NO. IL'59. DISCOBOLOUS FISHES OF JAPAN— JORD AX AXD SXl'DER. 349 
Head 3i in length-, depth 4; length of snout 3^ in head; diameter 
of eye Yi: width of interorliital space 3; D. 4-1: ; A. 3-1: : P. 34. 
Bod}" elongate, compressed posteriorly, about as wide as deep ante- 
riorly. Head large, interorbital space broad and flat. Mouth large, 
the maxillar}' extending nearly to middle of e3'e; lower jaw included; 
teeth tricuspid, in oblique rows, forming broad bands on the jaws. 
Anterior nostril with a large tube, the posterior with a low rim. Gill 
opening extending a short distance below upper edge of base of pec- 
toral, its width contained 3 times in head. 
Dorsal and anal tins enveloped in loose skin and gelatinous tissue, 
the anterior rays hidden from view; dorsal inserted a])ove posterior 
edge of ventral disk, its distance from tip of snout about 3 in bodv; 
anal inserted farther back, its distance from snout a])out 2 in bod}"; 
both dorsal and anal joined to the caudal, the tips of the posterior rays 
separated by a shallow notch. Posterior edge of pectoral rounded, 4 
or 5 of the lower rays elongate, their free tips extending beyond margin 
of fin; length of pectoral about 5 in head. Ventral disk nearl}- round, 
with a broad, free border, its diameter contaiiKMl about 2^ times in 
head. 
Skin smooth; distinct pores on upper jaw, no barbels. 
Color in spirits pale brownish with dark markings. The color varies 
considerably; some specimens are almost translucent, the sides with 
dusky clouds, the fins edged with blackish; other individuals have 
irregularly shaped, dark spots on the sides or dusky vertical bands 
beginning near median line and extending to edge of dorsal tin; an 
example from Hakodate has many narrow purple bands extending 
from snout to caudal fin. 
North Pacific; common south to Unalaska on the American side and 
to Myiako in Rikuchu on the Japanese. It is especially abundant 
about rocks around Hakodate Head. Our numerous Japanese speci- 
mens are from Otaru, Hakodate, Aomori, and Myiako. The original 
types were collected by Messrs. Pierce and Smith at Sakhalin. Channel 
of Tartary. 
(Named for Prof. Louis Agassiz.) 
4. CRYSTALLIAS Jordan and Snyder, wewv genus. 
Crifstallia.s Jordan and Sxydek, new genuiJ {uiat^noiJiirmf). 
Allied to Liparh^ differing in the diaphanous body which is strongly 
compressed, and especially in the possession of a number of barbels on 
the jaws. The presence of barbels distinguishes it from Crystallich- 
tJn/x, which it very closely resembles. 
(KftvffTaXXog, crystal.) 
