Cope.] 480 [July 19, 
while the latter is not seen in any genus. The bristle-like bodies are 
seattered over the whole extent of the fish, excepting the head and the 
fins, and are arranged in little aggregations, which are irregularly dis- 
posed. The processes themselves lie irregularly together, as though 
free from each other, and are evidently not the impressions of keels of 
the scales. Traces of other scales are not visible, and the bodies described 
would suggest the existence of an ossified ctenoid fringe on a less fully 
calcified scale, or possibly without such basis. 
TRICHOPHANES HIANS. Cope. Sp. nov. 
Vertebre, D. 9; C. 15; six between interneural spine of dorsal, and 
interheemal of anal fin. Radii, 1. IE. (?) 6 (soft rays somewhat injured) ; 
A. II. 7; V. and P. not all preserved; caudal rays numerous, forming a 
deeply bifurcate fin. The ventrals reach a little over half way to the 
anal, and the latter about half way from its basis to that of the caudal 
fin. The dorsal fin, laid backwards, reaches the line of the base of the 
first analray. The first dorsal ray is a little nearer the end of the muzzle 
than the origin of the caudal fin. The muzzle is very obtuse, and if the 
specimen be not distorted, not longer than the diameter of the orbit. 
The gape extends at least to the posterior line of the orbit. The subor- 
bital region deep posteriorly. 
In its present somewhat distorted condition the specimen measures in 
M. 
Total length..... Bet OP Nee er eee OE oa 0.059 
LGA sea tiaies EOP ial eae. at pa wares 016 
Vertebree ...... Corea: DCT Lo cs We eS Seca CO ricas 029 
Cod aliines 25475 s5, ses PDS ies es ee ees .0142 - 
Lienopidorsal: spies 6 ses ies ou MOS ee eee fence 008 
af AAs aCe te ieee es .008 
bie Ot Wires Bodies et. ia de ses an 220005 
Amyzon. Cope. Genus novum Catostomidarum. 
Allied to Bubalichthys. Dorsal fin elongate, with a few fulcral spines 
in front, and the anterior jointed rays osseous for a considerable part of 
the length. A few short osseous rays at front of anal fin. Scales cycloid. 
Caudal fin emarginate. Mouth rather large, terminal. 
The characters of this genus appear to be those of the Catostomide. 
There are three broad branchiostegals. The vertebra are short, and the 
hemal spines of the caudal fin are distinct and rather narrow. In one 
specimen a pharyngeal bone is completely preserved. Not having it 
before me at the moment, I merely observe that it is slender, and with 
elongate inferior limb, The teeth are arran ged comb-like, are truncate, 
and number about thirty to forty. This and other portions of the struc- 
ture will be more fully described when the whole series of specimens is 
investigated. The bones bordering the mouth above are a little dis- 
placed, and the lower jaw projects beyond them, and is directed obliquely 
upwards. The dentary bone is slender and toothless, and the angular is 
