658 REPORT— 1894. 



figured under that headinp: are mainly referable to tbo3e of Labyrinthodonts, and that 

 teeth of ' Saurichthys ' of various authors can be definitely assigned — 



1. To Labyrinthodontia, sp. 



2. To Plesiosaurus rosfrat.us. 



3. To Hybodus, sp. (sympbysial teeth). 



4. To Gyrolepis, sp., and perhaps Colobodus, sp. 



' RrsosTEtrs.' * 



This genus was instituted by Owen from the examination of a single anterior 

 dorsal vertebra ' half imbedded in its pyritic matrix from the bone-bed of Aust 

 Passage, near Bristol,' and of other portions from Westbury-on-Severn ; the type 

 specimen not being in existence has apparently prevented any reference to similar 

 specimens since that time, and it may be as well to put on record that some few 

 nearly perfect examples of dorsal and other vertebrae, and many portions of others, 

 of the character of those attributed to Rysosteus Oweni," have been procured by the 

 writer from Aust Cliff and Westbury-on-8evern, Gloucestershire. 



Whether Rysosteus be truly a reptile is not mooted at present, until the whole 

 of the material in the writer's possession has been exhaustively examined ; but, from 

 the striated character of the neural and haemal spines, and the characters of the 

 centra of the vertebrie, &c., the resemblance to some amphibian such as Urocor- 

 dylus Wandesfordii^ is by no means incomplete. 



DlNOSAVEIA. 



Phalangeals similar to those from Aust Cliff in the British Museum, and attri- 

 buted to Zanclodon (?), are in the writer's possession, but a fairly large vertebra, 

 2^ in. in length by 2 in. in height, exclusive of the neural spine, which is missing, may 

 pertain to Zanclodon, or is perhaps more closely allied to Massospo7idylus : m either 

 case this vertebra will be a new record for Britain. Limb-bones, both large and 

 small, are also in his possession, and are provisionally assigned to this order. 



6. On some Forms of Saurian Footprints from the Cheshire Trias} 

 By Osmund W. Jeffs. 



The picturesque quarries in the Lower Keuper (building stones' series), situated 

 at Storeton Hill in Cheshire, have long been familiar to geologists as being the 

 scene of the earliest discovery in England of the famous Cheirotherium footprints by 

 Messrs. Cunningham and Yates in 1839. Besides the impressions of Cheirotherium 

 and Rhyjicosaurus (figured by Mr. G. H. Morton, F.G.S., in his ' Geology of the 

 Country around Liverpool ') these quarries yield impressions made by other species 

 of animals, which have been obtained by the author during several years' study 

 of the district. Some of these forms (hitherto undescribed) were exhibited. They 

 include — 



(a) Genus non det. — Slab of Keuper sandstone showing hind and fore feet of 

 a smaller animal than C. Stortonense, with narrower toes, which curve inwards 

 and are not separated, nor do they radiate as in true species of Cheirotherium. 



(6) Ge7iu8 non det. — Tracks of a small animal f inch in length, with a stubby 

 foot and having very distinct claws on the digits. 



(c) Genus non det. — A still more minute form, ^ inch in length, showing four 

 digits tapering to a point, with no vestige of claws. 



{d) An oval impression, with concave terminated digits and a hinder pro- 

 jecting ' spur.' Toes webbed. This may be the impression of a chelonian, 



' R. Owen, Rep. Brit. Assoc., 1841 (1842), pp. 159, IGO ; J. Morris, Cat. Brit. Foss., 

 1854, p. 353. 



" A. S. Woodward and C. D. Sherborn, Cat. Brit. Foss. Vert., 1890, p. 282. 

 ' T. H. Huxley and E. Perceval AVright, Tram. Roy. Irish Acad., 1867, pp. 

 359-362, pi. XX. 



The paper will be published in extenso in the Geological Magazine. 



