20G CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 

 1.25. S1YPC3A1L93IEDI2I7S c ..... V. 



le, I'm.-. 1'. S. Nat. MM-. L880, iii, -I-:'.: type//". oW;,7/. MLS (ioodr.) 



Doily sub-terete, covered with adherent rough-pectinate or ctenoid 



sc..les. .Mouth ralh'.-r lir-'e, the maxillary reaching to beyond front of 

 orbit ; lov.vr ja\v projecting. 'iVetli on jaws, small, sharp; tongue 

 smooth. Dorsal in front of ventrals. Otherwise, essentially as in Ar<jc>i- 

 t lint.. Deep sea. ( : '<ca).<>:, under the sea; i'> ')/"<?, d \veller.) 



485. CI. fSj:i3y!>eaiis Gooile. 



Grayish, mottled with brown; scales metallic silvery. Body plump, 

 terete. Maxillary broad and ilattened posteriorly, extending to front 

 of pupil, its length 2;[ in head. Interorbital space broad, 4 times the 

 diameter <:f eye. Scales arranged in regular transverse rows, overlap- 

 ping in sach a manner as to resemble oblique plates on the sides. Lat- 

 eral line prominent, straight. Insertion of dorsal midway between pee- 

 torals and ventrals, or snout and adipose tin; pectorals long; ventrals 

 under middle of dorsal; caudal forked. Head 4; depth 4. D. 11; A. 

 8; P. 17 or IS; V. or 10; Lat. 1. 52. Deep sea, off the coast of llhode 

 Island. 



(Goudu, Proc. U. S. Nat. Mus. 1880, 1<1.) 



146. COUEGOXUS Liimaius. 



White-fish. 



(Artcili; Liiiii;:-iis, Sysl. X:i!.: ty|>r CorcgontlS IdverettlS Ij.) 



Body oblong or elongate, compressed. Head more or less conic, com- 

 pressed, the, form of the snout varying eonsidei-ably. Month small, the. 

 maxillary short, not extendin-' beyond the orbit, with a well-developed 

 .supplemental bone. Teeth extremely minute, if present. Scales laod- 

 eraie. ! iiiu, cycloid, rat her h'rm. Dorsal tin moderate; caudal tin deeply 

 for!ve<l; anal I'm somewhat elon-aie; ventrals well developed. P.M-ndo- 

 brain Iii;:- l.ir-c. dill-rakers varying from .- hurt and thicUish to very 

 Ion- aad .slender. Air-'ola'.lder very lar.u'e. Stomach horseshoe -shaped, 

 with many (about !(!;>) pyloric cu-ca. Ova small. Species about !<. in- 

 habiliii- the clear lakes of Northern l-airope, Asia, and America, in 

 Arc,], iv-ions descend i 11;;' to the sea. Most of them spawn in late fall 

 or v. inter near the shore, at other seasons often frcquentm*; consider- 

 able depths. The .uioup, as here defined, includes a number of sect ions 

 characteri/.ed by minor modifications of .structure, some of which have. 

 been considered a genera. It seems to us that the number of distinct 

 species has been overest imat ed by previous writers, and that the tfCO- 

 range of each one is much wider than Las hitherto been 



