Jordan and Ever mann. Fishes of North America. 1067 



it be from #0ew, to strain, and oro/m, month ; grfpof, different, and 

 arb/ua, would make Heterostoma.) 



. Lateral line complete (a few tubes very rarely wanting). 



b. Gill membranes more or less broadly connected across the isthmus; ventrals separated 

 by a distinct interspace, whichlis not so wide as base of the fin; anal spines nor- 

 mally 2. 



P<ECILICHTHYS (jroiKtAo?, variegated; ix0v?, fish): 



<>. Anal fin nearly as large as soft dorsal; spinous dorsal with about 13 spines; head 

 almost naked; fins very large; colors brilliant. VARIATUM, 1454. 



NAXOSTOMA (i/ai/os, small; <rrdju., mouth): 



cc. Anal fin much smaller than soft dorsal; spinous dorsal with 9 to 12 spines. 

 <l. Head entirely naked. 



e. Scales moderate, 48 to 57; pectoral % longer than head; D. about XII-13; 

 sides with dark green spots. SWANNANOA, 1455. 



ee. Scales rather large, 40 to 48. 



/. Pectoral about as long as head; D. about X-ll. 



g. Head large, 3% to 4 in length; sides with dark green blotches. 



THALA8SINUM, 1456. 



gg. Head rather small, 4% in length; males with series of scarlet 



spots along the rows of scales. INSCRIPTUM, 1457. 



ff. Pectoral much longer than head; D. XII-12; body robust; the depth 



4% in length ; color olive with dark oblique bars. BLENNIUS, 1458. 



<M. Head not entirely naked. 



7*. Cheeks naked; opercles scaly; scales 50 to 60; body slender, the depth 5% 



in length; color green, with darker markings. RUPESTRE, 1459. 



hh. Cheeks and opercles scaly (rarely naked); body slender, the depth 5 to 6 



in length. D. about X-ll; pectoral about as long as head. 

 i. Scales about 42; males with series of dark spots along the rows of 

 scales. ELEGANS, 1460. 



il. Scales about 50; no distinct dark spots along series of scales. 



ZONALE, 1461. 



iNoTHONOTrs (vo06?, prominent; VWTOS, back): 



66. Gill membranes scarcely connected across isthmus; first dorsal long; anal rather 



small; ventrals near together, the interspace very narrow. 

 j. Humeral region without enlarged black scale. 



It. Head short, the muzzle abruptly decurved; scales 50 to 58;Jvertical fins black- 

 edged ; breast blue in life. 



1. Dorsal spines 11 or 12. OAMTTRUM, 1462. 



IL Dorsal spines 14. VULNERATUM, 1463. 



AA-. Head rather long and pointed, the snout not decurved. 



//. Scales rather small, 56 to 63; body and fins variegated with red. 



n. Color olive; throat blue; sides in male with crimson spots and a 



brown, wavy, lateral band. D. XII-12. MACULATUM, 1464. 



mi. Color yellowish, with 4 dark bars; 10 to 12 oblong dark spots on 



sides; fins with red in male; D. XI-12. CINEREUM, 1465. 



unn. Color greenish, with 8 to 10 transverse bluish bands; between each 



pair a bluish rhomb; a black caudal spot; fins with yellow. 



D. XII-13. TESSELLATUM, 1466. 



mm. Scales rather large, about 45; male olive with quadrate red spots on 

 sides; breast blue; belly orange; fins ornate; form robust. 



RUFILINEATUM, 1467. 



jj. Humeral region with an enlarged black scale; scales 43 to 55. D. X-ll; color 



olivaceous, with 8 to 10 dark cross bars; form robust. JORDANI, 1468. 



aa. Lateral line more or less incomplete (occasionally nearly or quite complete in jes^ise and 



in squamiceps); ventrals close together, the interspace very slight; first dorsal and anal 



rather small. 



