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LEPTOLEPIDiE. 517 
P. 6736. Preoperculum ; Oxford Clay. Jesson Coll. 
P. 4696. Three small fishes, the largest 0*08 in length ; Lower 
Kimmeridgian (Lithographic Stone), Cirin, Ain, Prance. 
The best specimen shows impressions of about 45 ver¬ 
tebral centra, and the head with opercular apparatus is 
contained four times in the total length of the fisn. 
Purchased , 1884. 
The following species are incompletely defined or unrecognizable, 
and the third is clearly not represented in the Collection : — 
Leptolepis grandis , T. C. Winkler, Archiv. Mus. Teyler, vol. iii. 
(1871), p. 183, pi. v. figs. 13, 14.—Lower Kimmeridgian 
(Lithographic Stone); Bavaria. [Scales : Teyler Museum, 
Haarlem.] 
Leptolepis latus , L. Agassiz, Poiss. Poss. vol. ii. pt. ii. (1844), 
pp. 134, 295 (name only).—Ibid. [Unknown.] 
Leptolepis matronensis , P. J. Pictet, Mem. Soc. Linn. Normandie, 
vol. xvi. (1872), no. i. p. 13, pi. ii. fig. 1.—Portlandian ; 
Beaudrecourt, Haute Marne. [Boyer Collection.] 
Leptolepis tenellus , L. Agassiz, tom. cit. (1833-44), pt. i. p. 13 ; 
pt. ii. p. 134.—Lias; Baden. [Imperfect fish.] 
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Undetermined immature examples of Leptolepis from the Bavarian ^ £. s * - ^ p 
Lithographic Stone seem to have been named Tharsis parvus and 
Tkarsis microcephalus by C. Gr. Giebel, Pauna d. Vorw., Pische, 
(1848), p. 147. 
The undefined generic name Oxygonius (L. Agassiz, in Brodie’s 
Possil Insects, 1845, p. 16) is given to some indeterminable fry 
from the Purbeck Beds of the Yale of Wardour which cannot be 
satisfactorily distinguished from Leptolepis. The typical and only 
known species is 0. tenuis (L. Agassiz, op. cit. p. 16, pi. i. fig. 4), 
and it is represented in the Collection by the following speci¬ 
mens :— 
P. 923, P. 3687. Slab with several fishes and two detached speci¬ 
mens ; Lower Purbeck, Yale of Wardour. 
Egerton Sf Enniskillen Colls. 
P. 444, P. 4730. Two fine specimens; Yale of Wardour. 
Presented by Rev. P. B . Brodie , 1885. 
The type specimen of Oxygonius tenuis is in the collection of 
Eev. P. B. Brodie, Kowington, Warwick. 
