1592 Bulletin ^y, United States Natio)ial Museiun. 



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 ou 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 Sociorro Island. A second and 

 larger example, 134^ inches long, taken by the Alhntross at Charles Island 

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

 species is the Pacific representative of Iridio radi((iiis. Other specimens 

 have been since obtained at the Kevillagigedos by Dr. (Jilbert. (Named 

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



Platyglossxhs nicholsi, Jordan & Gilbert, Proc. U. S. Nat. Mus. 1881, 231, Braithwaite 

 Bay, Socorro Island (Type, No. 28218. Coll. Nichols) ; Jordan &, Hughes, Proc. TJ. S. 

 Nat. Mus. 1886, 61. 



Halichmres nicholsi, Jordan, Review Labroid Fishes, 642, 1890. 



1997. IRIDIO SELLIFER (Gilbert). 



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

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

 fi series, not crossing the median line; no scaly sheatlis 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.) Eevillagigedos 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.) 



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

 tross); Jordan, Review Labroid Fishes, 642. 



1998. IRIDIO SEMICINCTUS (Ayres). 



(Kelp-fish ; Senorita.) 



Head 3^; depth 3^. D.IX, 12; A. Ill, 12; eyeTinhead; snout3; 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 



