Jordan and Evermann. Fishes of North America. 2775 



basal half of their outer margin; almost the entire inner margins serrate, 

 the spines of equal length, H in. head; distance of adipose fin from the 

 dorsal 3| in the length ; the adipose more than ^ as long as the dorsal 

 fin, its posterior margin free ; caudal deeply forked, the upper lobe longer, 

 somewhat falcate, 3f to 4 in length ; anal fin about as long as high, deeply 

 emarginate, its highest ray 2f in head ; ventral fins not reaching to the 

 anal, 2 in head. Dorsal surface dark blue, with metallic luster, becoming 

 silvery below; lower caudal lobe dusky; basal half of the inner surface 

 of the paired fins black. (Eigenmann & Eigenmann, Nematognathi, 79.) 

 Panama; known only from specimens in the Museum of Comparative 

 Zoology. The specimens from Mazatlan referred to jordani, seemanni, and 

 assimilis by authors belong to Galeichthys gilberti. 



188(8). GALEICHTHYS AZUREUS, Jordan & Williams. 



Head 3i; width of head 4f ; depth 9. D. I, 7; P. I, 10; A. IV, 14. Gill 

 rakers 6 + 13. Body robust, its width anteriorly greater than its depth ; 

 caudal peduncle short, stout; distance from end of anal fin to base of 

 median caudal rays about -J- length of head. Head flat, very broad, its 

 depth at posterior angle of jaw about | its width; interorbital region flat, 

 smooth anteriorly and granulated posteriorly; fontanel almost obsolete, 

 wide anteriorly and ending in a short groove posteriorly at a point -J- dis- 

 tance from tip of snout to posterior end of occipital process; top of head, 

 occipital process, and antedorsal shield finely granular, granulations 

 mostly arranged in radiating stria) and extending forward to a line with 

 the pupils; nostrils very large and close together, posterior one with a 

 broad valve; occipital process pentagonal, its length 4 in head, about as 

 long as wide, with a very low ridge ; dorsal shield crescent-shaped, with 

 points extending back on each side of fin, its median length about the 

 length of the side; eye small, about 9 in head; interorbital width almost 

 2 in head; snout almost 4 in head; breadth of mouth 2-fo in head; maxil- 

 lary barbel slender, thick at base, If in head ; outer mental barbel reaching 

 to posterior angle of jaw, about 2f in head ; inner mental barbel about 4 in 

 head ; teeth all villiform ; preinaxillary band narrow, about ^ as wide as 

 long : vonierine and palatine bands of teeth fully confluent on each side, 

 forming together a crescent-shaped patch, narrowly divided on the median 

 line of the vomer ; form of vomerine bands similar to that of the palatine 

 bands but smaller; palatine band of teeth without backward prolonga- 

 tions; opercle with radiating ridges; humeral process granular, trian- 

 gular, lower posterior corner prominent; axillary pore very small; gill 

 membranes forming a broad fold across isthmus ; dorsal fin short, base not 

 including spine equal to base of adipose dorsal ; dorsal spine robust, but 

 little shorter than pectoral spine, about 2 in head, its anterior serrss small 

 and tubercle-like, its posterior edge, as well as that of pectoral, retrorsely 

 serrate; soft rays of dorsal extending but little beyond spine, the longest 

 about f length of head ; adipose dorsal about | as high as long ; caudal 

 lobes unequal, the upper lobe about ^ longer than lower lobe ; anal short, 

 of medium height; distance from vent to base of ventrals | distance from 



