S88 [August, 



D XV. 13. A n. 9. C 3. I. 8. 7. I. 2. V I. 5. P 13. 



Ground color reddish yellow with transverse bars of black. A black spot at 

 the base of the caudal; latter barred. Base of dorsals, anal and ventrals black. 

 Pectorals unicolor. 



Rio Salado, Texas. 



2. BoLEOSo.MA LEPiDA, B. and G. Body compressed, rather thick in the 

 middle and attenuated towards the extremities. The head is continuous with 

 the body, and forms one-fourth of the entire length. The first dorsal, the ven- 

 trals and the anal are quite small compared with the pectorals and second dorsal. 



D IX. 11. A II. 6. C 3. I. 6. 5. I. 2. V I. 5. P 14. 



Ground color reddish, with indistinct transverse blackish bars ; base of the 

 scales black ; belly and fins unicolor. A vertical black spot beneath the eye. 

 Upper tributaries of the Rio Nueces, Texas. 







3. PoMOTis AQuiLENSis, B and G. Resembles P. longuhis in the shape of 

 its body which, however, is proportionally less elongated. The flap of its oper- 

 culum is much more developed, and directed obliquely downwards. The 

 mouth is smaller ; the posterior extremity of the maxillary not extending 

 beyond the vertical line of the anterior rim of the eye. The first dorsal is 

 higher than the second, just the reverse being observable in P. longulus. The 

 tips of the ventrals reach the anterior margin of the anal fin. The caudal is 

 slightly emarginate. 



D X. 11. A III. 10. C 3. T. 8. 7. I. 2. V I. 6. P 12. 



There are twenty-four rows of scales on the deepest portion of the body. 

 The ground color as preserved in alcohol, is uniform reddish brown. The 

 bases of ventrals, anal and dorsal exhibit a large black patch. 

 Eagle Pass, Texas. 



4. CA.T0ST03IUS LATiPiNNis, B. and G. General shape subfusiform; head pro- 

 portionally small, contained five times and a half in the total length. Eyes 

 small, situated near the upper surface of the head; the mouth is small, the 

 lips large and fleshy. All the fins are very much developed and constitute a 

 very prominent feature. The U(per margin of the dorsal is slightly concave; 

 the posterior margin of the caudal, crescent shaped; the anal, ventrals and 

 pectorals are posteriorly rounded or subconical. 



D I. 14. A II. 8. C 5. I. 8. 8. I. 6. V 10. P IS. 



The scales are of medium size, considerably smaller on the back than on the 

 sides and belly. The lateral line runs through the middle of the sides from 

 head to tail. 



The upper part of the body is reddish brown ; the upper part of tail and 

 sides, greenish brown: the belly, yellowish orange; the caudal is olive; the 

 anal, ventrals, and pectorals, show traces of deep orange, especially on their 

 outer margin. 



Rio San Pedro, of the Rio Gila. 



5. Gila. Emoiiyi, B. and G. Body elongated, compressed. Head continuous 

 with the body, gradually tapering from the nape to the snout. Head forming 

 the fifth of the entire length. Mouth almost terminal, thouiih inferior ; the up- 

 per jaw overlappping the lower one of the thickness of the lip. Eyes circular, 

 of medium size. Anterior margin of the dorsal a little nearer to the snout than 

 to the base of the caudal ; anterior margin of the anal nearly opposite to the 

 posterior margin of the dorsal. The caudal fin is deeply forked and slonder. 

 The insertion of the ventrals is in aiivance of the dorsal, but does not extend to 

 the anterior margin of the anal. The pectorals are lanceolated, and do not 

 reach with their extremity to the insertion of ventrals. 



D III. 9. A II. 10. C 8. I. 9. 9. I. 7. V 9. P 14. 



The lateral line makes a slight curve on the sides, being a little nearer to the 

 belly than to the back. 



Collected by Dr. John L. Leconte, near the mouth of the Gila. 



