ja$ PAPERS FROM TORTUGAS LABORATORY vol. xxxiv 



sionally showing in addition a distinct humeral band, which appears regularly 

 in the young. I have seen adults display it in a pail of water, and under natural 

 conditions over dark, muddy bottom. The same mark appears at night in asso- 

 ciation with two dark stripes running back from it horizontally above and below 

 the ocellus to meet a third stripe on the dorsal fin. The ocular stripe is sometimes 

 almost black; sometimes pale olive of the exact shade of the head. It is darkest 

 when the fish is feeding low down or in a shadow; lightest when highest up, or 

 swimming rapidly over comparatively long distances. The ocular band is an 

 interesting marking illustrated in detail in plate 20, figure 3. It differs in no 

 significant respect from the corresponding marking of C. ocellatus, to which 

 reference is made at length below. 



As is suggested above, the young differ decidedly in appearance from the 

 adults. Indeed, before the life history was known, the young were named 

 C. bricei. They have a supernumerary humeral band, and a broad dusky area 

 covering the soft dorsal and the body below, which includes the persistent ocellus 

 of the adult and a smaller ephemeral one on the fin above it. W. H. L. 



The collection contains 2 specimens, 39 and 68 mm. long. The rows of scales 

 are arranged as in striatus, that is, those on upper half of side run upward and 

 backward and those on lower half run downward and backward. However, 

 capistratus has 13 dorsal spines, whereas striatus has only 12. Furthermore, the 

 first-mentioned species has a persistent ocellus on the body under the posterior 

 part of the dorsal fin, which is missing in striatus. The last-mentioned species, 

 when young, also has an ocellus, but it is situated on the anterior rays of the soft 

 dorsal. 



Atlantic coast of Panama, Trinidad, West Indies, and sometimes northward to 

 Cape Cod. S. F. H. 



Chaetodon striatus Linnaeus 



Chaetodon striatus Linnaeus, Syst. nat., 10th ed., 1758, p. 275 — "India." 

 Chaetodon consuelae Mowbray, in Borodin, Bull. Vanderbilt Ocean. Mus., vol. 1, art. 1, 

 1928, p. 23, pi. 4, fig. 2 — Cay Sal Banks, Bahamas, in 8 fathoms. 



With the exception of Chaetodon sedentarius, this is the least common species 

 of the genus in shallow water. Its preferred habitat seems to be bottom strewn 

 with eroded corals only sparsely covered with algae. 



Like many other Chaetodons, it has a dark ocular band, faintly margined with 

 light color, not continued ventrally below opercular cleft; two broad brown 

 bands, convex anteriorly, crossing body and vertical fins, the foremost meeting 

 its fellow before vent, which is unusual, as such bands generally fade out before 

 reaching the mid-line below; a third band, concave anteriorly, crossing base of 

 caudal peduncle, fusing on dorsal and anal fins with preceding band. Young 

 about 50 mm. in length with a well-developed ocellus on dorsal fin in the third 

 band, disappearing in the adult; soft dorsal, anal, and caudal with a series of 

 brown, blue, and yellow lines within their transparent margins. 



Atlantic coast of tropical America, ranging northward to Florida and the 

 Bahamas. W. H. L. 



