152 Bulletin American Museum of Natural History. [Vol. XXXV 



Esocid.e. Needle Fishes. 

 Tylosurus fodiator Jordan and Gilbert. 

 Cape San Lucas, March 24, four specimens taken in the seine. 



Tylosurus pterurus sp. nov. 

 Fig. 6. 



Head 3; depth 1.4 in postorbital part of head; eye Large 1.7 in postorbita! part 

 of head; snout 3.7 times postorbital part of head, base of upper jaw depressed, the 

 maxillary entirely concealed under preorbital; top of head with a shallow scaly 

 groove. Teeth very small, conical, not compressed, and very even for this genus, 

 about 60 in main row on one side of upper jaw. Pectoral .8 in postorbital part of 

 head; ventrals inserted midway between pectorals and caudal; anal rays 16, inserted 

 distinctly in advance of the shorter dorsal which lias 13 rays; distance of insertion 

 of dorsal to upper caudal lobe contained 3 times in its distance behind preoperele; 

 caudal deeply lunate, the lower lobe longer. Scales large, about 1S5 in lateral line, 

 102 between nape and origin of dorsal. 



Caudal peduncle much depressed, its width slightly more than twice its depth; 

 laterally forming a thin scaled keel-like expansion above the axis of the body. The 

 lateral line very low throughout; beginning on the throat, it sends a vertical branch 

 to the base of the pectoral, curves upward to avoid the base of the pelvic fin and pos- 

 teriorly extends along the base of the peduncular keel midway between the margin 

 of this keel and the mid-ventral line of the body. 



Color in spirits, above green, becoming abruptly white on a level with the top of 

 the eve; mid-line of back, edging of dorsal scales and portions of to)) of head and snout 

 more or less dusky; dorsal, ventrals and upper caudal Lobe somewhat dusky, other 

 tins pale. 



Type Xo. 5202, American Museum of Natural History. Carmen Island. April 3 

 1 specimen, 15 inches long. 



Hemirhamphid.e. Half Beaks. 



Hyporhamphus roberti (Cuvier and Valenciennes). Common Half- 

 beak. 



South end of Magdalena Bay, March 20; Port San Bartholome, March 

 14; Pichilinque Bay, March 27; Carmen 1., April 3; fifteen miles below 

 the head of Concepcion Bay, April 7, and Ceralbo I., April 19. Numerous 

 specimens were taken chiefly with the seine. 



Hyporhamphus rosae (Jordan and Gilbert). 

 Magdalena Bay, March 21, one young specimen seined. 



