| OCR Text |
Show 524 MR. G. A. BOULENGER ON FISHES [June 18, 2. GEOPHAGUS DUODECIMSPINOSUS, sp. n. Depth of body If in total length, length of head 3 times. Eye nearer gill-opening than end of snout, its diameter 3 | times in length of head and a little less than interorbital width ; praeorbital lj diameter of eye ; scales on cheek small, in 7 series. Dorsal XII 14; spines increasing in length to the fourth, which is | length of head; soft portion scaly at the base, longest rays nearly as long as head. Pectoral a little longer than head. Ventral shorter, reaching anal. Anal III 9 ; third spine longest, as long as third dorsal. Caudal truncate. Scales 30 ^; lat. 1. j. Yellowish, with a dark vertical streak below the eye, and a dark round spot on the side below the lateral line; vertical fins brownish, with some small, round, white spots on the soft dorsal and anal; pectorals white, ventrals blackish. Total length 90 millim. A single specimen from Paraguay. 3. EUANEMUS NIGRIPINNIS, sp. U. Depth of body equal to length of head, 4| to 5 times in total length; width of head equal to length without snout; groove extending from end of snout to occipital bone; eye as long as snout, 3 | times in length of head, half interorbital width ; maxillary barbel extending nearly to end. of pectoral spine, mandibular barbels to a little beyond base of pectoral spine. Humeral process covered with skin, § length of pectoral spine. Dorsal I 6; spine serrated behind, as long as head. Pectoral spine a little shorter than head. Ventral as long as pectoral, reaching a little beyond origin of anal. Anal 36-37. Caudal deeply notched. Upper surface of head, back, and a lateral stripe dark grey, rest white ; pectorals and ventrals deep black, white at the base ; caudal black at the base. Total length 190 millim. Four specimens from Paraguay. 4. OXYDORAS EIGENMANNI, sp. n. Both jaws with small teeth. Depth of body equal to length of head, 4 times in total length. Posterior nostril nearer the eye than to tbe anterior nostril; diameter of eye 4 times in length of head, 1| in interorbital width, 1| in length of snout; bases of the six barbels united by the fold of the lower jaw; maxillary barbels with smaller tentacles at the base, extending a little beyond base of pectoral spine, twice as long as mandibulars. Gill-cleft extending to below posterior border of eye. Humeral process striated, half as long as pectoral spine. Pectoral spine a little longer than the head. Dorsal I 6; spine a little shorter than the head, very strongly serrated in front, very feebly behind. Adipose fin a little shorter than base of anal. N o shields between the dorsal fins. Lateral shields moderate, third vertical diameter equal to the eye, serrated behind, 26 or 27- Caudal bifurcate, |
