476 
ACTIXOPTERYGII. 
U. elongata, Pellotti (Hid. p. 435), and U. microlepidoia , Bellotti 
(ibid. p. 433). Of U. elongata, the type specimen is in the Milan 
Museum : of the other species, the types are in the Stoppani Collec¬ 
tion. 
Genus PHANEROSTEON, Traquair. 
[Trans. Boy. Soc. Edinb. vol. xxx. 1881, p. 39.] 
Trunk fusiform, elongated. Mandibular suspensorium oblique: 
[de-ntilwm-unknown]. Ein-rays delicate, articulated, aud distally 
bifurcating, fulcia absent. Dorsal fin elevated, not acuminate, 
opposed in great part to the space between the pelvic fins and the 
anal; caudal fin somewhat forked, inequilobate. Trunk naked, or 
with rudiments of rhomboidal scales anteriorly; upper caudal lobe 
invested with elongated rhomboidal scales. 
Phanerosteon mirabile, Traquair. 
1881. Plainerosteon mirabile, B„ H. Traquair, Trans. Roy. Soc. Edinb. 
vol. xxx. p. 39, pi. iii. figs. 6-8. 
Type. Imperfectly preserved fish; Geological Survey of Scotland. 
The type species, attaining a length of about 0-08. Head and 
opercular apparatus occupying about one quarter of the total length • 
cranial roof-bones tuberculated; expansion of maxilla exhibiting 
striae parallel with the hinder and superior margins, and its dentary 
border finely tuberculated; mandible obliquely striated. Few 
remnants of scales immediately behind the clavicle. 
Form. Sf Loc. Calciferous Sandstones (Cement-stone Group): Esk- 
dale, Dumfriesshire. 
P. 4703. Imperfectly preserved individual. Purchased , 1884. 
P. 5984. Fish wanting the greater part of the fins. 
Purchased , 1889. 
P. 5984 a. Imperfect caudal region, and portions of the paired fins. 
Purchased, 1889. 
Genus PAL.^sOlXnESG'U’S, Blainville. 
[Houv. Diet. cTHist. Hat. vol. xxvii. 1818, p. 320 (Paleeoniscum).] 
Syn. Palceotlirissum, H. D. de Blainville, ibid. p. 320. 
Eupaleeoniscus, A. Rzehak, Verhandl. k.-k. geol. Reichsanst 
1881, p. 79. 
