Jordan and Everman^i. — Fishes of North Amaica. 2775 



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

 the spines of equal length, 1^ in head; distance of adipose fin from the 

 dorsal 3f in the length ; the adipose more than I as long as the dorsal 

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

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

 emarginate, its highest ray 2t 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 jiaired fins black. (PMgenmann «& 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 gUberti. 



188(a). GALEICHTHIS AZUREUS, Jordan & Williams. 



Read 3^; width ot head 45 ; depth 9, D. I, 7; P. I, 10; A. IV, 14. Gill 

 rakers (5 + 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 i length of head. Head fiat, very broad, its 

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

 smooth anteriorly and granulated posteriorly ; fontanel almost obsolete, 

 wide anteriorly and ending in a short groove posteriorly at a jioint ^ 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)3,^ in head; maxil- 

 lary barbel slender, thick at base, 1* in head ; outer mental barbel reaching 

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

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

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

 forming together a crescent-shaiiediiatch, 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 serraj 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 1 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 



