Geological Society, 103 



3. 'Some K'.'iitih.iii li'muiH from tho Trias of J.'jssic.noulli.' 



IJy 1). M. S. Wiit-son, B.Sc. 



The fore limb of Ornithotuchua u'oodwardi is shown in aflpccimon 

 in the Mtinchostor Museum. It i« small, only about oiio-half the 

 size of tho hinil h'R. Tho scapula is much expanded at both cndH, 

 and is indistinguishably fused with tho coracoid. The latter bone 

 is pierced by a lar>;e foramen. The humerus is a slender bone, 

 somewhat twisted, but not much expamled at tho ends; it has a 

 distinct eetepicondylar groove. The ulna is very bmad at tin* 

 proximal end, but narrows distally ; its ])roxiraal j)ortion forms a 

 thin plate of bone. The radius crosses the ulna, its proximal end 

 lyiii{; entirely in front of it, while the distal ends of tlie two bones 

 lie side by side. The carpus cannot be made out. Only meta- 

 carpals 1, 2, and li are functional ; but a possible representative 

 of 4 lies closely pressed to the back of the other three. IJoth 

 phalanges of dij^it 1 are preserved, the last being a strong claw. 



OntilfiosHcfiiis is restored as an animal walking on all fours, with 

 the head carried rather low. Tho proportions are identical with 

 those of ^^losnnrus. 



A description is given of the skeleton of a very small reptile, 

 interesting as recalling ^Etosaurus in its armour, and because it 

 shows the whole of the animal except the tail. 



4. 'Some Reptilian Tracks from the Trias of Runcorn (Cheshire).' 



By D. M. S. Watson, B.Sc. 



Very little information exists as to the tracks of the smaller 

 reptilia of the Trias, although several types of footprints have been 

 described from isolated examples. Four types of tracks which 

 occur on the slab of sandstone from Weston Point, described in 

 1840 by Dr. lUack, are discus.sed in this paper. They belong 

 to forms generally included in the Rhynchosauroid tyj)C8 and to 

 the footprint I, lieasloy. 



Both pes and manus arc impressed in three of the cases, the 

 other being so small that it is doubtful whether the manus would 

 have made a recogni/.ablc impression if it did touch the ground. 



Footprint A 2, liea.sley, has a manus very similar to the pes, but 

 showing some traces of tho palm. 



Footprint A 8, spec, nov., has five toes in the pes connected by a 

 ■web. The manus is also five-toed, but corresponds to some extent 

 to I, UeaBley. There is a w-ell-markcd tail-streak in tlio track. 



E, lieasley, which is very similar to I, really has live digits, the 

 fifth being directed backwards and only just touching the ground. 



A very small footprint is described as A 9. 



It is suggested that some of these priuts may quite well belong 

 to such Thecodonts as Ornithosuchus. 



