120 



NATURAL HISTORY OF ARCTIC AMERICA. 



Coitus octodecimspinosus Mitcliill is known from Halifax on the north 

 to Beesley's Point, New Jersey, on the south, where it was collected by 

 Prof. S. F. Baird in 1854. It is considered a shallow -water species ; but 

 the United States Fish Commission has a specimen from 68 fathoms in 

 the Gulf of Maine, where the temperature was about 42 Fahr. The 

 greater portion of the examples were from 10 fathoms or less. 



Add to these Cottus scorpioides of Fabricius, and it will complete the 

 list of Eastern North American species of the genus Cottus so far as 

 known. 



As already intimated, Cottus scorpius sub-species gronlandicus is quite 

 readily separated from the typical C. scorpius by its wider interorbital 

 distance and its higher spinous dorsal, which differences are best exem- 

 plified in the specimens from Greenland, and appear, along with others, 

 in the measurement tables. 



Table of Measurements. 

 Species, Cottus scorpius sub-species gronlandicus. 



