Jordan and Everniann. — Fishes of North America. 2237 



Oobiiis dolichoeephalus, Cope, Trans. Amer. Pliilos. Soc. Phila. 1869, 403, near Orizaba, 



Mexico. 

 Euctenogohius latus, O'Shaughxessy, Ann. Mag. Nat. Hist., Series 4, xv, 1875, 146, Bahia. 



(Coll. Dr. Wucherer.) 

 Chonophorus taiasica, Jordan & Eigenmann, I. c, 500. 



2566. AWAOUS MEXICANUS (Giinther). 



Head 4; depth 6? ; eye 8. D. VI-11; A. 11; scales 76 to 82, 24 between 

 second dorsal and anal. Head as broad as deep, flat above, snout elon- 

 gate, upper profile oblique; mouth horizontal, lower jaw included, max- 

 illary reaching to below anterior margin of eye. Teeth of the outer 

 series enlarged; no canine teeth. Scales ctenoid, those on nape and 

 anterior part of body very small; head naked. Dorsal fins lower than 

 depth of body, none of the spines produced; caudal rounded, Tin length 

 of body. Yellowish olive; back and sides reticulated with blackish; 

 head, dorsal, caudal, and pectoral fins dotted with blackish, the spots 

 forming streaks on second dorsal; 6 cross series of dots on caudal; 

 an irregular, small blackish spot on the upper part of the base of the pec- 

 toral. (Giinther.) Fresh-water streams of the eastern slope of Mexico; 

 known to us only from Dr. Giinther's description. 



Oobius mexicanus, Gunther, Cat., in, 61, 1861, Mexico. 

 Chronophorus mexieanui, Jordan & Eigenmann, I. c, 501. 



8i6. BOLLMANNIA, Jordan. 



Bolhnannia, Jordan, Proc. TJ. S.Nat. Mns. 1889, 164 (elClamydes). 



This genius differs from LepidogoMus by having no fleshy processes on 

 inner edge of shoulder girdle, the interorbital area of skull narrower and 

 without trace of median keel, and by very large ctenoid scales. From 

 Gobiiis proper it is distinguished by the presence of 7 dorsal spines and by 

 the presence of large scales on the cheeks. Species inhabiting the depths 

 of the Pacific; not found in shoal waters as is the case with most other 

 gobies. ("I have named this species in honor of my late colleague, Mr. 

 Charles Harvey Bollinan, whose untimely death, while engaged in the 

 exploration of the rivers of Georgia, took place while this paper was pass- 

 ing through the press." — Jordan.) 



a. * A con.spicuous black spot on posterior portion of spinous dorsal. Body deep, the 

 least depth of caudal peduncle greater than diameter of orbit. 

 6. Filamentous dorsal spines very long, reaching beyond middle of soft donsal 

 when depressed. Lower caudal rays black; dor.sal spot conspicuously 

 ocellated. Eye large, 3 to 3^^ in head. ocellata, 2567. 



bb. Filamentous dorsal spines shorter. Lower caudal rays not black, and dorsal 

 spot not ocellated. Eye smaller, 3J to 4 in head. chlamydes, 2568. 



aa. No black spi)t on spinous dorsal. Body slender, the depth J the length. Least 

 depth of caudal peduncle not greater than diameter of orliit. 

 c. Head large, 3 to 3J in length. No black spot at base of caudal. Fins low. 



macropoma, 2569. 

 cc. Head smaller, 3^ in length. A black spot at base of caudal. Fins higher. 



stigmatura, 2570. 



* This analysis of species is taken from Gilbert, Proc. U. S. Nat. Mua. 1891, 555. 



