REPTILIA OF KIRTLAND FORMATION GILMORE 



Table 1. — Mcastircments of vertchral scutes of Baena ornata 



167 



The sulci are plainly impressed, except on the left side. The 

 sutures, however, are entirely obliterated. The nuchal of the type 

 is trapezoidal with the widest side anterior; in a second specimen 

 (U.S.N.M. no. 12821) it is rectangular. It has a length of 14 imn 

 and a greatest width 

 on the free border of 

 60 mm. 



The vertebral 

 scutes a r e wider 

 than long. Their 

 principal d i m e n- 

 sions are given in 

 table 1. The shape 

 of the carapace and 

 the arrangement of 

 the dermal scutes 

 ai*e clearly shown in 

 figure 7. 



The emargination 

 on the posterior 

 border is about 95 

 mm wide. The plas- 

 tron is completely 

 preserved, but as 

 with the carapace 

 none of the sutures 

 can be traced, and 

 the sulci on the 

 outer parts of the bridge have been obliterated. The median part of 

 the plastron is broadly hollowed out, indicating the male sex of the 

 type specimen. The plastral surface is evenly sculptured by a series 

 of shallow pits, surrounded by low, round-topped ridges. The pits 

 are of irregular shape and size but present a fairly uniform rough- 



116009—35 2 



Figure S. — Plastron of Dnena ornata, new species. 

 Type. U.S.N.M. no. 13229. al). Abdominal; an, anal; 

 fern, femoral ; g, gular ; hum, humeral ; in.m, Inframar- 

 ginals ; pec, pectoral scute. About one-sixth natural 

 size. 



