MARINE ISOPODA OF NEW ENGLAND, ETC. 

 Sjiecimens examined. 



319 



Locality. 



Bottom. 



■When col- 

 lected. 



Receivedfrom — 



Speci- 

 mens. 



No. Sex. 



Dry. 

 Ale. 



1921 

 1917 

 1916 

 1915 



1914 

 1920 



1919 

 1918 



1912 



New Haven, Conn. . . 



Stony Creek, Conn. . 



Noank Harbor, Conn. 



Vineyard Sound, 

 Mass. 



....do 



Provincetown, Mass. 



....do 



....do 



....do 



..-.do -. 



Gloucester, Mass . . . 



....do 



Casoo Bay 



Eastport, Me 



Eastport, Me., Dog 

 Island. 



Indian Tickle, Lab- 

 rador. 



Hopedale, Labrador. 



Oban, Scotland 



May 1,1871 



L. w. 



Under stones 



Shore . 

 ...do. 



L. w. 



Eel grass . . 



Algae 



Tide pools . 



,1874 



,1871 



,1871 



,1872 



,1879 



Aug. 13, 1879 

 Aug. 13, 1879 

 Aug. 23, 1879 

 ,1878 



H.S.EishCom 

 ....do 



L. w. 



Under stones 

 Tide pool 



,1873 



1868-1870 

 ,1872 



Stone . 



— , 1877 



....do 



....do 



...do 



....do 



....do 



....do 



....do 



....do 



....do 



A.E.Verrm... 

 U.S. Fish Com 



A. S. Packard . 



...do 



Kev.A.M.Nor- 

 man. 



Ale. 

 Ale. 

 Ale. 

 Ale. 



Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale. 



Ale. 



Ale. 

 Ale. 



* Aselius gronlandictt$ Packard, MSS. 



Janira Leacli. 



Jawim 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 Aselius; antennulse slender, with a 

 multiarticulate flagellum ; antennae elongated, with a siDine, 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 coipi)lete flexion on 

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

 succeeding pairs 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 differences from Janira 

 maculosa Leach, the tyj)e 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 laminte, 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 antero-lateral angles are also produced, 

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



