﻿414 CKOSSOPTERYGII. 



Libys polyp terus, Miinster. 



1842. Libys poly pterus, G. von Miinster, Neues Jahrb. p. 45. 



I860. Cadaccmthus (Undina) kohleri,T. H. Huxley (errore), Figs. & 



Descrips. Brit. Organic Remains (Mem. Geol. Surv.), dec. xii. 



p. 42. 

 1888. Libys polyptems, O. M. Reis, Palseontographica, vol. xxxv. 



pp. 37, 50, pi. iii. figs. 1-11. 



Type. Fragment of head ; Palasontological Museum, Munich. 



The type species, imperfectly known. Jugular plates long and 

 narrow, the maximum breadth being contained about five and a 

 half times in the total length. Scales [so far as known] ornamented 

 with large, closely arranged, elongated tubercles. 



This provisional diagnosis is given, on the assumption that the 

 specimen mentioned below is correctly determined. 



Form. fyLoc. Lower Kimmeridgian (Lithographic Stone) : Bavaria. 



P. 3337. Specimen described by Huxley, loc. cit., under the name 

 of Coelacanthus (Undina) kohleri ; Kelheim. The head 

 exhibits the excavated parafrontals, regarded as character- 

 istic of the genus Libys; but a few scales in advance of 

 the first dorsal fin are indistinguishable from those of the 

 typical Undina penicillata, and Huxley may be correct 

 in describing the ornamentation of the cranial bones as 

 having "disappeared" accidentally. The narrow jugular 

 plates are well displayed from the inner aspect, each 

 measuring about O06 in length and 0-11 in maximum 

 breadth. EnnisTciXlen Coll. 



Libys superb us, Zittel. 



1887. Libys svperbus, K. A. von Zittel, Handb. Palseont. vol. iii. p. 175, 

 woodc. fig. ] 79. 



1888. Libys svperbus, 0. M. Reis, Palseontographica, vol. xxxv. pp. 41, 

 50, pi. ii. figs. 1-4. 



Type. Nearly complete individual ; Palaeontological Museum, 

 Munich. 



Body short and robust ; head with opercular apparatus occupying 

 less than one quarter of the total length. Jugular plates broad, 

 the maximum breadth being contained about three and a half times 

 in the total length ; ornamented with few fine striae. Scales with 

 a sparse ornament of elongated tubercles. 



Form. Sf Loc. Lower Kimmeridgian (Lithographic Stone) : Ba- 

 varia. 



Xot represented in the Collection. 



