METEIOEHYNCHUS DUEOBEIVENSE. 199 



E. 3700 (Leeds Coll. 165). Skull (PL XII. ; text-figs. 58, 59) wanting the anterior portion of the 

 premaxilla. Much of the palate (PI. XII. fig. 2) is preserved, and has "been described 

 and figured by E. T. Leeds in Quart. Journ. Greol. Soc. vol. lxiv. (1908), pp. 351-356. 

 figs. 1 & 2 ; the skull as a whole is figured on pis. xl. & xli. fig. 2 of the same paper. 

 The dimensions (in centimetres) of this specimen are : — 



Length in mid-dorsal line (approx.) 6L5 



,, from occipital condyle to tip of snout . . (approx.) 68"0 



Greatest length of nasals 25 - 



Distance between nasals and preniaxilloe 0"0 



Length of the frontal anterior to temporal fossa ll'O 



Least width between orbits 10 - 4 



Width between outer angles of prefrontals 21*3 



E. 3599 (Leeds Coll. 164). A much-crashed skull wanting a great part of the right premaxilla and 

 the right jugal arch ; a large part of the palate is preserved. Figured hy E. T. Leeds 

 in Quart. Journ. Geol. Soc. vol. lxiv. (1908) pis. xl. & xli. fig. 1. 

 The dimensions (in centimetres) of this specimen are : — 



Length of skull in mid-dorsal line 63 - 5 



„ from occipital condyle to tip of snout 70 - 



Greatest length of nasals 24 - 7 



Distance between nasals and premaxilla? 1*6 



Length of the frontal anterior to temporal fossa? 12'8 



Least width between orbits 10"5 



Width between outer angles of prefrontals 22'4 



„ ,, „ quadrates 24 - 7 



E. 3939. Imperfect skull and mandible, with eight distorted vertebrse, of a large individual, 

 probably of this species. Some of the teeth are well preserved in this specimen. 



Owing to the imperfection of the specimen very few measurements can be given. 

 These (in centimetres) are : — 



Length of the frontal anterior to temporal fossae 14 - 5 



Least width between orbits 12-6 



Width between the outer angles of the prefrontals .... 23'3 



Metriorhynchus durobrivense, Lydekker, sp. 



[PL XIII. ; text-fig. 73, G.] 



1890. Suchodus durobrivensis, Lydekker, Quart. Journ. Geol. Soc. vol. xlvi. p. 284. 



Type Specimen. — Symphysial portion of a mandible described and figured by 

 Lydekker in Quart. Journ. Geol. Soc. vol. xlvi. (1890) p. 284, fig. 2. (R. 1994.) 



This species is a broad-skulled, short-snouted form (text-fig. 73, G), in which the 

 nasals do not quite reach the premaxilla?; a line drawn through the posterior end of the 



