252 



EEPTILIA 



CLASS III 



vertical. Probably four sacrals, and at least thirty caudals present, some of 

 the latter with chevroii bones. Scapula and coracoid fused. First digit of 

 manus represented by a styliform ("pteroid") bone, and first wing phalanx 

 shorter than the antebrachium. Ischium large, distally expanded. The iirst 

 four clawed digits of the pes are normal, and the fifth divaricated ; the latter 

 with an attenuated metatarsal and two phalanges. The skull of D. macronyx, 



Fig. 358. 



Rtiamphorhyrnhus gemmingi, v. Meyer. Lithographie Stone ; Eichstädt, Bavaria. A, Orbit ; D, Antorbital 

 vacuity ; N, External narial opening ; pmx, Premaxilla ; r, Rib ; S, Lateral temporal vacuity ; S', Supratemporal 

 vacuity ; st, Sternum. 



Owen, the only described species, attains a length of 20 cm. Lower Lias ; 

 Dorsetshire. 



Dorygnathus, Oppel. Upper Lias ; Würtemberg and Franconia. Bhampho- 

 cephalus, Seeley. Bathonian ; Stonesfield, England. Imperfectly known genera. 



Campylognathus, Plien. Known by a complete skeleton from the Upper 

 Lias of Holzmaden, Würtemberg. Skull less deep than in Bimorphodon, 

 toothed to the extremity of the jaws ; the anterior tooth above and the first 

 two below large and recurved. Mandibular rami toothed nearly to the 

 extremity, which is deflected downward. Narial opening larger than the 



