R. Lydehker — Ilordtoell and other Crocodilians. 307 



"barbed-arrow" appearance. Posteriorly, the denticles are almost 

 destroyed in tbe figured specimen, but another fossil shows that 

 they are largest in the middle, decreasing towards either end, and 

 the points are all inclined downwards. 



The only pectoral spines that can be associated with this species 

 are, unfortunately, too imperfect for description. They seem to 

 have been considerably arched, and have an ornamentation similar 

 to that of the dorsals. 



Formation and Locality. — Upper Eocene : Barton Cliflf and High 

 Cliff, Hampshire. 



Such, unfortunately, is the most complete evidence of early 

 Tertiary Siluroids that appears to have been hitherto discovered 

 in the European area. Among Continental works, I have only 

 succeeded in meeting with the single description of a dorsal fin-ray 

 ("second") and a fragment of a pectoral spine, from the Eocene (?) 

 Beds of Austria,' in addition to a brief notice of the presence of the 

 family in the Belgian Eocenes.^ And from rocks of still earlier 

 date, only one fish seems to have yet been referred to the same 

 systematic position — the Telepholis acrocephalus of von der Marck, 

 from the Upper Cretaceous of Westphalia ; ^ and this determination, 

 it must be admitted, is scarcely placed beyond all doubt. 



IV. — Note on the Hordwell and other Crocodilians. 

 By R. Ltdekker, B.A., F.G.S. 



THE two admirable summaries of our knowledge of fossil Croco- 

 dilia recently published by Mr. A. Smith Woodward — the one 

 relating to British forms, in this Magazine,^ and the other, com- 

 prising the whole order, in the "Proceedings of the Geologists' 

 Association " ^ — render it a comparatively easy matter to find out what 

 is known concerning any particular species or genus ; and I may 

 accordingly at once proceed to the proper subject of this paper. 



Hordwell Crocodiles. — In the above memoirs Mr. Woodward^ follows 

 the original suggestion of Sir K. Owen — more fully confirmed by 

 Prof. Huxley — that the Crocodilian remains from the Upper Eocene 

 (Lower Oligocene) of Hordwell described under the names of 

 Alligator Mantoniensis and Crocodilus Hastingsice belong to one and 

 the same species. The author adopts for this species the trivial 

 name Hastingsice (although Hantoniensis has the priority), and 

 retains it in the genus Crocodilus ; remarking, however, that it 

 presents characters which under certain circumstances might entitle 

 it to rank as generically distinct. Sir E. Owen, in his original 

 description of the so-called C. Hastingsim, remarked that the skull 



^ Pimelodus Sadleri, J. J. Seckel, " Beitrage zur Kentniss der fossilen Fische 

 Oesterreicher," i. (1849), p. 15, pi. ii. fig. 3. 



- H. Le Hon, " Preliminaires d'un Memoire sur les Poissons Tertiaires de 

 Belgique," 1871, p. 15. 



3 W. Yon der Marck, "Neue Fische und Krebse aus der Kreide von Westphalen," 

 Palaeontogr., vol. iv. p. 276, pi. iliii. figs. 6, 7 ; also ib. vol. xxxi. p. 248. 



* S'iprd, Vol. II. pp. 496—510 (1885). 



5 Vol. ix. No. 5 (1B86). « Geol. Mag. op. cit. p. 509. 



