Arthur Smith Woodward — British Fossil Crocodilia. 499 



Britisli Fossil Eeptiles," i Sir Eichard Owen has reprinted his 

 previous (1841) description of T. Chapmani, and also added particulars 

 of T. hrevior, without attempting to incorporate the results of recent 

 Continental research.^ 



According to MM. Deslongchamps,^ whose views on the subject 

 appear to be now generally adopted, none of these forms are refer- 

 able to Teleosaurus proper, and ought rather to be placed in the 

 genera Mijstriosaurus of Kanp and Pelagosauriis of Bronn, — the 

 broad-faced types, with much depressed cranium and upwardly 

 directed orbits, belonging to the former, and those with long slender 

 snouts and more laterally placed orbits, widely separated, to the 

 latter. The present Professor at Caen, M. Eugene Deslongchamps, 

 regards the Whitby Museum specimen described by Owen (figured 

 by Young and Bird,^ and also in Buckland's fig. 1, pi. 25), as the 

 type of Mystriosanrns Chapmani, Konig sp., and the instructive 

 original of plate 15 (Crocodilia) in Owen's "British Fossil Eeptiles,"^ 

 as a typical example of Pelagosaurus Brongniarti, Kaup sp.® With 

 the latter, also, he would associate the specimens shown in figs. 2 

 and 3 of Buckland's plate 25 ; "^ and, under the same rearrangement, 

 Teleosaurus hrevior would be relegated to Mystriosaiirus. 



Both these genera (or sub-genera) are represented by numerous 

 specimens in the Continental Museums, chiefly from the Upper Lias 

 of Boll, in Wiirtemberg. and of Curcy, in Normandy, and the 

 distinctive features of Pelagosaurus were very definitely elucidated 

 by the elder Deslongchamps : ^ it is more difficult, however, to 

 comprehend the precise particulars in which Mystriosanrus departs 

 from the generic type of Steneosaurus,^ and though Winkler, not 



1 Op. cit., vol. iv. pp. 130-139. 



^ Unfortunately, in this extensive work, there are no particulars as to the date at 

 which each successive part appeared ; but as references on previous pages of the same 

 volume (eg., on p. 66) relate to papers published so recently as 1880, the following 

 description of the Teleosaurs cannot have been printed before that or a later year. 



^ E. E. Deslongchamps, "Notes Paleontologiques " (1863-1869), and '• Le Jura 

 Normand : Etudes Paleontologiques des Divers Niveaux Jurassiques de la Nor- 

 mandie," Monographie iv. (1877-8). 



* Young and Bird, " Geological Survey of the Yorkshire Coast," 2nd edit., 1828, 

 pi. xvi. fig. 1. 



^ It may be noticed that this (British Museum) specimen is not described in Sir 

 Richard Owen's letterpress, although the plate is cited at the commencement of the 

 Section (vol. iv. p. 130j. Measurements, however, are given by M. Eugene Deslong- 

 champs, " Le Jura Normand," Mon. iv. p. 11. 



^ To this species, also, M. Deslongchamps assigns Chapman and "Wooller's original 

 specimen, and the restored figure given in (Jwen's '' Mon. Foss. Kept. London Clay," 

 pt. ii. (Mon. Pal. Soc, 1850),pirxi. figs. 2, 2«. 



■^ Vide Deslongchamps, " Le Jura Normand," Mon. iv. pp. S-IZ, passim. 



^ See works of Eugene Eudes Deslongchamps already cited : the descriptions of 

 Pelaf/osaurus are largely based upon the studies of J. A. Eudes Deslongchamps 

 " Memoires sur les Teleosauriens de I'Kpoque Jurassique du Departement du 

 Calvados, Mem. i," Mem. Soc. Linn. Normandie, vol. xiii. \_Pelagosaurtis typus is 

 here described as Teleosaurus timpomtis, but tlie mistake was afterwards rectified] 



^ In 1877, Eugene Deslongchamps (" Le Jura Normand," Mon. iv. p. 8, fiote) 

 announced a forthcoming paper on this subject, to be published in the Bull. Soc. Zool. 

 France : the writer, however, has not been able to meet with it either in that journal, 

 or in any of the Caen publications. 



