TERCIDiE. 
515 
Properca angusta (Agassiz). 
1834. Perea elongata, L. Agassiz, Neues Jahrb. p. 383. 
1836. Perea angrnta, L. Agassiz, Poiss. Foss. vol. iv. p. 79, pi. xi. 
1874. Perea angusta, H. E. Sauvage, Bull. Soc. Hist. Nat. Toulouse, 
vol. viii. p. 183. 
1880. Properca angrnta, II. E. Sauvage, Bull. Soc. Geol. France [3] 
vol. viii. p. 452. 
type. Imperfect fish ; olim Brongniart Collection. 
The type species, attaining a length of about 0-2. Length of 
head with opercular apparatus much exceeding the maximum depth 
°f the trunk, which is contained nearly four times in the total length 
to the base of the caudal fin. Dorsal spines gradually increasing in 
length to the fourth, thence diminishing ; but the length of the 
longest spine considerably less than the depth of the trunk at its 
insertion and less than the length of the longest divided ray of the 
posterior dorsal fin. Anal spines very stout ; the second not much 
larger than the third, but all considerably shorter than the succeeding 
divided rays. 
Form. § Loc. Lower Miocene (Lignite): Puy-de-D6me, I ranee . 
27736. Fine specimen 0-175 in length, and five fragments ; ^ anat - 
Croizet Coll. 
1920, P. 3913. Portions of two larger specimens ; Menat. 
Egerton 4' Enniskillen Colls 
27(36 a. Six immature specimens ; Menat. Croizet Coll. 
1918. Immature specimen ; Menat. Egerton toll. 
Properca beaumonti (Agassiz). 
1834. Perea beaumonti, L. Agassiz, Neues Jahrb. p. 383. 
1836. Perea beaumentii, L. Agassiz, Poiss. Foss. vol. iv. p. 81, ph xi a. 
1873. Perea ( Percichthys ) beaumonti, H. E. Sauvage, Bull. Soc. G4ol. 
France [3] vol. i. p. 388. 
1880. Properca beaumontii, II. E. Sauvage, Bull. Soc. Geol. France [• J 
vol. viii. p. 452. 
type. Imperfect fish ; School of Mines, Paris. 
A comparatively robust species, attaining a length of about 0 -. 
length of head with opercular apparatus not exceeding the maximum 
depth of the trunk, which is contained about three times in the total 
length to the base of the caudal fin. 
1 Thu species is also recorded from the Upper Miocene of Radoboj, Croatia, 
hy P. Bassani, Atti Soc. Veneto-Trent. Sci. Nat. vol. vii. (1880), p. 88. 
2 L 2 
