Additional Notes on the Holconoti. 367 
at an earlier period, for among several specimens caught in July, 
only one was full of young, and that was a younger specimen. 
The body is dark olive above ; sides with alternate silver-gray 
and rusty bands; fins brown. In younger specimens the longi- 
tudinal bands are more yellow, and the fins also yellowish. 
Ruacocuitus, Agass.—In this genus the vertical fins have the 
same structure as in Embiotoca and the sexes differ in the same 
manner ; but the jaws are very protractile, almost as in our south- 
eri Paxhnolainitis and the lips very fleshy, the lower lip especially 
broad, lobed and have their outer margin free from the jaw bone 
all. round, and not attached by a frenum to the chin, as in Embi- 
_ otoca and Amphistichus. Teeth few and only in front of the 
jaws, and none on the sides. ‘The body is also more elongated. 
The young differ widely from those of the preceding genns : 
their form is more elongated, the caudal remarkably large and 
long and truncate at its extremity, whilst it is forked in Embi- 
otoca : and the extremities of the dorsal and anal aie beyond 
the base of the ca audal, whilst in Embiotoca the not even 
Teach it; finally there is no black speck upon ph Sed the dorsal 
Rhacochilus toxotes, Agass.—Color uniform olive above ; sides 
silvery with light longitudinal bands; female darker than male; 
vertical fins and ventrals dark; male blackish upon opercule an 
Cheeks. Female with mature young in July. 
Ampuisticuus, Ayass.—The spinous rays of the dorsal shorter 
than the soft rays, but gradually iuecreasing in length, so that the 
soft portion of the fin does not rise abruptly higher than the 
Spinous portion, though the anterior soft Aes sare the longest of the 
i. Articulated rays of the anal all divided, and not simple i in front 
48 in Embiotoca, nevertheless the fin is separated into an anterior 
and a posterior portion, by the introduction in the male of a short 
flat-triangular ray, which produces a deep emargination in the 
outline of the fin, and in the female by the presence of two or 
Aree articulated rays of equal length with the others but much 
stouter and oftener divided. In the male the anterior rays are 
Swollen as in Embiotoca and Rhacochilus. Papilla of the males 
Young have not been observed, the specimens obtained having 
been ¢ caught in January. 
Amphistichus argenteus, Agass.—Bluish gray above, sides sil- 
very with occasional indistinct and irregular transverse bands of 
live color. Vertical fius yellowish. 
_ Hotconotus, Agass.—Dorsal long, and lowest behind, its si. 
nous rays being the longest; the anterior and posterior honed 
