Ig2 KANSAS UNIVERSITY QUARTERLY. 
P. penetrans. The markings are more sharply defined and the 
ridges inosculate with each other but rarely. In P. penetrans the 
markings are more or less reticulate. In the anterior portion of 
the species under consideration the ridges are closely placed to 
each other, while posteriorly they become scattered and are not so 
well marked as in the anterior portion of the bone. The direction 
also becomes more varied in this region. On the posterior half of 
the inferior surface the ridges become less numerous and are 
larger than those on the upper surface and upon the sides. In 
P. penetrans there is no difference of marking on the superior and 
inferior surfaces. A part of one of the large teeth at the base of 
the rostrum is preserved. It presents a smooth enameled surface 
and probably had anterior and posterior cutting edges. 
The space intervening between the two teeth seems to be hardly 
so great asin P. penctrans. A point that I have noticed is, that all 
the figures and specimens show only one tooth on this portion, the 
alveola for the other seeming to be filled with bone or matrix. 
This would lead to the belief that these teeth were alternately 
functional. The rostrum as a whole is recurved and from this 
character the name of the species, recurvirostris, is derived. 
Locality; Niobrara Cretaceous, Gove county, Kansas. 
= 
Fig. 2. Right dentary of E. parvus. 
SS BS 
aes 
Se . 
reg 
ENCHODUS Agassiz. 
Enchodus parvus sp. nov. 
Represented by the right dentary of a single individual, No. 321. 
This species differs from &. shumardii Leidy in having nine or ten 
teeth upon the internal side of the dentary, and in having the most 
anterior of these smaller than in this species. The specimen is 
small as the name indicates. 
Locality; Niobrara Cretaceous, Gove county, Kansas; collector, 
EE NViest. 
Fig. 3. Right dentary of E. amicrodus. 
