642 ZOOLOGY FISHES. 



MED A FULGIDA, Gir. 



Medafulglda, GIR., Proc. Acad. Nat. Sci. Phila,, 1856, 192. Id., U. S. & Mcx. Bouud. 

 Surv., Ichthyology, 50. COPE, Proc. Am. Phil. Soc. Phila., 1874, 131. 

 Id., Kep. Plugop. & Ichthy. Utah. 1874, 5. 



A small species from the Rio San Pedro, a tributary of the Gila, in 

 Southern Arizona. 



LEPIDOMEDA, Cope. 



Lepidomeda, COPE, Proc. Am. Phil. Soc. Phila., 1874, 131. Id, Rep. Plagop. & Ichthy. 

 Utah, 1874, 5. 



Dorsal fin originating behind the line of the ventrals, which adhere to 

 the belly by the inner ray ; body scaled, lateral line present ; pharyngeal 

 teeth 4-4 in the inner row ; no barbels ; premaxillary series complete. 



This genus has the physiognomy of Clinostomus. The presence of 

 scales distinguishes it from Mcda. The spinous rays are not articulated. 



LEPIDOMEDA VITTATA, Cope. 

 PLATE XXVI, FIGS. 2, 2a. 



Lcpidomeda vittata, COPE, Proc. Am. Phil. Soc. PLila., 1874, 131. Id., Eep. Plagop. & 

 Ichthy. Utah, 1874, 5. 



Form moderately stout ; the greatest depth (at the first dorsal ray) 

 entering the length to the basis of the caudal fin four and a quarter to a 

 third times. The head is wide and flat above, with decurved pterotics, 

 and slightly depressed behind the interorbital region ; muzzle obtusely 

 descending, not prominent; mouth terminal and descending to a point 

 below the anterior line of the pupil. Length of head 3.75 tunes in total 

 length to basis of caudal fin; orbit round, 3.75 times in length of head, and 

 1.3 times in interorbital width. The latter is not uniform, but the middle 

 plane is elevated a little above the superciliary ridges, and separated from 

 them by a shallow groove. Nares sublateral. Teeth 2.4-4.2. Preorbital 

 trapezoid. 



Scales small, covering the whole body, except a space behind the pec- 

 toral fin, in twenty-six series above the lateral line, and fifty-six transverse 

 in front of the dorsal fin. Radial formula: D. II. 7; C. 19; A. I. 8; V. 1. VI; 

 P. 15. There are several peculiarities in the constitution of the spines of 

 the fins in which the species differs from Plagoptcrus aryentissimus. Thus 



