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 propoclus is made up of 

 the slender digital process, which hears 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 pleou are of about equal length ; the sixth 

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

 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 inm 

 to 3.8 mm , and in breadth from O.G mm to O.S mm . 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 Yleck 

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



Leptcclielia filum= Tanaisfthim Stimpson, Mar. Invert. Grand Marian, p. 43, 1853. 



" Bay of Fundy," Stimpsou. 

 Leptoclielia ccBca.=Paratanais circa Hargcr, 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 Hlppolytcs Bate and West- 



wood. 



Phryxus <tt><!<>//i/naUs Lilljeborg. 



Dajus mysidis K rover. - />'//" psora Kroyer. 



Janira alia Ilarger. 

 Janh-fi xpinosa Ilarger. 

 .Munna Fabric! i Kroyer. 

 Mu it no] >.'; is typica M. Sars. 

 Eunjcopc robusta LTarger. 



nodidosa Harger. 



Synidotea bicitxpida Ilarger. 

 Axtacilla (jramdata Harger. 

 Cirolitn/i }>!>!! fa Harger. 



Gnatliia 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 : 



.Scyphacella arenicola Smith. 

 Actoniseus ellipticus Harger. 

 Cepon distortus Leidy. 

 Ericlisonia filiformis Harger. 

 JZriclisonia attenuata Harger. 



Cirolana concliarum Harger. 

 munda Harger. 

 loUf/inea Harger. 

 Livoneca ovalis White. 

 Tanais cittatu-s Lilljeborg. 



