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 pomted 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.G™°» 

 to 3.8"^", and in breadth from O.G""" to CS™"". 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 ^^eck 

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

 Leptochelia filum= Tamisfilum Stimpson, Mar. Invert. Grand Manau, p. 43, 1853. 



" Bay of Fundy," Stimpson. 



Leptochelia ccsca — raratanais cccca Hargcr, Am. Jour. Sci., Ill, vol. xv, p. 378, 1878. 



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

 Bay, oft' 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 : 



Synidotea hictispida Harger. 

 Astacilla granidata Harger. 

 Cirolana polita Harger. 



Gyge Hlppohjics Bate and West- 

 wood. 

 Phryxus ahdominaUs Lilljeborg. 

 Dajus mysidis Kroyer. 

 Janira alta Harger. 

 Janira spinosa Harger. 

 Munna FabricU Kroyer. 

 Munnopsis fypica M. Sars. 

 Earycope robusta Harger. 

 Synidotea nodulosa Harger. 



jEga psora Kroyer. 

 Gnathia cerina Harger. 

 Leptoclielia limicola Harger. 

 Leptochelia rapax Harger. 

 Leptoclielia filum Harger. 

 Leptoclielia cceca Harger. 



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



Cirolana concharum H^jger. 

 Nerocila munda Harger. 

 ^gathoa loliginea Harger. 

 Livoneca ovalis White. 

 Tanais vittatm Lilljeborg. 



Scyphacella arenlcola Smith. 

 Actoniscus cllipticus Harger. 

 Cepon distortus Leidy. 

 Erichsonia filiformis Harger. 

 Ericlisonia attenuata Harger. 



