COPE ON ICHTHYIC FAUNA OF THE GREEN RIVER SHALES. 817 
soft ones, but the posterior spines are shorter than the anterior soft 
rays, So as to produce a wide emargination in the superior outline. The 
spines are very robust, especially those of the pectoral and anal fins. 
The first anal spine is near two-thirds the length of the second. The 
pectoral fin does not extend to the anal, and the soft parts of the anal 
and dorsal, which are equal, do not overlap the base of the caudal. 
Radii: D. X—11; A. II1I—10; C. ?—17—?.. Vertebrae: D. 9;C.14. The 
centra have a strong median lateral ridge, which separates two fossx. 
The greatest depth is at the base of the ventral fins, or the third dor- 
sal spine; it enters the total length (with caudal fin) two and four- 
tenths times. The length of the head enters the same three and four- 
tenths times. The orbit is large, its diameter exceeding the muzzle and 
entering the length of the head a little over four times. The mouth is 
terminal, and the premaxillary extends obliquely downward and back- 
ward; the maxillary reaches the line of the anterior border of the 
orbit. 
The scales are longer than deep, and the rough aunties has but a 
small extent, and is finely granulated. The remainder of the scale is 
marked with strong concentric grooves. Those on the gular region are 
small. On the belly, there are seventeen rows (about) below the ver- 
tebral column. A row of scales extends along the postero-inferior edge 
of the operculum. This part is well preserved in only one of the three 
specimens which represent the species. 
Measurements. 
: M. 
HO tal JONG tM cece qrccasseScennsecesassesaemasaawnacie aia eet aeminse eee eeeateee 0.217 
Length of head .....2. 20.2. cece cence e cee eee eee safe eae hints SE Soa comes wee aeae 0.064 
Length to line of first spine of first dorsal .......---.. 222.0 eee ee eee eee eee 0.070 
Length to line of first spine of second dorsal ...-2. 02-226 cee eee cee e ee ee ee teens 0.121 
Length t6.1ine Of anal ..0...220 senso cccsee Chee wasn esis a6 sine Gen mee secici peices, 0.122 
Length to base of caudal ....-..-...--.------se-e eens feishaibisislavalaiteuniuts seietgleimtnnie 0.173 
Depth at first dorsal spine: .1.22. 02 02te scene ess deneesiginain scenes seis vitinie sees 0.093 
Depth at first dorsal soft ray . 22. 022-2. 2-22 een cee cee ee eee ce ee cnet 0.070 
Depth of caudal peduncle. ...---. .--- 2. cee ene cece cece eee cence eee tenes 0.027 
Length of fourth dorsal spine ... 22-22-20. eee cnn cone ee cee eee ee eens cee eee 0.030 
Length of second anal spine -.-.. 1.2.2. cee ene cee cee eee eee cece eee ene 0,027 
This species is about the size of the Crappie, Pomoxys annularis. 
PRISCACARA CYPHA, sp. nov. 
This species is nearly related to the last, but presents a number of: 
differences which require its separate consideration. These are:—(1) The 
more arched or convex dorsal outline; (2) The relatively longer head; (3) 
The presence of an additional dorsal spine; (4) The entire covering of 
the operculum with scales. There is also probably a smaller number of 
dorsal vertebree, but this is not certain, as that region has been some- 
what disturbed. Formule :—Rays: D. XI—10—11; A. WI—9; P. 15. 
Vertebre, 6-14. 
