6p new south walks. 160 



the main points of difference. The interorbital space has a slight 

 longitudinal groove, the operculum is not longer than deep, and 

 has an angular protuberance beneath, the distance from the 

 posterior margin of the operculum to the root of the pectoral is 

 much greater than to the anterior margin of the orbit, there is no 

 black longitudinal band, and the lateral plates of the cuirass 

 differ both in size and number. According to my estimate also 

 there is a considerable difference in the formula of the fins, that 

 of ^. slrirjaia Gunth. being D. 3/io, A. 12, C. 10, P. 12, V. 4, 

 while that of the present species is D. ^/jo, A. 10, C. 10, P. 11, 

 V. 4. 



On Macrodontism. 

 By N. de Miklucho-Maclay, Hon. Memb. Linn. Soc. N. S. W. 



Plate 18. 



The copy in " Nature " (Vol. XVI., No. 404) of the sketch of 

 an Islander of Taui*, which I had sent in 1876 to Professor R, 

 Virchow in Berlin, is such a perfect caricature that lam induced, 

 in consideration of the great anthropological interest of the sub- 

 ject, to lay before the Society a correct lithograph of my original 

 sketch, with some remarks on this peculiarity, which I shall call 

 Macrodontism {fjLaKpoBovTCcrfio<^) . 



I commence with an extract from my first letter on this subject 

 to Professor Virchow, which has been kindly translated into 

 English by Mr. C. L. Sahl, Imperial German Consul in Sydney. 



" 15 June, 1876. 

 " Archipelago Ninigo (or Echiquier), 



" 1° 23' south lat., 144 east long. 



" Going south after my visit to Western Mikronesia, I came to 

 the Admiralty Islands, which are as yet little known. I con- 

 tinued there my anthropological studies, and devoted my atten- 

 tion to an important anatomical peculiarity of the natives (who 

 belong to the Melanesian Race) and obtained some unexpected 



* Taui or Admiralty Islands. 



