206 COXTlilKUTIOXS TO NORTH AMERICAN ICHTHYOLOGY IV. 
1 a;5.— :JYiI*EaA!LO:^^r.DKlLIS Gootle. 
(Giiotli*. I’lDf. U. S. Nut. Mils. 18d0, iii, 4^3: type H. chahibdus Goode.) 
J5()(ly .siib-torctc, covcretl willi adherent ioiij;li-])ectiiiate or ctenoid 
scale.s. idontli rather larj;e, the maxillary reaching to beyond front of 
orbit; lower Jaw iirojecting. Teetli on jaws, small, shari); tongno 
smooth. Dorsal in front of ventrals. Otherwise essentially as in Aryea- 
Deep sea. (uya/o?, under the sea; dweller.) 
•ISo. C5. «‘ii»ajy!!»eaijs Goode. 
Orayisli, mottled with brown; scales metallic silvery. Body plump, 
terete. iMaxillary broad ;ind ilattened posteriorly, extending to front 
of pnpil, its length in head. Interorbital space broad, 4 times the 
iliameter of eye. Scales arranged in regular transverse rows, oveiiap- 
])ing in such a manner as to resemble obliipie plates on the sides. Lat- 
eral line prominent, straight. Insertion of dorsal midway between pec- 
torals and ventrals, or snout and ailipose tin; iiectorals long; ventrals 
under middle of dorsal; caudal forked. Head 4; depth 4. D. 11; A. 
8; 1\ 17 or 18; V. 0 or 10; Lat. 1. 52. Deep sea, off the coast of Bhodo 
Island. 
(Goode, Proc. U. S. Nat. Mus. 1830, 484.) 
I4G. — Linuajus. 
Whitc-Jish. 
(Artcdi; LitiiuBus, Syst. Nat. : type Coregonms hircretiis L.) 
Body oblong or elongate, compressed. Head more or less conic, com- 
pressed, the form of the snout varying considerably. jMoutli small, the 
maxillary short, not extending beyond the orbit, with a well-developed 
supplemental bone. Teeth extremely' minute, if present. Scale.s mod- 
erate, thin, cycloid, rather firm. Dorsal tin moderate; caudal tin deei)ly 
forked; anal tin somewhat elongate; ventrals well developed. Bseudo- 
liraiichim large. Gill-rakers varying from short and thickish to very 
long and slender. Air-bladder very large. Stomach horseshoe-sliai>ed, 
with many (about 100) pyloric cceca. Ova small. Species about 40, in- 
habiting the clear lakes of Xorthern Euro])e, Asia, and xVmerica, in 
xVrctic regions descending to the sea. IMost of them si)awn in late fall 
or winter near the shoiv, at other seasons often frequenting consider- 
able depths. The group, as here detined, includes a number of sections 
charaelerizi'd by minor modifications of structure, some of which have 
been consiilered a;- genera. It semns to us that the numlier of distinct 
species has been overestimated by previous writers, and that the geo- 
graiihical range of each one is much wider thau has hitherto been 
