414 
CftOSSOPTERYGrll. 
Libya polyp terus, Miinster. 
1842. Libys polypterus, G. yon Miinster, Neues Jahrb. p. 45. 
1866. Ccelaccmthus ( TJndina) kohleri, T. H. Huxley (errore), Figs. & 
Descrips. Brit. Organic Bemains (Mem. Geol. Surv.), dec. xii. 
p. 42. 
1888. Libys polypterus, 0. M. Beis, Palaeontographica, yol. xxxv. 
pp. 37, 50, pi. iii. figs. 1-11. 
Type. Fragment of head; Palaeontological Museum, Munich. 
The type species, imperfectly known. Jugular plates long and 
narrow, the maximum breadth being contained about fiye 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. Sf Loc. Lower Ivimmeridgian (Lithographic Stone) : Bavaria. 
P. 3337. Specimen described by Huxley, loc. cit ., under the name 
of Ccelaccmthus (TJndina) 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 TJndina 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 0-06 in length and 0-11 in maximum 
breadth. Enniskillen Coll. 
Libys superbnsj Zittel. 
1887. Libys superbus, K. A. von Zittel, Handb. Palaeont. vol. iii. p. 175, 
woodc. fig. 179. 
1888. Libys superbus, 0. M. Beis, Palaeontographica, 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. 
Hot represented in the Collection. 
