9^ 
PltOCEEDINd^ OF THE NATIONAL MUSEUM. 
VOL. XXIV. 
ill .shapo, in.scrted Inflow l)ii,sc of third or fourth dorsal ra3\ Pectoral 
rounded; each of the (1 u])i)er rays with 2 long .silky tilaments. Ven- 
trals short, free posteriorly. 
Color in spirits dusky above, lighter underneath, the body eonspic- 
uously marked with broad, light-edged, ])rownish-black lateral rings; 
the first passing through ])ases of iirst, second, and third dorsal spines; 
the second passing on eithei" side of base of last spine; the third, fourth, 
and iifth crossing the base of anal; the sixth on caudal peduncle some 
distance anterior to base of fin; a dark band extending across the 
interor))ital space encroaching a little on the upper surface of the eye; 
below the eye it is continued downward to the lower edge of cheek, 
growing narrowei' and lighter toward the lower end; upper part of 
head with a U-shaped mark, the open ptirt of which is forward, the 
ends touching the middle of posterior edges of the eyes. Bases of 
dorsal and anal tins with large black spots, connected with the body 
rings; spinous dorsal narrowly edged anteriorly with l)lack; pectoral, 
ventral, and caudal tins without distinct markings. 
Living individuals have the dark rings bordered by bright yellow, 
the dorsal and caudaLtins reddish. 
U^'* ^ * 
Fio. 17.— Fterogobius daimio. 
This species is closely related to /*, ehip(>)des< (Giinther). We have 
been al)le to find no great differences betw^^cn the two forms, except in 
color. /-*, daim'io is darker; the dark bands on body are wider than 
those of P. elapoides^ and there is no vertical band on caudal. These 
differences, though slight, are definite and constant in a large number 
of individuals examined by us. 
Our collecting in Japan seems to indicate that 1\ dahn/o is a south- 
ern form, the Bay of Tokyo l)eing somewhere near its northern limit, 
/', cldjxtldi's is found farther to the north, or if extending south is not 
found on tlie shores washed by the warm southerly currents. Our 
specimens are from Misaki, and from Wakanoura, 
Type No, (!4:55, Leland Stanford Junior University Mu.-euin, Local- 
ity. Misaki, Sagami, Japan, 
Described from a male specimen ion mm. in length, 
{Ihduilo^ a feudal lord in Japan). 
