318 MEMOIRS OF THE CARNEGIE MUSEUM 



Subfamily Tetragonopterin^e. 



As a full account of the Tetragonopterinae is about to be published in the 

 Memoirs of the Museum of Comparative Zoology, the account of these species given 

 in this work is, therefore, made brief. 



Tetragonopterus Cuvier. 



" Tetragonoptrus " Artedi, in Seba, Locupl. Rer. Nat. Thes. Ace. Descr., Ill, 



1748, pi. 34, fig. 3. 

 Tetragonopterus Cuvier, Regne Animal, II, 1817, 166 (argenteus). 



Type, Tetragonopterus argenteus Cuvier. 



Fig. 37. Tetragonopterus argenteus Cuvier. No. 20718 Mus. Comp. Zool. 



The depth at least half the length ; humped at the occiput ; concave over the 

 eyes; premaxillary teeth in two rows, those of the outer series small, of nearly 

 uniform size, the row more or less regular, those of the inner series larger, graduated, 

 multicuspid, the cusps of each tooth arranged in a curve, the middle cusp much the 

 longest; several large, graduated, pointed teeth in the front of the lower jaw, and 

 abruptly minute teeth on the sides; maxillary with or without teeth on its upper 

 anterior edge; preventral area flat, bounded by sharp angles; a median series of 

 scales on the breast. 



