Tectospondyli. 



87 



Fig. 114. 



Fig. 115. 



Fig. \li.—Sqv.atina alifwa, Mlinst. sp. (after Kraas), Lithographic Stone (Upper Oolite), 



Bavaria. 



Fig. 115. — Squalina sjJeciosa, Meyer ; Lithographic Stone (Upper Oolite), Bavaria. 



o, mandibular cartilage ; b. pectoral arch ; r, pectoral fin ; d, pelvic arch ; f, pelvic fin. 



Fio. 116.— Jaws of Male (A) and of female (B) Thornback Skate, Raja clavata, showing the 

 remarkable variation in the dentition which they exhibit. 



