164 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



is even somewhat longer than the carpus, and usually strongly flexed 

 beneath it. More than half the length of the propodus is made up of 

 the slender digital process, which bears a low tooth on the inner side, 

 near the base, and a stouter one near the slender incurved tip. The 

 dactylus is slender, curved, and pointed, and armed with a few weak 

 spinules along the inner margin. The forceps thus formed are capable 

 of seizing and closing around the body of another individual. 



The thoracic segments, except the first, are well separated ; the second 

 (first free) segment is shortest ; the third, fourth, and fifth segments are 

 of increasing length ; the sixth is as long as the fifth ; the seventh shorter. 

 The first five segments of the pleon are of about equal length ; the sixth 

 shorter and obtusely pointed in the middle. The uropods consist on 

 each side of a robust basal segment, bearing two rami, the outer short, 

 and composed of a single segment, the inner five-jointed and tapering. 

 Both rami are sparingly bristly. The males vary in length from 2.6°"" 

 to 3.8'"'°, and in breadth from 0.6™'" to 0.8""^'. The females are more 

 slender. Color in alcohol nearly white or marked in the males by a 

 brownish transverse band along the posterior margin of each segment. 



This species was collected by Professor Hyatt and Messrs. Van Vleck 

 and Gardner at Annisquam, Mass., in the summer of 1878. 



Leptochelia filuin= Tanais filum Stimpson, Mar. Invert. Grand Manan, p. 43, 1853. 



" Bay of Fundy," Stimpson. 

 Leptochelia cceca =: Paratanais cceca Harger, Am. Jour. Sci., Ill, vol. xv, p. 378, 1878. 



Collected along with L. limicola in 48 fathoms, mud, Massachusetts 

 Bay, off Salem, 1877. 



Of the forty-three species enumerated in the preceding list, the follow- 

 ing eighteen have as yet been found only north of Cape Cod : 



Gyge Ri/ppolytes Bate and West- Synidotea hicuspida Harger. 



wood. 

 Phryxus abdominalis Lilljeborg. 

 Dajus mysidis Kroyer. 



Astacilla granulata Harger. 

 Cirolana polita Harger. 

 ^ga psora Kroyer. 



Janira alta Harger. | Gnathia cerina Harger. 



Janira spinosa Harger. [ Leptochelia limicola Harger. 



Munna Fabricii Kroyer. ! Leptochelia rapax Harger. 



Munnopsis typica M. Sars. i Leptochelia filum Harger. 



Durycope robusta Harger. ' Leptochelia cwca Harger. 



Synidotea nodidosa Harger. | 



The following ten have been found only south of Cape Cod : 



Scpphacella arenicola Smith. 

 Actonisciis ellipticus Harger. 

 Cepon distortus Leidy. 

 .Erichsonia filiformis Harger. 

 Eridisonia attenuata Harger. 



Cirolana concharum Harger. 

 Nerocila munda Harger. 

 JEgathoa loUginea Harger. 

 Livoneca ovalis White. 

 Tanais vittatus Lilljeborg. 



