MARINE ISOPODA OF NEW ENGLAND, ETC. 

 Specimens examined. 



319 



1921 

 1917 

 1916 

 1915 



1914 

 1920 



1919 

 1918 



1912 

 619* 



Locality. 



New Haven, Conn. . . 



Stony Creek, Conn. . 



Noank Harbor, Conn. 



Vineyard Sound, 

 Mcass. 



....do 



Provincetown, Mass. 



....do 



....do 



....do 



...do 



Gloncester, Mass . . . 



....do 



Caaoo Bay 



Eastport, Me 



Eastport, Me., Dog 

 Island. 



Indian Tickle, Lab- 

 rador. 



Hopedale, Labrador. 



Oban, Scotland 



L. Tf. 



L.W. 



L. -w. 



Bottom. 



Under stones 



Shore . 

 ...do . 



Eel grass . . 



Algsa 



Tide pools . 



Under stones 

 Tide pool 



Stone . 



When col- 

 lected. 



Keceived&om — 



May 1,1871 



,1874 



,1871 



,1871 



,1872 



,1879 



Ang. 13, 1879 

 Aug. 13, 1879 

 Aug. 23, 1879 

 ,1878 



,1873 



1868-1870 

 ,1872 



— , 1877 



No. Sex. 



U.S.EishCom. 

 ....do 



...do 



....do 



...do 



...do 



....do 



....do 



....do 



....do 



....do 



A.E.Verrill... 

 U.S. Fish Com, 



A. S. Packard 



....do 



Eev.A.M.Nor- 

 man. 



Speci- 

 mens. 



d 9 

 d" 9 



d 9 



9 



9 d" 



Dry. 

 Ale. 



Ale. 

 Ale. 

 Ale. 

 Ale. 



Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale. 

 Alo. 

 Alo. 



Alo. 



Alo. 

 Alo. 



*AseUus grSnlandicut Packard, MSS. 



Janira Leacli. 



Janira Leach, Edinb.Encyc, vol. vii, p. "434" (Amer.ed., p. 273), "1813-14". 

 Asellodes Stimpson, Mar. Inv. Grand Manan, p. 41, 1853. 



Body loosely articulated as in Asellus; antennuljB slender, with a 

 multiarticulate flagellum ; antennae elongated, with a spine, or scale, on 

 the second segment and with a long multiarticulate flagellum ; mandibles 

 palpigerous ; lateral margins of the thoracic segments not completely 

 covering the bases of the legs; first pair of legs prehensile; the carpus 

 thickened, and the propodus slender and capable of complete flexion on 

 the carpus ; dactylus short and armed with two small ungues, as in the 

 succeeding ijairs of legs ; uropods well developed, biramous. 



This genus is represented on our coast by two species, one of which 

 was originally described by Stimpson under the name Asellodes alta. It 

 does not, however, seem to present any generic dififerences from Janira 

 maculosa Leach, the type of the present genus. Stimpson's generic 

 description appears to have been drawn from the male, as he says : " Ex- 

 ternal pair of natatory feet having each two laminae, like the others, but 

 broader and hardened, so as to perform the office of an operculum." 

 The two inner of these laminae are, however, united along the median 

 line nearly to the tip, as will be seen below. 



Our species of this genus may be further characterized as follows : The 

 body is elongate oval in general outline, between two and three times as 

 long as broad. The eyes are distinct. The head is produced medially 

 into a distinct rostrum, and the anterolateral angles are also produced, 

 but in the typical species {J. maculosa Leach) the head is rounded ante- 



