EXPLORATIONS ACROSS THE GREAT BASIN OF UTAH. 

 MORONE INTERRUPTA, Gill. 



' is oh,,,,,, ovate, with the back at the comnieneement of the dorsal tin 

 lls ', l Iuj - mitest llei - ht mmw *»* *1>""™ dorsal equals three-tenths of 

 n tne snout to the concave niacin of the caudal tin. The dorsal outline 

 L-s under the spinous dorsal and little more under the rayed. The abdom- 



is ronieal in profile, sli-l.tly depreted at lllei'npe, and thenee nearly 

 -ut. ^leheadtHnnthesnouttothe^.pernd.rspinehn-n.srlnve-tenths 



rd; the pectinate niacin is nearly vertical; the distance betweon the matins near 

 angle exceeds half the diameter of the eye. The teeth of the posterior mar-in 

 ome stronger toward the angle ; the inferior margin is weaklv serrated along "it- 

 tenor halt. The operculum has two spines, separated bv an" obliouc sinus the 

 enor one is blunt and almost rounded * 



The dorsal fin commences at a vertical intermediate" between the bases of the pec- 

 d and ventral fins and „ of a triangular form, the fourth ra V being the largest mid 

 almg the length of the pectoral tin ; the spines have the same form and arrangement 

 nose ot Mot one amencana. The second dorsal is connected by a membrane as in 

 ram amrkana; ite spinous or first ray is little more than half the length of the' first 

 ciliated one, which itself is nearly as long as the fourth dorsal spine; the fin thence 

 leases m neigbt toward its last ray, which is shorter than the spinous ray. 



liie anal tin commences under the fourth or fifth articulated ray of the second 

 vi , am a .out tour ot its rays are posterior to the termination of that fin; the first 

 re stooT tib h' 8eC ° nd alm ° St tW ° and a Imlf times longer ' com P ressed > 

 first articulated ray of the anal is longer than the spine ■ aLlThom Twice aHon- 

 .10 last; the outline of the fin is slfgh% emargmated ' 8 



The first ray of the pectoral fin is, as usuaC articulated, but simple; the third is 



vo-thirds of that of the first or second branched ravJ "^ ' ° * S1>mt ' " ^^ 

 The radial formula is as follows: 



D. IX. I. 12; A. III. 10; C. 4. I. 8. 7. J. 3; P. 2. 14; V. 1. 5. 



