1134 Bulletin 47, United States National Museum. 



canines; no movable teeth; base of tongue without teeth , edge of tongue 

 with linear patches of teeth. Lower margin of preopercle simply serrate 

 or entire, the seme not greatly increased in size toward the angle, and 

 none of them developed as antrorse hooks. Spines strong, 10 in the 

 dorsal iin ; dorsal fins more or less connected by membrane: second anal 

 spine much enlarged, not shorter than third ; anal rays III, 8 or 9- lower 

 margin of j)reopercle finely serrate, without antrorse spines. Lower 

 jaw slightly projecting; vertebra^ 12 + 13 =; 25. Scales rather large, 

 ctenoid; top of head scaly; lateral line little arched. Veutrals inserted 

 well behind pectorals. Two known species, both American (Name 

 unexplained.) 



<i. Longest dorsal spine considerably more tbaii half head; color brassy yellow, with 1 very dis- 

 tinct longitudinal black lines, interrupted posteriorly; dorsal fins slightly connected; 

 spines all very robust. interrupta, 1531. 



aa. Longest dorsal spine about half head; color green or olivaceous and silvery with faint 

 streaks; dorsal fins well connected; spines moderate. Americana, 1532. 



1531. MORONE INTERRUPTA, Gill. 

 (Yellow Bass.) 



Head 3; depth 2|. D. IX-I, 12 ; A. Ill, 9 or 10; scales 7-50 to 54-11. 

 Body oblong, ovate, the back much arched ; head depressed, the snout 

 somewhat pointed, the anterior profile concave ; eye large, as long as snout, 

 \\ in head ; preorbital finely serrate ; suprascapula serrate ; mouth small, 

 somewhat oblique, the maxillary reaching middle of orbit, about 3 in 

 head ; maxillary somewhat scaly ; gill rakers moderate, x -|- 13 to 16, 

 longer than gill fringes; dorsal and anal spines very robust, the longest 

 dorsal spine 1* to If in head, the longest anal spine 2 to 2^ ; dorsal fins 

 slightly connected. Color in life brassy yellow, with about 7 very dis 

 tinct longitudinal black lines, those below the lateral line interrupted 

 posteriorly, the posterior part alternating with the anterior. Length 15 

 inches. Lower Mississippi Valley, north to Cincinnati and St Louis, 

 chiefly in the channels of the larger streams; rather common southward; 

 a good food-fish. {i7iterruptus, interrupted, referring to the longitudinal 

 black lines.) 



Morone interrupla, GiLL, Proc. Ac. Nat. Sci. Phila., 18G0, 118, St. Louis; New Orleans: Gill, 



Ichth. Rep. Capt. Simpson's Sur. Great Basin Utah, 398 pi. 2, figs. 1-8, 1876, Jordan & 



Gilbert, Synopsis, 530, 1883; Jordan & Eigenmann, (. c, 420, 1890 

 Morone mksissippiensis, Jordan & Eigenmann, Proc. Ac. Nat. Sci. Phila., 1887 (substitute name for 



intemipta, regarded as preoccupied, as it has been used for a species of Rocciis, a genus at that 



time merged in Morone); Boulenger, Cat., i, 127. 



1532. MORONE AMERICANA (Gmelin). 

 (White Perch.) 



Head 2| to 3 ; depth 2^ to 3. D. IX-I, 12 ; A. Ill, 8 or 9 ; scales 8-50 to 

 55-12, 50 to 55 pores. Body oblong, ovate, the back moderately elevated; 

 head depressed above eyes ; the snout rather pointed; mouth small, some- 

 what oblique, the maxillary not reaching middle of oibit, 2* in head, its 

 width at tip half eye ; preorbital entire ; eye moderate, scarcely as long 



