' WILLISTON: RESTORATION OF ORNITHOSTOMA (PTERANODON). — 41 
Ses. The process is very broad, elongated and stout, and evidently 
represents the co-ossified rib. There is a round foramen between 
the two roots. It is probable that each of the vertebra has a simi- j 
lar co-ossified rib on each side, but only that of the anterior one is 1 | 
preserved, 
In another specimen, the co-ossified neural spines, or, as I believe 
them to be, the ossified supraspinous ligaments or cartilages are 
united to form a stout vertical plate of bone, which bears on each 
side an oval articular facet for union with the end of the scapula. | 
Measurements of cervical vertebrae, Ornithostoma sp. (No. 2211). 
IPenoth OnCenthiinn third Genrvicdle ei Cand .48 mm. 
Wen SthviOd, Geninuine COUT GELVICa lacy (i ce yiaeinihn clad 
AWHTCUDIT OTe DOU TS eeu aya can aed Mee RNG) SUR yn NAC apnea MOK) 
Isl eS teal detonnM oy NilbcGnisanbhada Uke) Marka WAaINY iraleesic iGakunmary shui WY. \q) 
Distance between pre-exapaophysesiy ws 16 | 
DIAnISter Or WrexeRaDOPNVSES ici eT ehy whiratis ewan 
TEMS CEM Oe me UT aU CUT aL edn et tak y cr hi wmecii CMM Wren lae NZ 
PEW UMMOLGEM Eh IN) Mittin CEnviGe ley wrt i lGimwntdr cayee inn wn nee | 
Witt) Ot PORTER EDODIMGGS tah bai midi mui u tives 
Weng OL CenteUml, “SIRT CORVIOH i iwi ais n sink Bee 
eno: Of contruiny Seventh CebVicdl Ne ool sia aO ‘ 
AVAL SCOT [EL sian cuacapae eh aun AAU GSA, Gr TSG leah tna anecneN Aye a i 
ene th vor Cemenunniumrets COrSeli xii) comets aly ccaisicnt | 
VV TCUU HM GS ORM Munn ayant cen MRIS CEPOL Me nM OMe Ua That ANY rdG AMIN eC) te 
Distance, between anterior zygapophyses.......\...74 
TAS Verse CIAIVEreriOn NEUTAliOamaliy nw iwi meienwie cA) 
NWtcltnvotmeuse | 6 pare! A tbase yard wean secvamue sath onda 
1 Height of vertebra, approximated... vice ee hl } 
SMETH OL CENLMMM TH SSCOMCU COTS y Wit mina ani wiuesi Gite 
VV ARE OE WIRDEUII LT CUwuley ates NE nih tad ae eu vthta tye STGP He ROCA EUAN at a a 
IME Male] Kohala) ual al =f ih otc hMeot Tene WO ae ap MARR On a RAN Hay a remo) 
IPSTELHNO CEMUnU NIN tEImC MCORSENi sc uote W vy hei Scanian ano | 
Width, of cup, including lateral:facets.)/00.. 60.45.28 | 
PCWE UO COMinuiy TOUTE CLOUSAL clenunli wav Lhe Nay ets 
Length of transverse processes preserved, from pre- 
ZV QE OOMMIYSES rate nevine lenin Can Aa ean owel Wt neta t 
ASAVAGG Naif a ohn thatch ROR TENE a HOGS ONE GRIE\eT A (HU LCnUN MAMPI ALnaisnaag 
Ornithostoma ingens (No. 1951). 
ISSN UM Ot CEMiTUIm titi COLVICAlia Fi WW cid ya ROOMmamy | 
mE NIVAL GU BIA CUR SLI cul athedhaiee StRin hate at ghibe ees Unie gied Ng thine eh SVE RRR ON eRe 
Peer COU ale Mt MET NCLCLG, Vala Wl u\so meu beleve yea fdltahdhss Wau amvennend @ 
% 
