90 



PROCEEDINGS OF UNITED STATES NATIONAL MUMEmi. 



the inner surface roughened, scarcely dentate. Branchiostegals six. 

 Maxillary with a small but j^erfectly distinct supplemental boue. Eye 

 very small, considerably less than length of snout (perhaps an individ- 

 ual character). Nostrils in line with pui)il. Preorbital quadrate, mostly 

 below line of inipil ; preoperculum moderately large, lower angle rounded, 

 very slightly obtuse. Scales on cheeks moderate, in six to seven rows. 

 Opercle rather large, triangular, with the posterior angle j^roduced into 

 a rounded bony tlap, nearly equaling the snout in length. The tlap is 

 of a shiny black color as in L. cyanellus, surrounded by a very broad 

 membranous margin, which is white in the alcoholic specimen. Scales on 

 the opercle large, in tive rows. Suboperculum of nearly the same width 

 throughout, with a single row of scales. Interoperculum wider than 

 suboperculum, with abouta rowand a half of scales. Scales continued uj)- 

 wards a short distance between opercle and preopercle. Spine of the 

 premaxillary stout and broad ; width at base equal to one-third of inter- 

 orbital space, moderately long, reaching to posterior nostril. Mucous 

 channel from eye to suprascai)ular bone extremely narrow, scarcely sep- 

 arating the scales. Scales moderately large, ctenoid. Dorsal begiu- 

 ' uing over base of pectorals. Dorsal and anal somewhat obliquely oj)- 

 posed. Spinous portion of dorsal fin low, the longest spine reaching 

 very little past margin of eye. Spines not very stout, nearly straight ; 

 all but the first two of nearly the same height. Soft portion of dorsal 

 much higher than spinous, reaching greatest height at seventh and 

 eighth rays, behind which it descends abruptly. Both caudal peduncle 

 and fin short and stout. Soft portion of anal rounded. Insertion of 

 veutrals behind base of pectorals, not reaching beyond vent. Pectorals 

 short, only reaching vent. Scales in front of pectorals not much re- 

 duced, considerably larger than those on cheeks. The description of 

 the species is taken from a single specimen, IsTo. 4109, in the United 

 States jSTational Museum, from Fort Gratiot, Michigan, at the foot of 



Lake Huron. 



Table of Measurements. 



Species: Lepomis euryorus. 



Current number of specimen , 

 Locality 



Dimensions. 



Extreme leagth. 



Body : 



Greatest height 



Greatest wiclth 



Least height of tail 



Length of caudal peduncle 



Head : 



Greatest length without car-flap . 



Distance from snout to nape 



G reatest width 



Width of interorbital area 



Lcugtli of snout 



Length of ear-flap 



Length of maxi llary 



4109. 

 Fort Gratiot, Michigan. 



Inches and 

 lOOths. 



fi 64 



lOOths of 

 length. 



43 

 13i 



l;i 



16 



