1592 Bulletin 47, United States National Museum. 



dorsal to the space between the ventrals and vent; behind this a pale 

 yellowish bar; head and anterior region with round pale bluish spots, 

 which extend on back and on the dark bar; dorsal bluish at base, yellow- 

 ish above, with regular blue spots ringed with darker; a narrow blue 

 margin along edge of fin ; caudal with obscure round bluish spots ; anal 

 like dorsal; pectorals and ventrals plain. Islands of the west const of 

 tropical America, Kevillagigedos and Galapagos. This species was first 

 described from a single specimen from Socorro Island. A second and 

 larger example, 13| inches long, taken by the Albatross at Charles Island 

 in the Galapagos, shows the life coloration better than the type. This 

 species is the Pacific representative of Iridio radiatns. Other specimens 

 have been since obtained at the Revillagigedos by Dr. Gilbert. (Named 

 for Capt. Henry E. Nichols, U. S. N.) 



Platyglossus nicholsi, JORDAN <fc GILBERT, Proc. U. S. Nat. Mus. 1881, 231, Braithwaite 

 Bay, Socorro Island (Type, No. 28218. Coll. Nichols) ; JORDAN & HUGHES, Proc. TL S. 

 Nat, Mus. 1886, 61. 



Halichceres nicholsi, JORDAN, Review Labroid Fishes, 642, 1890. 



1997. IRIDIO 8ELLIFER (Gilbert). 



Head 3; depth 3. D. IX, 11; A. Ill, 12; maxillary 3 in head; snout 

 2f; eye 3 in 'snout ; lateral line 28. Canines strong; scales on nape in 5 or 

 6 series, not crossing the median line; no scaly sheaths along dorsal and 

 anal ; caudal very slightly emarginate; outer ray of ventrals twice inner 

 ray and reaching vent. General color red; dark cross bar conspicuous 

 from fourth to seventh dorsal spines downward to middle of side ; scales 

 of sides each with a vertical blue line, those anteriorly margined with 

 violet; sides of head with blue lines and spots; dorsal and caudal orange, 

 the former with oblique broken lines of blue, the latter with a few blue 

 spots at base; anal violet, then yellowish, then margined with blue, with 

 a blue median line and broken blue lines at base; other fins pale. (Gil- 

 bert.) Revillagigedos Archipelago. This handsome species is known 

 from a single specimen 11 inches long taken by Dr. Gilbert at Clarion 

 Island. It is closely related to Iridio nicholsi, differing chiefly in its red 

 color, a hue which is rare in the present genus, (sella, saddle ; fero, I bear.) 



Halichceres sellifer, GILBERT, Proc. U. S. Nat. Mus. 1890, 67, Clarion Island (Coll. Alba- 

 tross) ; JORDAN, Review Labroid Fishes, 642. 



1998. IUIDIO SEMICINCTUS (Ayres). 



(KELP-FISH; SENORITA.) 



Head3|; depth 3^. D. IX, 12; A. Ill, 12; eye 7 in head; snout 3; scales 

 3-26-9. Body oblong, compressed, rather elevated at the nape ; lips thick, 

 the lower with a frenum; teeth in about 2 series, 3 or 4 of the anterior in 

 each jaw canine-like; eye small; dorsal spines slender, low, and flexible; 

 scales on breast small; scales before dorsal reduced in size, extending 

 across the median line, and in 10 to 13 rows ; ventrals short, their rays not 

 filamentous; snout rather blunt. Dark greenish brown, with bright 

 reflections; head bronze green above, 3 or 4 narrow, horizontal, wavy blue 



