MARINE ISOPODA OF NEW ENGLAND, ETC. 



405 



scribed and figured by Heller on the head of P. arcticaj and the flagel- 

 lar segments of both pairs of antennae distinguish it from P. costana 

 Bate and Wrstwood.J 



This species was dredged by Dr. Stimpson "on a shelly and some- 

 what muddy bottom in twenty fathoms off the northern point of Duck 

 Island," Bay of Fundy. It is rare south of Cape Cod, but was taken 

 in Vineyard Sound ! by the Fish Commission in 1871 ; also on St. George's 

 Bank!, in 110 fathoms, mud and sand; Gulf of Maine!, down to 115 

 fathoms; Bay of Fundy!, down to 80 fathoms on muddy, shelly, and 

 sandy bottoms; and off Xova Scotia!, 59 fathoms, pebbles, sand and 

 rocks, and at other localities as detailed below. It was dredged by 

 Mr. AYhiteaves in 200 fathoms in the Gulf of Saint Lawrence, between 

 Aiiticosti and the mainland of Gaspe". 



Specimens examined. 



Ftilanthura Harger. 

 Ptilanthura Harger, Am. Jour. Sci., III, vol. xv, p. 376, 1878. 



Antennulae with the flagellum remarkably developed in the male, 

 multiarticulate; second and succeeding antennular segments provided 



t Denkschrift, Acad. Wiss. Wien., B. xxxv, p. [14] 38, pi. iv, figa. 9-12, 1875. 

 t Brit. Sess. Crust., vol. ii, p. 165, 1866. 



