276 BUREAU OF AMERICAN ETHNOLOGY ** [bdll. 52 



The new species differs from Homo primigenius also "by the absence 

 of progna.tliism,[i] by the more human conformation of the denture, 

 and by an absohitely different conformation of the anterior region 

 of the skull. P] It is therefore a new species of man, which I have 

 designated by the name Homo sinemento. 



"With this, we have in the Pampean formation, without taking 

 account of the Homo sapiens of the uppermost strata, four distinct 

 species of Hominidse, namely the Diprothomo platensis, the Homo 

 pampseus, the Homo caputinclinatus and the Homo sinemento. These 

 four species show among themselves differences much greater than 

 those which we observe among the actual human races that are 

 farthest apart. This not merely proves specific differences but also 

 brings new evidence for the South American origin of man, because 

 it is here where he acquired his greatest diversification and where he 

 was represented by the greatest number of species." 



A brief note only on the Arroyo de Moro specimens is found in the 

 recent paper on the Argentine fossil man, by Mochi.^ He did not 

 have time to study the remains relating to H. sinemento, but what he 

 saw made him doubt the validity of the new species. 



OBSERVATIONS BY THE WRITER 



In June, 1910, the locality of the find was visited by the party 

 consisting of Srs. F. and C. Ameghino, Mr. Willis, the gardener 

 Parodi, the sailor from the cJiata, and the writer. 



The place was found to be in the inland terminal part of a long, 

 irregularly outlined, denuded flat or playa,* lying witliin the belt of 

 barren, moving sand dunes, near the small lake Malacara, far from 

 any human settlement. One whole day and parts of two others were 

 spent in the examination of the spot and the vicinity. The following 

 is a transcription of the principal notes made there by the writer. 



The "skeleton playa" ^ is a somewhat broadened end portion of a 

 long denuded depression, wliich connects with a barren flat that 

 reaches down to the beach. It is situated in the midst of the sand 

 dunes, slightly nearer the open land than the sea. 



The surface of the playa is grayish and blackish, with irregular 

 remnants of a former level, 1 to 2^ feet (about 30 to 75 cm.) high. 

 Below the discolored surface the earth is yello\vish loess. Here and 

 there within the loess are seen streaks of tosca. 



The irregular earth banks, when cut, show color and composition 

 wliich appear to be similar to those of present surface of the playa; 

 but in one of the elevations, about 2^ feet high, not far from the spot 



1 Compare previous lines. — A. H. 



2 This probably refers to its narrowness antero-inferiorly. — A. H. 



3 Mochi, A., Appunti suUa paleoantropologia argentina; in Arch, per VAnfr. e la Efn., XL, Firenze, 

 1910, p. 253-254. 



* Seep. 112. 



s For convenience the depression in which the find was made will be referred to under this term. 



