PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 433 



19. Cyprinodon mydrus, n. sp. 



Two specimens, No. 30479, were collected by Silas Stearus, atPensa- 

 cola, Florida. This species is most closely related to C. gibbosus Baird & 

 Girard, from which it is distinguished by its much larger eye (the diam- 

 eter of which is considerably greater than the length of the operculuDi, 

 to which in G. gibbosus it is equal) ; by the greater number of dorsal rays, 

 of which there are 13; by the smaller number of its anal rays, of which 

 there are 29; by the smaller number of its scales, which in the lateral line 

 is 24; by the smaller number of scales iu the transverse line, 9 in num- 

 ber; by the longer tail and the greater size of the ventral fin. 



The color of this species is silvery, the back being olivaceous, and 

 the sides marked \^ith seven or eight indistinct vertical bands. The 

 scales are large, and their outlines are strongly marked, giving to the 

 fish the appearance of a piece of hammered metal work ; hence the spe- 

 cific name, which is derived from fio5pn<;, '< a lump of metal." 



Description. — Body short; similar in shape to females of C. gibbosus. 

 Mouth small, terminal. Premaxillaries very protractile. Humeral scale 

 scarcely as large as the contiguous scales ; one-third as long as the head, 

 and equal to the width of interorbital space. 



Origin of the dorsal midway between the tip of the snout and the 

 root of the caudal. 



Origin of the dorsal and ventrals equidistant from the tip of snout. 

 Dorsal fin, when depressed, not extending to the caudal. The longest 

 dorsal ray equal to length of head without snout. Length of head is 

 contained 3 times in the standard body length. Height of body is con- 

 tained 2^ times in the same length. 



20. Zygonectes craticula, n. sp. 



The types of this species, 'No. 31439, were obtained in a small branch 

 of Elbow Creek, a tributary of Indian River, in East Florida, by Dr. 

 J. A. Henshall, of Cynthiaua, Kentucky, and a second lot, ^No. 28500, 

 were obtained in July and August, 1880, at Nashville, Georgia, by Mr. 

 W. J. Taylor. The relations of this beautiful species are with that de- 

 scribed by Agassiz under the name Z.dispar. 



Body stout, moderately compressed, especially posteriorly; head 

 moderately broad and flattened above. Interorbital space flat, its 

 width less than half the length of the head and 1^ times the diameter 

 of the eye. The distance between the eyes above is greater than below. 

 Snout rather obtuse, its length equal to that of the eye. The total 

 length of the head is contained 3^ times in the standard length and 4i 

 times in the total length of the body. Teeth in narrow bands, the 

 outer series in both jaws enlarged and somewhat recurved. Scales 

 moderate ; 36 in lateral line, 10 in transverse series. 



Fins small ; dorsal smaller than anal, and inserted over the 20th 

 scale in the longitudinal series, and slightly behind the anal insertion ; 

 somewhat nearer to the end of the tail than to the tip of the snout. 

 Proc. Nat. Mus. 82 28 Sei>t. S», 1 88S. 



