642 ZOOLOGY— FISHES. 



MEDA FULGIDA, Gir. 



Medafulgicla, Gir., Pioc. Acad. Nat, Soi. Pliila., 1856, 102.— Id,, U. S. & Mex. Bound. 

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

 Id., Rep. Plagop. & Ichthy. Utah, 1874, 5. 



A small species from the Eio 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 ; preniaxillary series complete. 



This genus has the physiognomy of CUnostomus. The presence of 



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



LEPIDOMEDA VITTATA, Cope. 



Plate^XXVI, Figs. 2, 2a. 



Lepidomeda vitlata, Cope, Proc. Am. Phil. Soc. Phila,, 1S74, 131. — Id., Rep. Plagop. & 

 Ichthy. Utah, 1S74, 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 times 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 Plagopterus argentissimus. Thus 



