- Ill - 



of the timbo. The cardinal area of A, suboandeiaa reaches in front 

 of the Timho for a very short distance and in that ress^ect it hears 

 a resemblance to some Oalloarcas, hut this soecies has the iJeculi- 

 ar hinp-e of dent era , the tyrse of the section. The division of the 

 teeth into a short, more or less irregular anterior series and 

 l&nger, normal posterior series is somewhat similar to that found 

 in the section Ar.p-ina of the suhg-enus Scanharca . hut the p-eneral 

 facies precludes the possibility: of lin'iing a place for these 

 forms among the Ars-inas. V/ith regard to hinge elements Stenoarca 

 anpears to have much the oosition amoiog the Barhatias that Argina 

 has among the Scapharcas. 



