284 
ACTIXOPTEPvYGir. 
forms, however, bear more resemblance to the pharyngeal teeth of 
certain bony fishes, as maintained by W. Dames (Zeitschr. dentsch. 
geol- Ges. vol. xxxv. 1883, p. 658). 
Such teeth are exhibited in the front of the mouth of a specimen 
of Xenopholis carinatus from Mount Lebanon, in the Court Museum, 
Vienna; and the following specimens are preserved in the Collec¬ 
tion :— 
P. 7460. A comparatively large tooth, slightly constricted and 
crimped at the ba.se of the crown; Chalk, Lewes. 
Presented by Rev. T. Wiltshire. 
49956. Smaller tooth, described and figured in Proc. Geol. Assoc. 
vol. x. (1888), p. 330, pi. i. fig. 10; Lower Chalk, Lewes. 
Capron Coll. 
P. 335. Still smaller dental crown; Chalk, Hart Hill, Charing, 
Kent. Harris Coll. 
The following Cretaceous forms of these prehensile teeth have 
also been named :— 
Ankistrodus splendens , L. G. de Koninck, Pull. Acad. Hoy. Sci. 
Belg. [2] vol. xxix. (1870), p. 78, figs. 1-3.—Upper 
Senonian; Meudon, near Paris. [Geological Museum, 
University of Louvain.] 
Ancistrodon lihycus , W. Dames, Zeitschr. deutsch. geol. Ges. 
vol. xxxv. (1883), p. 663, pi. xix. figs. 6-8.—Senonian ; 
Gassr-Dachel, Libyan Desert. [Palaeontological Museum, 
Munich.] 
Ancistrodon mosensis, W. Dames, ibid. p. 662, pi. xix. figs. 4, 5. 
—Senonian ; Aix-la-Chapelle and Maastricht. 
Ancistrodon texanus , W. Dames, ibid. p. 664. Ancistrodon sp. 
F. Roemer, Kreidebild. Texas (1852), p. 10, pi. i. fig. 10.— 
Senonian; Texas. [Geological Museum, University of 
Breslau.] /V <^/ /A&y 
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