NKW ANU LITTLE KNOWN PALEOZOIC 
IIS 
Pi-atk XIX. 
Fifc- I Mtgaluhthys macropomus Cope, side of body and inferior surface of 
|,r«a. om*.f..urlli natural size; a, head from alx>ve, three-eighths natural size. From 
cullrfliuii II. 1>. lawtH*. 
Fig. '1. MacrtpnHus arenalus Cope, side of head and body one-half natural 
•iir: colh-ctioii K. I». Co|»e. Fig. 2a, head from above; 2^, mouth left side, some 
Itt'iii nupplittl from right side, natural size. 
Fib. 3. Lystratanthtis hystrix f N. and W., nat. size; from codec. F. R. 
Jellim-. 
Pi,atk XX. 
Fig*. 1-6. Styptolhisis acuieatus {lo\yo % coll. F. K. Jelliffe. Fig. 1, nat. size ; 
Figm much eiihirgiHl ; Fig. 2, ossecjus elements from mandible ; Fig. .3, anterior 
liBilli ; I, tiMtliaii, and 6, |M>steriur tooth. 
Fig. 0. i)(/t 0 <ius p/itntt^fHS Vo\n'\ nat. size. Coll. Geol. Survey of Te.xas. 
Fig. T-lll. lyrHOfiontidfr, teetlj, nat. size. Fig. 7, Mesodon damblei Cope, 
cull. (M-id. Survey Te.xaa. 8, L’ra»oplosus arctatus Cope; Mus. Academy, Philada. 
a. L‘. p/rt^drm Cu|m>.iIo. Ill, Coelodus broumii V.o\^v:, do. 8a, 9a, 10a. end views; 8-9, 
up|icr •••riea ; 7-10, low er iM»rie«. 
