52 CALIFORNIA ACADEMY OF SCIENCES 



3| times in rest of head." This last doubtless should read postorbital part of head. 

 The eye in our specimen is contained 4^ to nearly 5 tirties in head without upper 

 jaw. The description states that the anterior dorsal rays are " as long as from eye 

 to edge of opercle." This should read to edge of preopercle or to anterior edge 

 of opercle. 



The lateral band tapers to a point at each end. It is nearly confined to the 

 posterior third of the body, and does not reach to the caudal rays. In the large speci- 

 men it is dusk}^ silvery and has ill-defined edges, while in the small ones it is well 

 defined and bright silvery. It is bordered above with a dark streak, very conspicuous 

 in the younger specimens, but diffused and only slightly darker than the body in the 

 large specimen. 



98. Tylosurus stolzmanni (Steindachner). 



Two specimens were taken, 51 and G2 cm. in entire length. Besides these we 

 have in the Museum of Stanford University a sjiecimen from Mazatlan of about the 

 size of our smaller specimen. These are larger than the type (477 mm. in length), 

 from the description of which they differ in some minor resjiects. 



In our specimens the body is as broad as high at the region of the ventrals. 

 The interorbital space is a little wider than diameter of eye, which is contained 12 

 times in length of head. The anal base is a little longer than the dorsal base. The 

 insertion of the ventrals is nearer the caudal base than the posterior border of the 

 eye by from 1 (in the larger sj^ecimen) to 3 times the diameter of the eye. 



This is probably the species recorded by Boulenger (1899, p. 2) from the Gulf 

 of Panama, under the name Belone truncata. 



99. Tylosurus fodiator Jordan <ii Gilbert. 



Not uncommon at Panama. Like other gars, it is called Aguja by the native 

 fishermen. 



100. Tylosurus pacificus {Steindachner). 



Three specimens were collected, which agree very well with the description 

 of the type. 



Family HEMIRHAMPHID.E. 



101. Hyporhamphus unifasciatus {Ranzunl). 



Two specimens collected at Panama by Captain J. M. Dow Iwive been identified 

 by Jordan and Gilbert (1882 i, p. 373) with the short-nosed half-beak, II. j^oeyi 

 ( = H. unifasciatus) . The species is also recorded from Panama by Jordan & 

 Bollman (1889, p. 180). 



