﻿466 



.UTIXOPTERYGIl. 



Type. Imperfect fish. 



A small robust species, attaining a length of about 0*08. Maxi- 

 mum depth of trunk contained about four times in the total 

 length. Head relatively small, and external bones coarsely striated. 

 Dorsal fin arising slightly in advance of the anal, and the latter 

 much elongated. A continuous series of enlarged ridge-scales from 

 the dorsal fin to the occiput ; flank-scales as broad as deep ; scale- 

 ornament consisting of irregular transverse striae, more or less 

 oblique, terminating in coarse blunt serrations of the hinder border. 



Form. <Sf Loc. Lower Carboniferous : Albert Co., New Brunswick. 



P. 1010. Imperfect specimen, wanting the upper caudal lobe ; 

 Hillsborough. Egerton Coll. 



P. 5193-4. Remains of a group of fishes, and three detached 

 specimens displaying the squamation ; Hillsborough. 



Purchased,, 1885. 



Rhadinichthys modulus (Dawson). 



1877-78. Palceoniscus (Rhadinichthys) modulus, J. W. Dawson, Canadian 

 Nat. n. s. vol. viii. p. 337, woodc. fig. 1, and Acadian Geology, 

 Suppl. p. 100, woodc. fig. 18. 



Type. Imperfect fish ; Peter Redpath Museum, Montreal. 



A species closely related to R. alberti, described as distinguished 

 by its relatively shorter anal fin, the coarseness of the scale- 

 ornament, and the truncation of the dorsal ridge-scales. The last- 

 mentioned character may be a false appearance. 



Form. 6f Loc. Lower Carboniferous : Albert Co., New Brunswick. 



P. 6219. Two specimens, wanting the head ; Petitcodiac River. 



Presented by Sir J. William Dawson, 189U. 



Rhadinichthys tenuicauda, Traquair. 



1877. Rhadinichthys tenuicauda, R. H. Traquair, Proc. Roy. Soc. 

 Edinb. vol. ix. p. 443. 



Type. Fish ; Edinburgh Museum. 



A small species, attaining a length of about 0-08. Body very 

 slender and elongated, narrowly tapering posteriorly. Head-bones 

 finely ornamented with vermiculating striae. Fin-rays delicate, 

 smooth, with distant articulations ; dorsal and anal fins almost 

 completely opposed, considerably in advance of the caudal fin. 

 Scales relatively large, posteriorly serrated, nearly smooth on the 



