SKW A 
Nl» IJTI'I.K KNOWN PALEOZOIC’ 
Aomm' 
: .. <iuli sDiiie referable to the genus Listva- 
“'-•-7;;;;: r ....a w. 1 , i. wen 
N i.nn « “'I- For the greater part of the length tliere 
|.n.«i*rv««l. 4liM|.l«\iiig * Hiirliiee, hut at the base tliere are ten. New- 
«n- eiithl ‘‘Jj J '\I j i„ l,i’„ (igure. represents the Z. as hav- 
::;A.:in::^rr;"t:u,.t'..g t.,.: uni..., t.. la..,. ,„id„ie„f ae u,g,i„ h„t 
.h...h;~.ri|.li..i.. I cannot make a eertan, nlent.hcatma. It 
!• 'Ml I’lale XIX. Hg- 
• Jriiiii. ••rrYI'I'OH AHIH (r'ois?. 
XX. ••■'IP'- 
I'.lahli-lMil ui. the ai.teri.ir part uf a fiah. inchi.ling the head, scapular arch. 
Hr., fnan lue oml -lalea ..f < h.li'sliurg. Illinois. The details of the structure are not 
Mi.|| pnwrvi.il. lull iiiniiy an- visible. 
nrtilntfe U <*oven-<i hy a closi- fi'SKellation of minute o.s.sifieations. The 
iin- n-iiiarhnhle for the iilU-iiee of tlie expanded basal portion or root wliich 
rhariK lehiu- the nlli.sl Ki-neni OmiiHiun, I .attibeiodus, etc. 'I’he ha.se of the crown 
M shfihlly ex|iniidisl, hut the ns.l pn»|M'r is wanting or rudiinental. The latnal 
.leiiiirh- an- nunimlly wiiuling, although in tlie anterior part of the lower jaw a 
l•ll•ih i» pn*i«*T\«s| with a denticle attached hy a slender basal connection. I refer 
tin- •iHS'ies pntvisioiiidly to tli<* genus .V/v/>/e^rt.v/.v wliieli I ])ropos<*d' for a probable 
I ‘liidiMloiil Mithoiil ex|Miii<l<.d risit or dentich'. altliougli it i.s ipiite possible that 
wlieti •keletaiii,- iif the .S* ttfu/rata and .S*. knightiana are hetU*r known, they 
iiiRV U* roiiiul lit Is’loiig to dinereiit genera. It is |M)Hsihle that the genus termed 
.lA-wtar/ifi/iR/M < hy t’lay|sde» will turn out to Im* identical with .SViyi/it/iir.w, although 
the Itan- ol the tisith is ill the former a little la*tter developed. 
t MO eleiiieiitK U'hiiid the sktill apiMuir to la* the scapular. They are subtri- 
aiiKular. M ith the a|a-\ sii|M-rior: the aiiti'rior lairder projecting forward as it ex- 
I mU doM II Miinl and the |Mts|erior Isinler laMiig nearly vertical. A trace of the 
Imm. of the |MaM.tral tin is pn-m-iit. hut is in |ator preservation. 
( bar. .syvri’//.— I he s|ie«’iiiien diH's not riiriiisli clear characters in some it'siHH'ts. 
-the hen.l rnidnsl nnd distorted, and the dorsal region of the laaly is very iin- 
1-rfe. t Nevertheless, the rorin of the lower jaw and the charm ters 'of the teeth 
”!*' " ' ^ ***’ ^••***•r an* lying in confiisi'd ndations along the palato- 
p erygmd ai.d iiiamlihi.Ur l-nlers. hut at one place the bases of several are 
h.M« t>f> Ii* !' jaw. riiey are of dilTenmt sizes and forms, as fol- 
whirh «%n- nl * I **'"^**""’' jaws the tii'th Inive long and slender crowns 
^ '-I* 'lianmaT. On.lm 
Nil.) ciirv hT * I** ''7”'*’ '**’* '"*****' .*lmrtcr ami iimiv rolmal. Imt arc 
-■llmrr...... ' <i7 t’lV', ml "“irk'-rl 
■ tiNn 111 iIh- 1111.I1II.. In,, „„ I I I mrta ol Hic jaws, the Uclli am .Imrtcr 
ro. . .. w I ■■'■gi..... A aiagic Ka.tl, 
