CilLBERT AND STAUKS — FISHES OF PANAMA HAV 107 



dovii and cfcains, these fins are densely scaled to their tips. 'JMie pectorals are short, 

 not nearly reaching vertical from tips of ventrals, tlieii- length Ij in head. The 

 scales on the hack are in series parallel with the lateral line, hnt lose their regnlarity 

 under the soft dorsal. There are 5i or 6i series between the lateral line and iIr' 

 base of the spinous dorsal, and 10 to 48 scales in the lateral line. 



197. Anisotremus cjesius {JurUan it- Gilbert). 



This species, known hitherto only from tliu types taken at Mazatlan ami one 

 specimen from Acapulco, was found to be abundant among the islands in Panama 

 Bay. It is readily distinguished from its nearest relatives in the Pacific by its uni- 

 form coloration, its longer dorsal iin, and its very long falcirte pectoral. The preorbital 

 is also wider, four-fifths diameter of eye. None of our specimens show trace of dark 

 bars. The description of the ly|>es answers well to ouv specimens, but the maxillary 

 extends to middle of eye, instead of "not quite reaching to front of eye." Of nine 

 specimens examined, all had 12 dorsal spines; there were eight with 16 dorsal rays, 

 one with 15; seven with 10 anal rays, two with 9. The third anal spine is longer 

 than in (hiril or pacijioi, protruding beyond the wide basal sheath for tsvo-fifths 

 length of head. The caudal is much more deeply forked and the upper lobe more 

 decidedly tlu' longci'; the median caudal rays are slightly k'ss than half the upper. 



198. Anisotremus dovii {Giinther). 



Occasionally brought to market. 



The normal fin-formula in this species is: dorsal XI, 14; anal III, !*. We 

 have no specimen with 12 spines, but this variation is to be expected. The soft 

 dorsal varies to 15, but apparently not to lO. The type was described as having 12 

 dorsal spines and 16 rays. The vertical fins are scaled to their tips, but the anterior 

 half of each ray, with a narrow strip of the membrane preceding it, is naked. Where 

 the rays fork distally, they become entirely invested. There are 6i horizontal series 

 of scales between the lateral line and the middle of the spinous dorsal. The pectorals 

 do not extend to opposite tips of ventrals, IJ in head. 



This species is very close to .4. pacijici, but differs in the longer sharper 

 snout, larger dorsal and anal spines, greater scaliness of the fins, the presence of but 

 9 anal rays, and the intenser color of the bands. 



199. Anisotremus interruptus {Gill). 



We have two specimens, one 23 cm., the other 4o cm. long. They throw no 

 additional light on the relation of inlerruplns to its Atlantic representative surina- 

 mensiti. In both specimens, the scales above the anterior portion of the lateral line 

 are conspicuously enlarged, an oi)li<]ue series downward and backward from first dor- 

 sal spine containing but 7 scales. Specimens of surinajnensis have somewhat smaller 

 scales, and are darker in color, esjiecially on the fins. These are slight differences, 

 however, and may well prove inconstant. The species interruptus should be accepted 

 only provisionally. 



