L. Hussakof — Note on a Palcwniscid Fish. 349 



fins (fig. 1). It measures 13*6 cm in length as far as preserved, 

 and when complete must have been a fish of abont 21 cra . An 

 angular elevation on the upper side near the posterior extrem- 

 ity of the specimen apparently indicates the position of the 

 dorsal fin. 



It is plain that the fish belongs to the family Palwoniscidce. 

 It is gracefully fusiform, its depth somewhat less than the 

 length of the head, and contained about five times in the esti- 

 mated total length. The maxilla is of the usual palaeoniscid 



Fig. 2. 



Details of head and scales ; natural size, except d, which is x 4. a, 

 Head traced from the specimen shown in fig. 1 : d, dentary ; hyo, hyo- 

 mandibular ; mx, maxilla; op, operculum, b, Scales from anterior portion 

 of flank a little below the middle, c, Narrow scales from near ventral mar- 

 gin, d, Scale, x 4, to show ornamentation ; taken from the second of the 

 two specimens. 



form, consisting of a subrectangular plate with the lower ante- 

 rior angle drawn out into a narrow, sub-ocular process. The 

 mandible is rather strong. It is armed with short, stout, widely 

 spaced laniaries, in the spaces between which are very small, 

 blunt teeth, irregularly spaced. The hyomandibular is inclined 

 forward. The eye is placed farther back than in Palceoniscus. 

 The scales behind the operculum are not deepened. The flank 

 scales are as broad as deep, and in some places, even broader 

 than deep. The ventral scales are very narrow, their width 

 twice or more their depth. The ornamentation of the scales 

 can be made out in some of them ; it consists of fine parallel 

 lines along the anterior and posterior margins, and a number 

 of coarser, more or less broken and branching lines extending 

 diagonally across the scale. The ornamentation of the cranial 

 plates is not shown. 



The second specimen consists of a patch of flank scales from 

 the region near the anal fin. It adds only one or two facts to 



