and 214), he satisfactorily made out Scissurella to be 

 the same as Pleurotomaria, and that Mr. Morris, in his " Mono- 

 graph of the Mollusca from the Great Oolite," follows him in 

 that view. It can hardly be said that these naturalists are also 

 "unacquainted" with the subject, so far as regards the palseon- 

 tological part of it. Professor King quite approves of the sepa- 

 ration of Schismope from Scissure/la, although he suspects the 

 former may approach too closely to Deslongchamp's genus Tro- 

 chotoma. 



XLV. — On the Orang-Utan or Mias of Borneo. 

 By Alfred R. Wallace. 



Having spent nine months in a district where the Mias is most 

 abundant, and having devoted much time and attention to the 

 subject, I wish to give some account of my observations and 

 collections, and particularly to record their bearing on the 

 question of how many species are yet known from Borneo. 



I have altogether examined the bodies of seventeen freshly 

 killed Orangs, all but one shot by myself. Of eleven of these 



