536 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



152. KYPHOSUS LUTESCENS. 



J'imeh'j)teri(s hilcscnis Jordan, Proc. U.S. N.M.lWl, 2l.'9 (J'.raitliwaitc Bay, Socorro 



Island); .Jordan, Hull. U. S. F. C. 1881, :W8. 

 Kyphoaiis lutexceiis Jordan, I'roc. IT. S. N. M. 1885, 380 (Socorro Island, ii<i description). 



Habitat: Kevillagigcdo Archipolngo. 

 Etymology: Lutcsccns, growiiiii yellow. 



This species is known only from the original type taken on Socorro 

 Island and from anotlior taken at Clarion Island by Dr. Gilbert. 



153. KYPHOSUS OCYURUS. 



Pimelepieriis ocyitnis Jordan, Hull. U. S. F. C. 1881, 327, 328 (Bay of Panama) ; Jordan 



& Gilbert, Bnll. U. S. F. C. 1882, 110 (Panama, no de.scrii)tion). 

 Kyphonus ocyunis Jordan, Proc. U. S. N. M. 1885, 380 (Panama, no description). 



Habitat: I'anama. 



Etymology: a>z6?, quick; oopd, tail. 



This species is known only from the original types, from Panama 

 It is a strongly marked species, perliaps the type of a distinct sub- 

 genus or even genus, 8ect(Uor, characterized l)y the little development 

 of the roots of the teeth and by the deeply forked caudal. 



XLIV. MEDIALUNA.* 



Medialuna Jordan & Feslor, (ini. vor. (calif ornicush). 



Type: Scorjiis californiennis Steindachner. 



Etymology: Spanish medialuna — half moon, the vernacular name of 

 the typical species in California. 



This genus contains a single species which belongs to the Californian 

 fauna. Its nearest relative seems to be the Australian genus Atypich- 

 ihys Giinther, which has a different tin formula (D. xi, 15; A, iii, 15) 

 and the middle dorsal spines much longer, about half of head. The 

 two genera are apparently distinct; certainly neither belongs to the 

 Chwtodontidoe. 



" The j^oncra lately subtracted from Scorj)>s (tyi>c S. ycoryianu!^, an Australian 

 species) may be defined as follows: 



o. Anal fin long, 2J in U-n-ftli of body, its rays, III, 25 to 27; dors.al spines gr.ichially increa.sing in 

 lioiglit jiostfriorly ((colli saiil to bo conical, but, probably <'onipi-csso(l). 



I,. Soft dorsal ami anal falcalc. tli<! longest ray U in base of r.ayed part ; dorsal spines SCORPIS. 



bb. Soft dorsal and anal not falcate, tlie longest ray 2J in base of rayed part; dor.sal spiue.s 10. 



CyT.SlOSOMA (Kmip). 



aa. Anal I'm .sbort, its ba.se HJ in lengtli of body, i(s rays 111, 19; dors.al spines gr.adually increasing 

 in lieiglit to tlie sixtb, decreasing poslerioily ; soft dorsal and anal not falcate, the longest ray 

 I J in base of rayed part; i»rc(ipercnliun serrated at angle; (eetli conijiressed, incisor like, but 

 narrow Mkuialuna. 



