Am. Jour, Sci., Vol. XVII, 1904. 



Plate IX. 



Propleura borealis, sp. nov. x|. 



N, Nuchal ; 1, 2,— 1st and 2d Neurals ; Lm 1-3, 5, 6,— Left Marginals ; M2, 3, 5-7,— Eight 

 Marginals; E. P. 1, 2, 4. 5, — Eight Pleurals ; L. PI, 3, — Left Pleurals; H, Hyoplastron ; 

 Hp, Hypoplastron : X, X, — Xiphiplastra ; L H, Left Humerus (dorsal view) ; P, Pubis ; II, 

 Ilium ; Is, Ischia. — Nuchal, and 1st and 2d vertebral horn shields, in ink outline. 



