168 PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



83. Tylosurus notatus (Poey) Jor. & Gilb. "Long- J aw." 



Belone notata Gunther, op. cit., vi, 1866, p. 248. 



32074. Oue specimen. D. 13 ; A. 12. 



84. Tylosurus euryops, n. sp. "Long- Jaw." 



*32073. One specimen. D. i, 15 ; A. i, 17 ; V. I, 5. 



This collection contains OL.e specimen of a species of Tylosurus which 

 appears to be und escribed, and for which, on account of its large eye, 

 we propose the name T. euryops. 



As the result of an injurj- the mandible is imperfect and shorter than 

 the upper jaw. The species is quite similar in general appearance to 

 T. depressus (Poey) ; but the eye is much larger than in that species. 

 It resembles, also, T. truncatus (Poey), but the caudal peduncle is 

 deeper than wide. 



The head to the end of the upper jaw forms one-third of the total 

 length to the end of the caudal fin. The length of the eye is contained 

 5i times in that of the snout, and twice in that of the post-orbital 

 part of the head; it is also equal to the width of the interorbital 

 space. The depth of the head exceeds its width, and is contained about 

 5J times in its length. The length of the pectoral is contained 6 times 

 in the distance from the tip of the upper jaw to the origin of the ven- 

 tral, which is about midway between the nostril cavity and the origin 

 of the middle caudal rays. The length of the ventral is one-half that 

 of the pectoral. The length of the dorsal base equals that of the head 

 without the upper jaw. The longest dorsal ray is about one-half the 

 length of the anal base. The longest anal ray is as long as the post- 

 orbital part of the head. The origin of the dorsal fin is 4 times as far 

 from the extremity of the upper jaw as it is from the origin of the mid- 

 dle caudal rays (at the end of the scales). The origin of the anal fin is 

 slightly in advance of that of the dorsal fin. The lower caudal lobe is 

 somewhat longer than the upper; its length slightly exceeds that of the 

 pectoral fin. The upper caudal lobe is twice as long as the eye. 



85. Tylosurus gladius Bean. " Guakd-Fish." 



Tylosurus gladius Bean, Proc. U. S. Nat. Mus. v, p. 430, Sept. 18, 1882. 



*32077. One specimen. D. 23 ; A. 21. 

 32077. One specimen. 



86. Hemirhamphus balao Le Sueur. " Piper." 



Hemirhamphus hrasiliensis Gunther, op. cit., vi, 1866, p. 270. 



30055. One specimen. 

 *30077. One specimen. 

 *30100. One specimen. 



30115. One specimen. 



87. Synodus fcetens (L. ) Gill. " Mucco Robin." 



Saurus fatens Gunther, op. cit., v, 1864, p. 396, 



*3207C. One specimen. D. 12 ; A. 11 ; scales 7-63-8. 

 32076. One specimen. D. 11 ; A. 11 ; scales 6-62-7. 

 32076. One specimen. D. 11; A. 11; scales 6-62-7. 



