NO. 1666. 



OSTEOLOGY OF CAMPT0SAURU8—GILM0RE. 



205 



The occipital region, parietals, and frontals have been largely based 

 upon the posterior portion of a skull of C. dispar, No. 5473, U.S.N.M. 



Fiu. 2. — Skull of Casiptosaurus. Co.mposite re.storatiox ; about J nat. size. Seen 



FROM THE LEFT SIDE ; UllfJ, ANGULAR ; 1)0, BASIOCCIPITAL ; hs, BASIPHENQID ; d, DEXTARY ; 



ejTo, EXorciPiTAL ; f, frontal ; if, i>-frate.mporal fossa ; ju, juoal ; I, lachryaial ; 

 VI, maxillary; luf, mental foramen; na, nasal; no, nasal orifice; o, orbit; oc, 

 occipital condyle ; pd, pkedentaky ; pf, postfrontal ; pmx, premaxillary ; prf, 

 prefrontal ; qj, quadratojugal ; qu, quadrate ; s, supraorbital ; sf, external mandi- 

 bular foramen ; sof, supraorbital fossa ; sp, splenial ; sq, squamosal ; sar, suran- 

 gular ; VIII, inter'nal auditory meatus ; IX, ..Y, foramen lacerum posterius ; XII, 

 hypoglossal foramen, and foramen for exit of vein. 



(see Plates 10 and 11). The anterior half as well as the infero- 

 posterior part are after No. 1887, Yale Museum (see Plates 7 and 8). 



Fig. .'?. — Skull of Camptosaurus. Composite restoration ; about I nat. size. Seen 

 Fuo.M THE top; cxo, exoccipital ; f, fkontal ; fm, foramen magnum; if, infkatem- 



I'ORAL i ">SSA ; ju, JUGAL ; I, LACHRYMAL ; na, NASAL ; OC, OCCIPITAL CONDYLE ; p, PARIETAL ; 

 pf, POSTFRONTAL ; pmw, PREMAXILLARY ; POC, PARAOCCIPITAL PROCESS OR OPISTHOTIC ; 

 prf, PREFRONTAL ; qU, QUADRATE ; S, SUPRAORBITAL ; SO, SUPRAOCCIPITAL ; SOf, SUPRA- 

 ORBITAL FOSSA ; sq, SQUAMOSAL ; Stf, SUPRATEMPORAL FOSSA. 



The lower jaw and maxillary are partly after No. 1887 and partly 

 after No. 1886 (see figs. 7 and 8) , also in the Yale Museum. No. 1880, 



