STENEOSAUBUS LEEDSI. 119 



that in the vertebrae and to some extent in the bones of the limb-girdles and limbs 

 the slenderness characteristic of the head is again shown. The description of the 

 skeleton, given above, is in great part founded on a nearly complete skeleton of this 

 species (R. 3806), and several figures of it have been given. 



The dermal armour (PL V. figs. 6-10 ; text-figs. 48-49), as usual, consists of two 

 rows of keeled dorsal scutes in contact in the middle line ; the keel is prolonged 

 forwards into a spine, which is overlapped by the scute in front. There are also 

 numbers of keelless scutes which probably belong to the ventral surface, but the 

 arrangement of these is not known. In the dorsal scutes the sculpture consists of deep 

 and numerous pits. 



E. 3320. Near])- complete skull and mandible. Typo specimen described and figured in Ann. 

 Mag. Fat. Hist. [8] vol. iii. (1909) p. 300, pi. viii. fig. 1, also PI. V. figs. 1-3. The 

 skull wants one or two centimetres of the tip of the snout, and the cranial portion is, as 

 usual, much crushed from above downwards. There are 45— 4G teeth on either side of 

 the upper jaw and 43-44 in the lower. 



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



Skull : total length (occipital condyle to tip of snout) . . . 81'0 



length in front of orbit 59'0 



,, between outer angles of quadrates 13-0 



,, of temporal fossae on inner side 12 - 



width of temporal fossa? 7 - 3 



,, frontals between the orbits 3'5 



„ skull opposite the anterior rim of the orbit . 10-5 



,, snout at anterior end of nasals . . ... 4*3 



width behind premaxillary expansion 2-9 



width of premaxillary expansion 3 - 8 



Mandible: total length 89-0 



length of symphysial region 52-0 



width at hinder end of symphysis 7'3 



„ narrowest point behind anterior expansion 2 - 2 



R. 3806. Nearly complete skeleton, including skull, mandible, atlas, axis (text-fig. 34, A, B), 

 and other cervicals (text-fig. 35, A, B), dorsals (text-fig. 36), sacrals and caudals 

 (text-fig. 38, D, E, F), numerous cervical and dorsal ribs, chevrons (text-fig. 40). scapula; 

 and coracoids (text-fig. 41, B), humeri, radii, ulna?, ilia, ischia, and pubes (text-figs. 43, 44), 

 femora (text-fig. 45) ; tibise and fibula? (text-fig. 46) and bones of the hind foot 

 (text-fig. 47) ; numerous scutes (PI. V. figs. 6-10 ; text-figs. 48, 49) and some portions 

 of ventral ribs. This specimen is probably the most nearly complete skeleton of a 

 Mesozoic Crocodile known. 



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



Skull: total length So-3 



length in front of orbit . . ., (51 -3 



width between outer angles of quadrates 204 



length of temporal fossa? (inner side) 14-2 



