j^o PAPERS FROM TORTUGAS LABORATORY vol. xxxiv 



shading into pale silvery on lower part of side; a black vertical ocular band about 

 three-fourths diameter of eye above and scarcely wider than pupil below eye, 

 with a pale border both anteriorly and posteriorly above eye; a broad dark band 

 across body at and behind end of dorsal and anal bases, broadly expanded on 

 dorsal, but narrow on anal; soft dorsal with a submarginal dark line, and about 

 six or seven lines a little darker than ground color, on upper part of side under 

 spinous dorsal; dorsal and anal brownish at base and paler distally; caudal, ven- 

 trals, and pectorals pale straw color. 



A note on the color of a fresh specimen by Dr. Longley states that the borders 

 of the ocular band were sulphur yellow, and the dorsal and anal, exclusive of 

 narrow white margins, were yellow distally. 



The following enumerations are based on 2 specimens: D. XIII,2^, XIII,23; 

 A. 111,19, HI,i9; P- : 4> T 5' sca l e s along middle of side 40, 40. Depth about 1.6 

 to 1.9. 



Apparently previously reported only from the West Indies. S. F. H. 



Chaetodon aya Jordan 



Two records of its capture were found among Dr. Longley's notes, 2 speci- 

 mens, 90 and 102 mm. long, having been taken in 39 fathoms, and 5 more, 41 to 

 85 mm. long, in 40 fathoms. There are 8 specimens, however, 27 to 98 mm. long, 

 in the collection, showing that it probably was taken a third time, of which no 

 record seems to have been made in the field notes. 



The specimens were compared with one in the U. S. National Museum (no. 

 37747), supposedly the type, with which they seem to agree perfectly. 



General color of preserved specimens slightly brownish above lateral line, this 

 color shading into silvery below lateral line; two conspicuous black bars present, 

 the first extending from origin of dorsal (sometimes encroaching on the anterior 

 sp'nes), through eye, to end of maxillary, being much wider above eye than 

 below it, this band now, as in life, with a pale margin on both sides; second bar 

 running obliquely downward and backward from under middle of spinous 

 dorsal to middle of base of anal, also with pale borders; bases of dorsal and anal 

 brownish, the rest of these fins, as well as the other fins, plain translucent. In the 

 fresh material Dr. Longley described some of the fins as follows: "There is con- 

 siderable yellow on the outer parts of the spinous dorsal, which becomes a sharp 

 line along the outer margin of the scaly sheath, which extends only halfway up. 

 Remainder transparent. Ventrals are yellow, except spine, which is white. Pos- 

 terior half of anal yellow. Caudal same, tending toward transparency distally." 



This species has a rather produced snout, and a concave anterior dorsal profile, 

 wherein it differs from the other local species of the genus. This species seems 

 rather intermediate of Chaetodon and Prognathodes, but may remain with 

 Chaetodon until further revisional studies are made. 



The following enumerations and measurements are based on Tortugas speci- 

 mens: D. XIII(once XIV in 8 specimens counted), 18 to 20; A. Ill, 15 to 17; P. 13 

 or 14. Head (2 specimens, 32 and 89 mm., measured) 2.7 to 3.0; depth 1.6 to 1.8; 

 longest dorsal spine 2.4 to 2.6. Eye in head 2.9 to 3.0; snout 2.4 to 3.0 (apparently 



