78 1CHTHY0PTERTGIA. 



This species is confined to the Upper Lias, and attains dimensions 

 nearly equal to 7. loncMoclon. 



Hub. Europe (England, France, and [?] Germany). 



R. 1167. Cast of the cranium, wanting the extremity of the rostrum, 

 of a very large individual. The original, which is the type, 

 was obtained from the Upper Lias of Whitby, Yorkshire, 

 and is preserved in the Woodwardian Museum at Cambridge. 

 It is figured by Seeley in the 'Quart. Journ. Geol. Soc' 

 vol. xxxvi. pi. xxv. The crowns of the teeth are wanting, 

 but the specimen has been unaffected by crush, although 

 some displacements have taken place of the basioccipital 

 and in the palatal region. Superiorly the quadratojugal 

 runs up between and overlaps the postorbital and supra- 

 temporal (supraquadrate of Seeley) in a long point, so as 

 to reach above the level of the superior extremity of the 

 quadrate, while posteriorly and inferiorly the supratem- 

 poral overlaps the quadratojugal. The contour and ar- 

 rangements of these bones are, indeed, very similar to 

 those in Theodori's drawing of the Bavarian skull men- 

 tioned above (p. 76). On the palate the bones (t) identi- 

 fied in Seeley's figure with the transverse are really the 

 palatines, and those termed palatines (pn) the vomers, 

 while the apertures marked Pt. V., and termed palatine 

 vacuities, are the posterior nares. Although it is stated 

 that the base of the skull is widely different from that of 

 the next specimen, the two are really almost identical. 



Made in the Museum, 1888. 



33157. The nearly entire cranium of a half-grown individual, want- 

 (Fig.) ing the anterior portion of the rostrum, with the two 

 articular bones; fiom the Upper Lias of Curcy, near 

 Caen, Normandy. The type of I. longifrons. Figured by 

 Owen in his ' Liassic Eeptilia ' (Mon. Pal. Soc), pt. iii. 

 pis. xxxiii.-xxxvi., a reduced view of the frontal aspect 

 being shown in the accompanying woodcut. In all essen- 

 tial characters this specimen agrees with the preceding ; 

 and it is indistinguishable from the skull represented in 

 fig. 28. The lateral surfaces of the orbital region have, 

 however, been somewhat compressed, which makes the 

 plane of the orbit less oblique j and the nasal ridges are 

 rather Jess prominent. The quadratojugal only extends 

 a short distance between the postorbital and supratemporal, 



