1919.1 NATURAL SCIENCES OF PHILADELPHIA. 125 



A NEW SILUROID FISH OF THE GENUS CYCLOPIUM FROM COLOMBIA 



BY HENRY W. FOWLER 

 Cyclopium mariae new species. 



Head 4^; depth 6i; D. I, 6; A. I, 6; P. I, 10; V. I, 4;'snout l|in 

 head; mouth width 2|; interorbital 51; least depth of caudal peduncle 

 2|; caudal 1; pectoral 1; ventral ItV- 



Body elongate, rather slender in profile, broadly depressed an- 

 teriorly, deepest at dorsal origin. Caudal peduncle well compressed, 

 elongate, or least depth about If its length. 



Head broadly depressed, width about 3 times that of body at 

 dorsal origin,, rather convex above and flattened below. Snout 

 broad, surface slightly convex, and as seen from above nearly twice 

 as broad as long. Eyes very small, superior entirelj^, front edge 

 about midway in head length, without distinct eyelids. Mouth 

 broad, slightly crescentic, and end of mandible about first fifth in 

 snout length. Buccal disk wide, that of lower jaw 3 times as wide 

 as upper, its hind edge with slight median emargination, and sur- 

 face rather coarsely papillose. Lateral barbel begins about midway 

 in snout length, and extends back nearly to gill-opening. About 

 8 simple conic, rather large teeth each side of upper jaw, and inside 

 forming rather broad band 3 or 4 rows of similarly large bifid teeth. 

 Lower jaw with 3 rows of bifid teeth, about 6 along outer edge of 

 each mandibular ramus, and innermost row of much smaller bifid 

 teeth or about 12 on each ramus. Nostrils about wide apart as 

 eye, rather large simple pores and each with broad cutaneous fold 

 behind. Both internasal and interorbital spaces level. Each cheek 

 with swollen appearance below eye. 



Gill-opening lateral, scarcely extends below pectoral base and 

 forward only about half way in postocular. A simple or rudimentary 

 little gill-raker on first arch and only about 4 short simple points 

 or tubercles on second and third arches, and six on last arch. Gill- 

 filaments about twice eye diameter. 



Enlarged rays of fins all with very small denticles on their outer 

 surfaces or edges. Basal portions of upper faces of pectoral rays 

 with spinules. Upper surface of head and predorsal with very small 

 and slightly scattered papillae, which become more minute and 

 crowded at dorsal base and finally obsoletely minute on rest of trunk. 



