Cope.] 490 (June 7, 
is here given for the notes on their habits and places of abode, appended. 
Interest attaches to the fact that the greater part of the fishes are derived 
from the fresh waters of that State, and that species of this genus, like 
those of the other Salmonoid genera, Coregonus and Salmo, are proven to 
have a lacustrine distribution in the northern part of the United States. 
Land-locked Osmeri occur in the lakes of Norway. According to Pro- 
fessor Esmark of Christiana, they are found in Lake Mjosen, which is 500 
feet above the sea, and discharges into it by a stream which has a very 
high fall; also in Nors Vandsjé, near the town of Moss, and in the Stink- 
sild. 
I find three species among our lake smelt, as follows : 
Eye large, one-third length of head ; head short, 4.25 times in length ; 
scales, 1. long. 66; 1. transv. 10. 0. SPECTRUM. 
Eye smaller, 4.5 times in head; head shorter, 4.75 in total; scales 
smaller, 1. long. 68; 1. transv. 16. 0. ABBOTTII. 
Eye 44.25 ; head 4, longer ; scales, 1. long. 65-7; 1. transv. 13 (14). 
0. VIRIDESCENS. 
Osmerus spectrum, Cope. 
Species nova ; smelt of Wilton. 
Established on two specimens sent from the above locality in Franklin 
Co., Maine. Form slender, the head short, with remarkably large eye, 
and short mouth and maxillary bones. Mandible prominent when closed, 
as in O, viridescens, the end of the maxillary bone not extending beyond 
the line of the middle of the pupil. Both the length of the muzzle and 
the interorbital width are considerably less than the diameter of the orbit. 
The form of the body is more slender than in the 0. viridescens, the depth 
entering the length without caudal fin, 8.33 times. Radii D. 10 A. 1.15. 
V. 8. The pectorals extend 2 the distance to the base of the ventrals. 
Length of a medium sized specimen, 3 in. 6 lin. Scales in about as many 
transverse, but several fewer longitudinal series than in the other species. 
Color probably translucent in life, a silver band along the upper part of 
the sides. Side of head and operculum silver. Top of head, middle dor- 
sal line and caudal fin so thickly punctate with black as to be colored. 
Wilton Pond is near the head of the south-west branch of the Kennebec 
River in 5. W. Maine. The characteristics of this species, according to 
Commissioner Atkins, are seen in specimens of larger size than those here 
described, which were taken in breeding condition. 
Osmerus abbottii, Cope. 
Species novi. 
This fish is in general characters more like the O. viridescens than the 
last ; it is similar in the size of the orbit and posterior prolongation of the 
maxillary bone, but the scales are more numerous and the head is shorter. 
Like the last, it is considerably smaller than the common smelt. 
The depth enters the length without caudal fin, seven times ; the head 
the same, 4.75 times. The orbit is less than the length of the muzzle, 
and scarcely equal to the interorbital width. The maxillary is delicately 
