30. CATOSTOMIDiE — MINYTREMA. 135 



tain lights the appearance of pale stripes along the rows of scales; fins 

 dusky, espeeiallj^ at their tips. Rivers of Florida. 

 (Jorduu, Bull. U. S.Nat. Mus. xii, 148, 1878.) 



67.— ITHN^'fl.'KEITIA Jordan. 

 Spotted Siiclcers. 

 (Jordan, Man. Vert. E. U. S. ed. 2, 318: type Catostomus inelanops Raf.) 



Head moderate, rather broad above. Month moderate, inferior, hori- 

 zontal ; the upper lip well developed, freely protractile ; the lower rather 

 small, infolded, /^-shaped in outline, plicate, with 12-20 plica) oq each 

 side. Lower jaw without cartilaginous sheath. Eye moderate, rather 

 high, placed about midway of the head. Suborbital bones consider- 

 ably developed, not very much narrower than the fleshy portion of 

 the cheek below them; the posterior suborbital concavo-convex, about 

 twice as long as deep, sometimes divided ; the anterior somewhat deeper 

 than long, often divided into two, sometimes united with the preorbital, 

 wliich is well developed and much longer than broad. The number and 

 form of these bones, except as to their depth, are not constant in the 

 same species, and do not afford specific characters. Opercular bones 

 well developed, not much rugose. Fontanelle evident, rather large. 

 Gill-rakers rather long, in length about half the diameter of the eye. 

 Isthmus moderate. Pharyngeal bones essentially as in Moxostoma. 

 Body rather elongate, subterete, becoming deep and rather compressed 

 with age. Scales rather large, nearly equal over the body, the radiating 

 furrows not specially marked. Lateral line interrui)ted in the adult, 

 but with perfect tubes, imperfect in partly grown specimens, entirely 

 obsolete in the young. Scales in a longitudinal series 41-47 in number, 

 12-14 in a transverse series from dorsal to ventrals. Dorsal fin rather 

 short and high, with about 12 developed rays, beginning rather nearer 

 the snout than the base of the caudal. Pectoral fins moderate, not 

 reaching ^'entrals, the latter not to vent. Ventrals rather in adv^ance 

 of the middle of the dorsal, their rays normally 9, rarely 8 or 10. Anal 

 fin high and short, often more or less emarginate in males. Caudal fin 

 moderately forked, the lobes about equal. Air-bladder with two cham- 

 bers. Males in spring with the head covered with many small tubercles. 

 One species certainly known.* (//ti-y?, reduced ; r,o?7//a, aperture; in allu- 

 sion to the imperfections of the lateral line.) 



* M. austriimm Beau. Body rather stout, tlio depth 4 in length. Head 4^ in length. 

 Lips plicate, truucato behind. Light brown above, yellowish below; some scales 

 brownisli at base. Paired fins widi dark blotches. D. 11; A. (5; scales G-44-fi. Mi- 

 choacan, Mexico (west of Sierra Madre). This species is probably a Minytrema, but 

 the air-bladder has been removed from the typical specimens. 



{MijxoHtoma austrina Haan, Proc. U. S.Nat. Mus. 1879, 302.) 



