FISHES OK HAWAIIAN ISLANDS. 
93 
in 1835 by Dr. .T. K. Townsend in the Hawaiian Islands, measuring 13.5 inches in length, and 1.5 
inches from tip of snout to gill-opening, or 6 inches to anus. 
Thyrsoidea eurosta Abbott, Proc. Ac. N;it. Sci. Phila. I860, 478, Hawaiian Islands; Gunther, Cat., VIII, 94, 1870 (no 
description). 
Lycodontis eurosta, Fowler, Proc. Ac. Nat. Sci. Phila. 1900, 494, pi. XVIII, fi^. 4 < Abbott’s type). 
47. Gymnothorax laysanus (Steindachner). Elate 12 and Fig. 22. 
Head 2.3 in trunk; tail longer than head by the length of the latter without eye and snout; eye 
1.67 in snout, 1.5 in interorbital space; snout 6 in head; interorbital space 7; mouth 2 and an eye 
diameter in head. 
Body rather deep and compressed; tail tapering at its extremity to a rather sharp point; head 
pointed and compressed; snout pointed, the tip rounded; eye rather small, much nearer corner of 
mouth than tip of snout; mouth horizontal and jaws equal; teeth in jaws biserial, the inner series the 
larger and depressible; vomerine teeth pointed and in a single series; each jaw with some enlarged 
canines in front, which are depressible; anterior nostril in small tube at tip of snout; posterior nostril 
over front of eye above; gill-openings smaller than eye; body more or less smooth; head with few 
pores; origin of dorsal a little nearer corner of mouth than gill-opening; fin around end of tail more 
or less pointed. 
Color in alcohol, dark brown above; belly and lower surface pale; everywhere reticulated, speckled 
or mottled with darker, or blackish brown on upper portions. The above description is from a speci- 
Fig. 22 .—Gymimlhorax laysanus (Steindachner). 
men (No. 04913) 10 inches long, from Honolulu. The species shows considerable variation in color 
and other characters with age. 
Color in life (No. 03357), brown, profusely covered with rather large roundish black spots, 
interspersed among which are more numerous and much smaller white specks, these more or less 
uniformly distributed over the body and fins; edges of dorsal and anal tins darker; tip of caudal 
narrowly edged with white. 
The young may be described as follows, from a specimen 4.5 inches long (No. 04916), taken on 
the reef at Honolulu, August 15, 1901. 
Head 2 in trunk; head and trunk about 1.3 in tail; eye about 1.5 in snout, 1 in interorbital space; 
snout 5 in head; mouth 2 and a little less than an eye diameter in head. 
Body elongate and compressed; head moderately compressed laterally, pointed; neck swollen 
and a little thicker than body; snout short, bluntly rounded, rather deep; eye small, anterior, about 
midway between tip of snout and corner of mouth; mouth large, jaws nearly equal, or snout only 
very slightly protruding and when closed the lips entirely concealing the teeth; teeth in 2 rows along 
