294 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [70] 
to the nominal genus Huchalarodus based on the males, while Liopsetta 
was based on the smoother females, which were erroneously supposed 
to be scealeless. 
The following analysis gives the supposed differential characters of 
these species, but these characters are of very slight importance, and it 
is probable that the three nominal species are all varieties of Liopsetta 
glacialis. 
ANALYSIS OF SPECIES OF LIOPSETTA. 
a. [Ridge above opercle ending in two obtuse tubercles; scales of blind side smooth, 
those of the eyed side ciliated (probably in males only); interorbital ridge prom- 
inent, acute ; head, 44 in total with seis tte depth, 23. D.,50t057; A., 36 to 41. ] 
(Lilljeborg). . BH ict aton op eet as eee seks _. DVINaNSHA, 84. 
aa. Ridge above eens Hineay rugose, diviaed ‘ean 5 end, ‘but witbour distinct 
tubercles; scales ctenoid on both sides in males, those of the blind side smoother. 
b. Pectoral fin long, about half length of head in the females. two-thirds head in the 
males. Head, 34; depth, 2. D., 55; A., 40; Lat.1., 70. Color, grayish brown, 
mottled with darker; tins eit ieciaes spots. culeaaie. identical with the 
MOXt en sek Loaner acl cece onc UDINE Ss 
bb. Péstaral fin ignore, Apanely Vattdone oth of head even in thé males; head, 4; depth, 
2; D.,56; A., 37 to 42. Vertebrx, 13+-27—40. Color, dark arene the fins spotted: 
. GLACIALIS,* 86. 
2 . 84. LIOPSETTA DVINENSIS. 
Platessa dvinensis “ Lilljeborg, Vet.-Akad. Handl., 1850, p. 360, tab. 20” (mouth of 
River Dwina). Nilsson, ‘‘Skand. Fauna, iv, 617.” 
Pleuronectes dvinensis Gtinther, iv, 442 (copied). 
Habitat.—Arctic coasts of Russia. 
This species is known to us only from the description copied by Giin- 
ther from Lilljeborg. It is apparently a species very closely related to 
Lnopsetia glacialis, and it is most likely identical with the latter. 
85. LIOPSETTA PUTNAMI. 
(THE EEL-BACK FLOUNDER. ) 
[Plate XVI. ] 
Platessa glabra Storer, Proc. Boston Soc. Nat. Hist., p. 180, 1843 (female). Storer, 
Syn. Fish. N. A., p.477, 1846. Storer, Hist. Fish. Mass., 1867, p. 199, pl. xxxi, 
fig. 1. Putnam, Bull. Essex Inst., vi, 1874, p. 12 (not of Rathke, 1837). 
Liopsetta glabra Gill, Proc. Acad. Nat. Sci. Phila., 1864, p. 217. 
Pleuronectes glaber Gill, in Report U. 8. Com. Fish and Fisheries, 1873, p. 794. Goode 
and Bean, Amer. Jour. Sci. and Arts, xiv, 1877, p.476 ; xvii, 1879, p,40. Goode 
and Bean, Proc.U. 8. Nat. Mus., 1873, 347 (Casco Bay, Beverly Bridge, Salem, 
Bucksport, Me.). Jordan and Gilbert, Syn. Fish. N. A., 1882, p. 836. Goode, 
Nat. Hist. Aquat. Anim., 1384, p. 183, pl. 45. 
Luehalavodus putnami Gill, Proc. Acad. Nat. Sci. Phil., 1864, p. 216-221 (Salem, 
Mass.) male. Gill, Report U.S. Com. Fish and Fisheries, 1873, p.794. Goode 
and Bean, Amer. Jour. Arts and Sci., xiv, 1877. 
Habitat.—Atiantie coast of North America, from Cape Cod north- 
ward to Labrador and beyond. 

* The pharyngeals in dvinensis and glacialis have not been examined, 
