362 PROCEEDINGS OF THE ACADEMY OP 



species seem now to be referable to the genus: (1) the typical 

 species {G. cynoglossus = Pleuronectes cynoglossiis, Linn); (2) a 

 rare British form (G. elongatiis = Platessa elongata, Yarrell), and 

 (3) an luulescribed species peculiar to the Acodian province of 

 naturalists (G. acadianus. Gill). These appear to represent two 

 sections of the genus; the first species one, and the second and 

 third another. 



GLYPTOCEPHALUS ACADIANUS, Gill. 



The height of the body enters about 2| times in the length, ex- 

 clusive of the caudal (3^ in the extreme length) ; the height of 

 the caudal peduncle is little more than 1^ of its length. The 

 head enters 5^ times in the length. 



The teeth are decidedl}' unlike on the respective sides, those of 

 the blind side being close set, with incisorial edges, about 17 in 

 the upper jaw, and 20 in tlie lower ; those of the eye side distant, 

 obtusely conic, 6 in the upper and 7 in the lower jaw. The greatest 

 height of the dorsal equals about half the length of the head, as 

 does also that of the anal. The caudal fin enters about 5^ times 

 in the extretne length. The pectoral fin (of the dark side) is con- 

 siderably more than half tlie head's length, and the ventral coii- 

 siderabl}' less than half; the base of the ventral is under that of 

 the pectoral (but a little further advanced). 



D. 110, A. 100. 



The color is rufous-brown, immaculate. 



The single specimen, from which the above description was 

 taken, was apparently not full grown, and, as already remarked, 

 was obtained from a net at Eastport, Maine. 



The species is evidently congeneric with, and closelj' related 

 to, the G. elongaius (Flalestio elongata), of which an incorrect 

 figure is given in Yarrell's work, and (in some respects) a more 

 accurate one in Couch's History of British Fishes; it is, however, 

 less elongated and the head larger. 



