SCIENTIFIC SURVEY. 



113 



Sub-class Teleostei. Saimonoid^. 



called Salmon trout caught ia the Schoodic lakes, in the eastern 

 part of the State (Washington county,) but I have as yet had no 

 opportunity of comparing the two together side by side. 



Dr. Girard considered it a new species, and in his description 

 observes — "Its large scales and fusiform body recall to mind the 

 salmon, but on a more close examination the general shape and 

 outline are far more elegant than in the salmon, preserving alto- 

 gether better proportions between the different regions of the body. 

 The head forms about a fourth of the entire length, whilst in the 

 salmon it is aboiit the sixth only. The eyes are of medium size 

 and sub-circular in shape, their diameter being contained about 

 seven times in the length of the head. The posterior half of the 

 maxillary, which is regularly and most decidedly curved down- 

 wards, gives to the shape of the mouth a peculiar aspect. The 

 anterior margin of the dorsal fin is equidistant between the tip of 

 the snout and the base of the caudal. The posterior margin of the 

 latter is regularly crescent-shaped. The adipose fin is elongated, 

 club-shaped, and situated opposite the posterior half of the anal. 

 The ventrals are inserted under the middle of the dorsal, somewhat 

 nearer the anal than the pectorals. The scales are remarkably 

 large, contrasting greatly when compared with those of Salmo 

 ery'hrogastei', (red-bellied trovJ,) and S. fonlinalis, or S. Namarjcush 

 or amethystus. There are about 115 of them in the latei'al line. 

 The color in the female is uniform silver-grey, darker on the back 

 and head. Sub-quadrangular or sub-circular black spots are ob- 

 served upon the sides of the head behind the eyes, along the back, 

 and the half of the flanks, also on the dorsal and caudal fins, where 

 the red is sometimes but faintly indicated. The name of Salmo 

 sebago is proposed for this species which inhabits the southwestern 

 part of the State of Maine." 



Salmo oquassa, Girard. 

 Blue back trout. 

 A speci«s of trout known by the name of " Blue backs," is found 

 in the lakes at the head of the Androscoggin river, in Franklin 

 County. This name is given them on account of the peculiar blue 

 color of the back and upper parts of their bodies. Dr. Girard took 

 opportunity to visit the lakes and make an examination of the 



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