COPE ON ICHTHYIC FAUNA OF THE GREEN RIVER SIIALES. 815 
The length of the head enters the total four ‘times, and that of the orbit 
enters. the head 4.66 times, and into the length of the muzzle one and 
one-third times. The protile of the top of the head is slightly convex, 
and the dorsal line is also slightly convex. The mouth opens somewhat 
obliquely upward. The end of the maxillary bone reaches a point below 
the middle of the orbit. The teeth of the inferior border of the pre- 
operculum are strong, and are directed forward; they number five. The 
angle of the lower. jaw is not produced, but the inferior edge of the ramus 
is laminar and acute; the symphysis is shortly truncate. The superior 
edge of the maxillary bears a supernumerary bone at its distal portion. 
- There are six branchiostegal rays preserved, with impressions of two 
others: the anterior three are slender; the others wide,.as in allied gen- 
era. There is a low supraoccipital crest. The abdomen bears fourteen 
rows of scales below the vertebral column, and six rows may be counted 
above it; on the candal ee I count 5—5. 
Measurements. 
M. 
Total len tt hicsas smacee ews ceecemsaeaeanece ene vsiae nates xo eine Qed el ve eRe Sew 0.280 
Axial length of head wovcoccsceassesonsensecaaecstgecde el sede cece esses geese 0070 
Axial length to line of first dorsal spine.......-. 2.2.22. cee eee ee ee eee ss6 Seo nici 0.085 
- Axial length to line of first ray of second dorsal ........---. -00 22 - e+ eee eee 0.143 
Axial length to line of first anal spine... 2.2.2.2. ee eee cee eee ee eee 0.152 
Axial length to base of caudal...-...----- 022-2. cee e ee eee eee cee ee eee Suerpelewiws 9,232 
Depth: ab OPD ib. cic coins tea cissicicie eisieinic ye eieiciersinig wien See SEES ESE See HE bei 0.051 
Depth at first anal ray ....-.---- i eamsieJanneenemenamaceeesneaer Peoceaeteisecess 0.055 
Depth of caudal peduncle....-,.-.----. 20. eee ee eee eee eee eee eee eee ees 0,080 
Length of third dorsal spine... 02. --- ---. eee nee cece cee eee cee ee eee ee eee ee 0.030 
Length of second anal spine.-... .- toi wis Gusta Srmeieis dea, ee acee sie emieeenels one od so 6 ace 0.016 
MIOPLOSUS LONGUS, sp. nov. 
I have questioned the right of the form to which the above name is 
given to be maintained as a species distinct from the M. labracoides. It 
is represented by two individuals of much smaller size than those of the 
latter, and which are of a more elongate forni, They have also two anal 
radii fewer. 
The formule are:—D,. [IX—12; A. bon 12. Vertebree: D.10; C.15. The 
depth at the first dorsal fin enters the total length five fa and the 
depth at the first anal ray three and one-half to three and eight-tenths 
times. The dorsal spines are straight and slender, the posterior ones 
very short. The caudal is forked. The teeth of the inferior border of 
the preoperculum are strong and acute; there are three large and two 
small ones. 
Measurements. 
M. 
Total length .-.--. 0.2222 eee e ee teen ee cee nee cee nee cere ee cree cette cote ee eee 0.175. 
Length of head ..--2. +--+ 2-0 eee eee eee eee cee ee eee eee ee S eR Repwek oe cxeet 0.042 
Length to line of first dorsal .--2...-.-20----2+ eens cee e eee renee cree cere eee 0.054 
Length to line of second dorsal ......-.- cAcinigd.o wats gem qusix tees Seeiets eeteeins ve Rese 0.085 
Length to line of anal_...-.-.----------+-+-+- fo oases e en mewe as perce cece eens face 0.091 | 
