STEWART: ICHTHYIC FAUNA OF THE KANSAS CRETACEOUS. 27 
MEASUREMENTS. 
MM 
Benationmaxillanprand spremaxillataye ners ieee el tetaetereslel- i cis les (tort te 161.5 
DepinoL bone posterior tonpalatme Concdylewy ciara p seit ae skein l ore 44.5 
Height of palatine condyle above the alveolar border................... 48.5 
ILiSvae(ol One jareeiooaexillllaycigs wooUKENG Olan seers cncc.a aqui > ace bin CDE ROO oes 3.5 
PEL A CME 1S tt O la GLOW Miers ait ele stereraiateicneye betes tse siaaeisietetebane onielsts crete iatele cee 3.9 
ANeLge anterior posterior length Of CrOWN 2)... acme ewe dsl) oe seals ess « 3 
MANDIBLE. 
Bencihwom mandible: irom cotyloidicavity)- 2-1 «sce rise © ieee 2 © 161 
Wet aioaGie alveolar wOOKdeh aac erie coms Gr staserspcuelon ahaa ews, Make eke 140 
ELE MSA ON GrOnviay, jNCRWEIAMOS Goebagouneadoeenane buecoueoceeoucneS 6 
Average anterior posterior length of crown, posterior................... 4.4 
Deyo CH Foresalemieilll SURES. Sco ooo coma SoD ode conoomonncaquoobadocouC 33 
Wemiieail aleyoudn yr omic alana ose oe eeoHo anos a uaueon enon oUCOeMnnoh do dome 13 
IP Ree einiyay, elGinetl ns Oo era aieeoR Bint ons ero oe Oeio os GEN on Ooe One Ibar ratiar 29.5 
redentaiy me Cepuien asa erst pichos mm ork in) meinen Medd a ndeTy ate tebe tess cape al cya oh cor 34 
Protosphyrzna bentonia, sp. nov. 
Established upon the rostrum, and numerous fragments of bones 
whose identity cannot be determined. These were found by Dr. 
S. W. Williston in the Lincoln Marble on Rock creek in southern 
Mitchell county. The low horizon from which the specimen was 
obtained attaches special interest to it as it is the first species 
described from below the Niobrara Cretaceous. 
The proximal portion bearing the larger ethmoidal teeth is not 
preserved. The base is broad, becoming more narrow toward the 
distal extremity, where it suddenly contracts, forming a rather 
blunt apex. In P. penetrans the bone gradually contracts to an 
acute point. The anterior portion is oval in outline instead of 
semicircular as in the above, nor does it have the flat superior 
surface of this species as described by Cope.+ The lower surface 
contracts more rapidly than the upper, causing the apex to be above 
the center of the shaft. The inferior and superior surfaces gradu- 
ally grade into each other laterally and are not separated by the 
obtuse angular ridge found in P. xiphotdes. The outer surface, 
where preserved, shows the rostrum to be covered with irregular 
longitudinal ridges which send out branches to each other, and 
giving the outer surface of the bone the appearance of net work. 
The other bones are too fragmentary to identify. 
*Estimated. 
+Bull. U.S. Geol. Surv. Terr., Vol. [II. No. 4, p. 822. 
