444 
NKW AN1» IJTTIJ-: KNONV'N PALEOZOIC 
Measlkemexts. 
of 
Diatiioion* 
iiiiMliaii MTifi* of nix tectlj ; 
,, . ( anteroposterior; 
of t.M.tli ..f iiiul.lle series ■ . 
, . f anteroiiosterior ; 
.. “ •• second series 
( transverse; 
... . ( anteroposterior ; 
third series ^ 
J f 1 
MM. 
40 
6 
14 
5 
8 
5 
G 
This s|H-ri.-s differs fn»iii ll coltcaui in other characters besides the absence 
of the inlen-olnl.sl l.-elli. Tfins the teeth generally are closer together in U. 
anIalH*, nml the tmiisvers** extent of those of the median row is greater. 
TIh* «»nl\ sjsHMiiieii of this sjKi’ies known to me was found by Prof. A. P. 
of the I'niversity of I’einisylvaiiia. who accompanied me on an e.xpedition 
uiMleiinkeii ill the iiiteri'st of the Academy of Natural Science.s during the sunnner 
of IWEI. It was found ill ii iiiiiriiie lK*d of laiwer (,'retaceous age aljout six miles X. 
W of Fort Sii|i|ily, (fkhihoiiui. This Im-iI Prof. Brown believes to represent the 
<oiiiaiiche Peak lerniiie of the Flvdcricksinirg division of the Lower Civtaceous. 
rMikiiriiim • ri riTiixsM nil. iittv. l*Uir .\X, Kla. ». 
fUtahlishiMl oil a part of a palate from the .same locality and formation as 
I ardttiMi rhiK voiiier has the same aiigulate character as the latter sjiecies and 
like it. sii|i|Miris five series of t«*eth. It differs from U. arctattcs in the greater 
•|Niciii|t of the |is*ih, which an* randy in contact with each other, and in the form 
of the li'cth of the central row. Thew are strongly eoneavo in front, and convex 
|s»ieriorly. giviiiitthe foriii of a cn*s<viit. with the horns obtusely rounded. The 
sin- i» also iiiiicli h-ss. the transvcrsi- width of the three median series of teeth, 
eipMliiiit that of the cent ml m-rics of C arctaius. But size alone is not a good 
rnlervin of s|NTifH* diflcrciice in fislic.-*. 'flie cniwiis are more worn however, than 
Unsseof the Innn- sja-cics. but this is in part due to attrition in moving water. 
• I 'Tn only re-pre.sented by fragments. The crowns of 
■"“'•Ho „„r„, „ ,t.g„l,„.|v co„«.x smooth suifnco. 
Is-iiBtli ..f f..iircn.»i,s of rir,i |au.„| . 
MM. 
row ; 
16 
f anteroposterior; 
4 
1 transverse; 
7 
( an tei-o posterior ; 
3-5 
1 transvurse; 
4 
