LUTIANIDAE. 113 
One specimen, No. 3311, 123 inches long from Rikitea, Manga Reva. 
Head including flap 2.68 in length; depth 2.52; eye 4.85 in head; snout 
2.86; maxillary 2.48; pectoral not reaching front of anal, 1.16 in head; deep 
opercular notch, with opercular knob moderate. 
Rabirubia inermis (Prerers). 
JorDAN, Proc. Cal. Acad. Sci., 1895, ser. 2, 5, p. 457, pl. 39. 
Mesoprion inermis PETERS, Monatsb. K. Akad. Wiss. Berlin, 1869, p. 705. 
Twenty-seven specimens, 213 to 5g inches long from Acapulco, shore. 
M. C. Z. 29444 (10 specimens). 
These specimens show a dusky spot on upper base of pectoral; the upper 
and lower caudal ray pale, the lower paler, almost white; other outer rays of 
caudal with dusky area, wide at base, tapering to the tips of the lobes; a yellow- 
ish band at base of caudal; these colors are most distinct in the smallest speci- 
mens, gradually becoming less distinct in the largest specimens; on each of the 
specimens there is an oblong faint bluish, iridescent, or pearly spot, in most 
specimens extending from posterior angle of soft dorsal downward and forward 
to lateral line, in others lying parallel with and close to the lateral line; some 
specimens have a small spot of similar color on the top of caudal peduncle. 
Xenocys jessiae Jorpan & BouuMan. 
Proc. U.S. Nat. Mus., 1890, 12, p. 160. Snopcrass & Hetier, Proc. Wash. Acad. Sci., 1905, 6, p. 375. 
Five specimens, No. 3249-50, 3264-5, M. C. Z. 29639 and 3278, M. C. Z. 
29711, 62 to 93 inches long from Wreck Bay, Chatham Island. 
Xenichthys xanti Git. 
Proc. Acad. Nat. Sci. Phil., 1863, p. 82. Girpert & Srarxs, Mem. Cal. Acad. Sci., 1904, 4, p. 103. 
Four specimens 53 to 6% inches long from Perico Island, Panama Bay, in 
two fathoms of water. M. C. Z. 29421 (2 specimens). 
This species is easily distinguished from X. agassizii by having a much 
shorter pectoral, and in our specimens, by the presence of very distinct lateral 
stripes, large black spot at base of caudal and in having the ventrals dusky only 
at tip. Xenichthys agassizii has a broad black outer margin to the ventrals. 
Xenichthys agassizii SreINDACHNER. 
Sitzb. Ak. Wiss. Wien, 1875, 72, p. 34. (Beitriige, 3, p. 6.) SNopGrass & Heiter, Proc. Wash. Acad. 
Sci., 1905, 6, p. 376. 
Five specimens, Nos. 3266-70, 62 to 8 inches long, and one specimen (with- 
out tin tag) 4% inches long from Wreck Bay, Chatham Island, Nos. 3269-70, 
M. C. Z. 29644, 29647 (2 specimens). 
