MARINE ISOPODA OF NEW ENGLAND, ETC. 



Specimens examined. 



sst 



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 



Bauquereau 



Grand Menan Bank. . 



do 



Brown's Bank 



, do 



do 



Lat. 43° 25' N., Lon. 



60° W. 

 Davis's Straits 



150 



40-50 

 100 



100 

 52 



30 

 180 



Parasitic on — 



Codflsk 



...do 



....do 



Skate (Baia) . 



Halibut 



Codfish 



Codfish . 

 ...do ... 

 ...do ... 

 Halibut. 



...do ... 



When col- 

 lected. 



-, 1872 



— , 1878 



— , 1879 



Keceived froiu- 



Packard and Cooke 



Colonial Mus., Hal- 

 ifax. 



Schooner Alice G. 

 Wonson. 



J. P. Shenielia 



Capt.J.Q.GetchoU 



J.P.Shemelia 



TJ. S.Fish Com'n.. 



Schooner Marion . . 



Schooner Kehecca 

 Bartlett. 



Schooner Peter D. 

 Smith. 



U.S. Fish Com'n.. 



Mr. Isaac Butler . . 



Capt. J. Q. Getchell 



— do 



Capt. S. W. Smith 

 and crow. 



Mr. N. P. Scudder . 



''A « 



Dry. 



Ale. 



Ale. 



Ale. 



Alo, 



Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale. 



Ale. 



Ale. 

 Ale. 

 Ale. 

 Ale. 

 Ale. 



Ale. 



Syscenus* gen. no v. 



Eyes wanting-; ijalpus 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 differs from JEga by characters that point toward the 

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

 maxillijieds, 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 GymothoidcB by the form of the head, which is not produced 

 over the bases of the antennulae but merely projects slightly between 

 them. The autennulce moreover are composed of three i)eduncular 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 differ from the first 

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

 uropods are distinctly ciliated. 



Syscenus infelix sp. uov. 



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. 



* HvGKijvog, a messmate. 



