a Scientific Intelligence. 
** This ancient character of some of the American fishes ied most 
“remarkably with the pecalae of the vegetation of this continent, - 
which, as I have shown on fagmey occasions, resembles also ‘he fossil 
—— of prior ages. 
** The geographical ranges these peculiar, old-fashioned beige is 
also very remarkable, they. living in temperate, or rather me, climates, 
ee? their earlier representatives lived in warmer epoc 
he it striking features of the fishes ‘of the thintiary period and . 
ur time consist in their belonging to two groups of the class 
only 5 on i the Ctenoids, with rough, combed scales, in which the re- 
spective representatives ve aiso prominent serratures on prominent i 
- Spines upon the head, in the o Pi Sine in particular, ae in the fins 5 
be The cont form of this genus reminds ‘us of the common perches, a 
but it is easily distinguished from them, by the fact that its head and ‘e 
the opercular apparatus are smooth and unprovided with dealin aa ig 
as also by the presence of a small adipose fin, as in the salmons. ‘The 
anterior dorsalis: also a small fin, composed of soft branched articula- : 
ted rays, as in the salmons. The ventral fins are placed at the middle +a 
of the abdominal cavity, as in the Abdominales in eral. i 
scales, however, are truly serrated as in the Percoids, a structure whic! 7 
as far as oes not occur in any of the Abdominales. Th 
conformation of. the mouth is also as in the Perches, that is to say, t 
intermaxillaries form alone the upper margin of the mouth, and the™ i: 
maxillaries stand behind as a second arch, but the vomer and palate are 
eatirely destitute of teeth. 
_“ This fish, of which I shall publish a full anatom: ees ee 
Shomdeare as the type of a distinct family, under wi 
Spévies Percopsis guttatus. 
The other new species described are :— 
5. 
Cottus Franklini, p. 303. 
oleosoma maculatum, p. 305, plate iv, fig. 3. 
‘tleoma zebra, p. 
Gasterosteus nebulosus, p- 310, pl. iv, fig. We 
Gasterosteus pemee p. 314, i iv, 7a iy - 
nr pe 
4 usa, 
