430 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



The species may be at once distinguished from M. peninsidcv and il/. 

 vagrans by the smaller number of dorsal spines and the larger number 

 of anal rays, as well as by the stronger teeth; the teetli are much 

 stronger than those of Menidia notata, the body is deeper, and there are 

 fewer scales in a longitudinal series. From M. boscii of J. & G. it differs 

 in its smaller eye, position of first dorsal, stronger teeth, and fewer scales 

 in the lateral line. 



The head, in shape and squamation, agrees with that of other species; 

 its length is very slightly less than the greatest depth of the body, and 

 is contained from 4^ to 4| times in total length to caudal base (end of 

 silvery band). The eye is a little shorter than snout, equals width of 

 interorbital space, and is two-sevenths as long as the head. The snout 

 is almost one-third as long as the head. Mouth rather large, the strougly 

 curved and freely i^rotractile intermaxillary being as long as the snout. 

 Teeth in narrow bands, the outer series in both jaws much enlarged, a 

 pair of canine-like teeth in the inner series at the symphysis of upper 

 jaw. Lower jaw much longer than eye, as long as second dorsal base, 

 contained 2| times in length of head. Jaws equal. 



The greatest depth of the body equals the distance iii'om origin of first 

 dorsal to end of second dorsal, or nearly so. The origin of spinous dor- 

 sal is midway between tip of snout and end of middle caudal rays, im- 

 mediately above anal origin. Longest dorsal spine one-third as long as 

 head. Longest ray of soft dorsal equals length of head without post- 

 orbital part; it also equals two-thirds of length of pectoral. The ventral 

 is inserted under the ninth scale in a longitudinal series; its length is 

 about one-half that of the head; it does not quite reach the vent. The 

 length of anal base equals twice that of head without postorbital part. 

 The length of middle caudal rays equals one-eighth of total length to end 

 of silvery band; the external rays are about 1^ times as long as the 

 middle rays. Only the caudal fin is scaly, and that for half its length. 



Light olivaceous; minute brown punctulations on the jaws, top of 

 head, and around the posterior margins of the scales of the back. 



D. IV, I, 8; A. I, 22; V. I, 5; P. 1, 12; Scales 8 to 9—39 to 40. .Width 

 of silvery band about two-thirds that of a scale in the series through 

 which it runs, half length of snout, one-sixth length of head. 



17. Tylosurus gladius, n. sp., Bean. 



Ti/Iosurus gladius Beau, iu Goode & Bean, Proc. U. S. N. M., v, 239. Name 

 onlj'. 



The type of the species (Xo. 30151) was taken at Pensacola, Florida, 

 by Mr. Silas Stearns. It is about 29 inches long. 



Body robust, little compressed, its greatest breadth a little more than 

 two-thirds greatest depth ; caudal peduncle slightly depressed, a little 

 broader than deep, with a slight dermal keel. 



Head broad, broader above than below. Interorbital space nearly 

 two-thirds length of post orbital part of head, with a broad, shallow, 

 naked, median groove, which is wider behind and forks at the nape. 



