MARINE ISOPODA OF NEW ENGLAND, ETC. 

 Spedmena examined. 



387 



.0 



1398 

 2139 



2154 

 2156 

 2157 



2158 



2155 



Locality. 



George's Bank, lat. 

 42° 11' N., Ion. 67° 

 17' W. 



George's Bank. 



.do 

 .do 



N. E. George's Bank. . 



Gulf of Maine 



Banquereau 



Grand Menan Bank. 



do 



Brown's Bank 



do 



do , 



Lat. 430 25* N., Lon. 



60° "W. 

 Davis's Straits 



150 



47 



40-50 

 100 



100 

 52 



30 

 180 



Parasitic on — 



Codfish 



...do 



...do 



Skate (Baia) . . 



Halibut 



Codfisli 



Codfish . 

 ...do... 

 ...do ... 

 HaUbnt 



...do ... 



When col- 

 lected. 



-, 1872 



, 1878 



May 8, 187!) 

 May 15, 1879 

 Nov. 29, 1878 



, 1878 



, 1878 



, 1878 



, 1878 



, 1878 



Dec. 19,1878 

 Feb. 13.1879 

 May 1, 1879 

 Aug. 21, 1879 



, 1879 



Received from — 



Packard and Cooke 



ColonialMus., Hal- 

 ifax. 



Sc liooner Alice G. 

 Wouson. 



J. P. Shemclia . 



Capt..J.Q.GetcheU 



J. P. Shemelia 



U.S. Fish Com'n.. 



Scliooncr Marion . . 



Schooner Rebecca 

 Bartlett. 



Schooner Peter D. 

 Smith. 



IT. S. Fish Com'n.. 



Mr. Isaac Butler . . 



Capt.J.Q.GetcheU 



do 



Capt. S. W. Smith 

 and crow. 



Mr. N. P. Scudder . 





1^ " 



10 



Dry. 

 Ale. 



Ale. 



Ale. 



Alo. 



Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale 

 Ale' 



Ale 



Alo. 

 Ale 

 Ale 

 Ale 

 Ale 



Ale 



Syscenus* gen. nov. 



Eyes wanting ; palpus of maxillipeds two-jointed ; sixth and seventh 

 pairs of legs elongated; pleon suddenly narrower than the thorax j 

 pleopods naked. 



This genus is unfortunately represented in the collection by a single 

 specimen. It diifers from ^ga by characters that point toward the 

 Cymothoidw, as in the reduction of the segments of the palpus of the 

 maxUlipeds, the sudden constriction at the base of the pleon, and the 

 naked pleopods. The absence of eyes, although a conspicuous charac- 

 ter can hardly be regarded as of great taxonomic value. It is separated 

 from the CymotJioidce by the form of the head, which is not produced 

 over the bases of the antennulae but merely projects slightly between 

 them. The antennulae moreover are composed of three peduncular seg- 

 ments and a flagellum ; the basal segments are much smaller than in 

 ^ga and less flattened, but still form a part of the anterior outline 

 when seen vertically. The last four pairs of legs diifer from the first 

 three, and are more or less elongated and fitted for crawling. The 

 uropods are distinctly ciliated. 



Syscenus infelix 8]j. nov. 



This species may be recognized among our Isopoda by the possession 

 of the full number of segments, the ciliated uropods, naked pleopods, 

 and the absence of eyes. 



* XvoKT/vog, a messmate. 



