rALJEONISCIDiB. 
445 
An imperfectly known species of moderate size. Trunk robust; 
dorsal margin gently arched in advance of dorsal fin. Head-bones 
marked with coarse vermiculating ridges; teeth of mandible in 
regular close series, very slender. Dorsal fin arising opposite the 
hinder portion of the pelvic pair. Scales relatively smaller and 
thicker than those of A. decor us, scarcely deeper than broad on the 
middle of the flank, those of the anterior ventro-lateral region 
feebly crenulated and serrated. 
Form. Sf Loc. Permian : Prussia. 
& 
P. 3461. Type specimen, displaying the mandibular teeth ; Gold- 
lauter. Enniskillen Coll. 
P. 3482. More imperfect, larger head and abdominal region ; Gold- 
lauter. Enniskillen Coll. 
Amblypterus reussi (Heckel). 
1861. Palceoniscus reussii, J. J. Heckel, Denksckr. k. Akad. Wiss., 
matk.-naturw. Cl. vol. xix. p. 61, pi. vii. 
1877. Amblypterus reussii, K. H. Traquair, Quart. Journ. Geol. Soe. 
vol. xxxiii. p. 558. 
Type. Nearly complete fish ; Royal Bohemian Museum, Prague. 
Trunk short and deep, the maximum depth in advance of the 
dorsal fin contained about three and a half times in the total length. 
Head and opercular apparatus occupying less than one quarter of 
the total length; external bones marked with fine striae and rugae. 
Pelvic fins well developed, inserted halfway between the pectorals 
and the anal; dorsal arising behind the middle of the back, high, 
triangular, and short-based, directly opposed to the slightly smaller 
anal. Scales large, those of the middle of the flank deeper than 
broad; all smooth, except two or three anterior series, which 
exhibit delicate fiutings and crenulations at the free margin. 
Form.. Loc. Lower Permian : Semil, Bohemia. 
Not represented in the Collection. 
9. '/^L, 
Amblypterus blainvillei (Agassiz). 
1818. Palceothrissum incequilobum , H. D. de Blainville, Nouv. Diet, 
d’Hist. Nat. vol. xxvii. p. 321 (imperfectly defined). 
1818. Palceothrissum parvum, H. D. de Blainville, ibid. p. 321 (imper¬ 
fectly defined). 
1833. Palceoniscus blainvillei, L. Agassiz, Poiss. Foss. vol. ii. pt. i. pp. 4, 
48, pi. v. 
