﻿47(> ACTINOPTERYGII. 



U. elovgata, Pellotti {Hid. p. 4?5\ 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. Roy. Soc. Edinb. vol. xxx. 1881, p. 39.] 



Trunk fusiform, elongated. Mandibular suspensorium oblique ; 

 [dentition unknown]. Fin-rays delicate, articulated, and distally 

 bifurcating ; fulcra 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 rhomboid al scales anteriorly ; upper caudal lobe 

 invested with elongated rhomboidal scales. 



Phanerosteon mirabile, Traquair. 



1881. Phanerosteon mirabile, R. H. Traquair, Trans. Roy. Soc. Edinb. 

 vol. xxx. p. 39, pi. hi. tigs. 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. 4' 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, 1S89. 



Genus PAL-flBONISCUS, Blainville. 



[Xouv. Diet. d'Hist. Nat. vol. xxvii. 1818, p. 320 (Palaioniscum).~\ 



Syn. Palceoihrissum, H. D. de Blainville, ibid. p. 320. 



Eupalceoniscus, A. Rzehak, Verhandl, k.-k. geol. Reichsanst, 

 1881, p. 79, 



