32S EXPEDITIOX OF THE "ALBATROSS," 1S99-1900. 



pine Archipelago (Bull. U. S. Bur. Fish., 27, ]>. 284), in having one more anal 

 ray. 



The following male specimens are in the collection (formerly called n'ru- 

 latus), Nos. 05900, Sf inches antl 05904, three specimens 28 to 58 inches from 

 Makemo, Paumotu Islands. 



The last three specimens each have dor.sal XIII, 20; anal 24. Nos. 05911, 

 M. C. Z. 29516, four specimens 2 to 21 inches long from Makemo, and 05901, 

 M. C. Z. 29382, 4i inches long from Rangiroa, Paumotu Islands. 



The largest specimen among No. 05904 gives the following: head 4.41 in 

 body; dei)th4.07; eye 4. 30 in head; longest dorsal spine 1.41 ; longest ray 1.25; 

 longest anal ray l.liO; dorsal XII, 20; anal 22. Soft dorsal attached to caudal 

 for about ? of its length; caudal slightly rounded; front of head almost per- 

 pendicular; slightly rounded; crest present; supraorbital tentacle bifid; a 

 single row of cardiform teeth in each jaw; no canines present, anterior nostril 

 with short tube having a fringe of cirri on its posterior border. 



In spirits this specimen is much lighter than the other specimens though 

 similarly but more faintly marked on body; soft dorsal dusky in front, lighter 

 behintl, showing very slight traces of the lighter bars. The fin is also very light 

 colored with a broad dusky margin showing slight traces of oblique bars; anal 

 light colored, also showing slight traces of bars and with narrow dusky margin 

 on membrane; caudal has a broatl faintly dusky margin and faint dusky bar 

 about middle. 



The differences formerly separating »S. edentulus and S. rivulatus were the 

 presence of an occipital crest in S. rivulatus, and differences in coloration. These 

 are, however, merely sexual characters. In the fishes of Samoa Jordan & Seale 

 record seventy-five specimens of tS'. rivulatus and sixty of S. txlcntulus from .\]Ma 

 and Pago Pago. An examination of thiity-seveii of these shows that of twenty- 

 four specimens identified as S. rivulatus all l)ut one of the mature specimens 

 are males, and this one lacked the crest and had the coloration of the S. edentulus 

 form. Of the thirteen s]iccimens identified as S. edentulus all were females 

 except one, and this one had a crest and the coloration of the S. rivulatus form. 

 All of our specimens show the same differences and Icuxc no doubt but that the 

 two species are identical. 



