ORDER IV 



SAUEOPTEEYGIA 



173 



paired lateral series of abdominal ribs present. Proximal tarsals consisting of 

 two large elements, the distal five each supporting a digit ; phalangeal formula, 

 2, 3, 4, 4, 3. Hind limb longer and stouter than the anterior, but otherwise 

 very similar ; phalangeal formula 2, 3, 4, 5, 4. Pakte with suborbital and 

 infratemporal vacuities, but no interpterygoidal. Middle Trias ; Lake Como, 

 Italy. 



Pachypleura, Cornalia (Neusticosaurus, Seeley). Similar to the preceding 

 but smaller (25-30 cm. long), with much shorter neck; about sixteen cervicals 



Fig. 27; 



Nothosauriis mirabilis, Münst. Muschelkalk ; Bayreuth, Gennany. Skull, slightly 

 restored, 1/4. A, Dorsal aspect (after Quenstedt). B, Lateral aspect. C, Palatal aspect 

 (after v. Meyer). A, Orbit; ang, Angular ; art, Surangular; bo, Basioccipital condyle ; 

 ch, Internal nares ; d, Dentary ; fr, Frontal; G, Infratemporal vacuity ; j, Jugal; k, 

 Articular ; md, Mandible ; onx, Maxilla ; N, External narial openiug ; na, Nasal ; pa. 

 Parietal ; pl, Palatine ; pmx, Preniaxilla ; prf, Prefrontal ; pt, Pterygoid, bounded in 

 iront by voiner (suture not shown) ; ptf, Postfrontal ; qri, Quadrate ; qvj, Quadrato-jugal 

 fused with squamosal and suprateniporal ; S, Supratemporal vacuity. 



Fig. 274. 



Tooth, 1/1. of 

 species shown in 

 Fig. 273. 



Fio, 275. 



Cervical vertebra, 

 1/1, of species 

 shown in Fig. 273. 

 A, B, Dorsal and 

 lateral aspects. 



and forty caudals. Upper Trias (Raibl Beds) ; Besano, Lombardy, also Letten- 

 kohle of Hoheneck, near Ludwigsburg. 



Dadylosaurus^GüTich; Jnarosaurus, Bannes; CymatosauruSy J)a.mGS. Muschel- 

 kalk ; Silesia and Thuringia. 



Nothosaurus, Münst. (Figs. 273-277). Distinguished from Lariosaurus by 

 its larger size, closure of suborbital vacuity in the palate, and presence of short 

 and stout transverse processes on neural arches of dorsal vertebrae. 



The skull is elongated and somewhat contracted anteriorly, attaining a lengtli of 

 35 cm. in the typical species. The supratemporal vacuities are very large, th£ uu- 

 paired parietal being reduced to a narrow bar, pierced posteriorly by a parietal 



