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



Plate VII. 



Plastral view of Osteopygts Gibbi Wieland, x i. — Drawn from type. 



en, Entoplastron ; hy, Hyoplastron ; hp, Hypoplastron ; acp, Xiphiplastron ; 

 /, /, Plastral Foramina ; m2, axillary buttress and 2d Marginal ; m8, inguinal 

 buttress and 8th Marginal ; N, Nuchal ; 1, 9, 1st and 9th Neural s ; Pa, Pygal, 

 anterior ; Pp, Pygal, posterior ; Pm, Pygal Marginal ; i, First Rib ; n, iv-viii, 

 Pleuralia ; ( + ), point of iliac support on 8th pleural ; sc, supracaudal horn shield. 



