378 0. Harger Isopodafrom Neiv England. 



Second pair of legs elongated, basis flattened and curved, dac- 

 tylus slender but shorter than the propodus. Bases of last 

 three pairs of legs swollen. Ilropoda bearing setas at the tips 

 of the segments, biramous ; outer ramus short, scarcely if at all 

 surpassing the basal segment of the inner ramus which is six- 

 jointed and tapering. Length 2'2mm., breadth 0.33mm. Color 

 nearly white. 



This species is rather abundant among eelgrass and alga? 

 at Noank and Woods-Holl, and probably other localities on 

 the southern shore of New England. I formerly considered it 

 as identical with Tanais filum Stimpson and supposed its range 

 to extend as far as the Bay of Fundy. I now regard that :is 

 an error, as it is probable that T. filum is a true Tanais with 

 simple uropoda, though I have as yet seen no specimens from 

 the Bay of Fundy, nor any fully answering to Stimpson's 

 description. 



Paratanais limicola, sp. nov. 



This species considerably resembles the preceding, but may 

 be distinguished from it by the following characters : The eyes 

 are small and rather inconspicuous, at least in the females, be- 

 ing only about half the vertical diameter of the antennulae. 

 The antennulae have the second segment short, about half as 

 long as the third. The dactylus of the second pair of legs, 

 with its slender, acicular, terminal spine is longer than the 

 propodus. The pleon is not dilated at the sides. The uro- 

 poda have the outer ramus two-jointed, slender, and surpass- 

 ing the basal segment of the inner ramus which is five-jointed, 

 with the basal segment long and imperfectly divided. Length 

 2 '5 mm. 



This species was obtained on a soft muddy bottom in forty- 

 eight fathoms, Massachusetts Bay, off Salem, in the summer 

 of 1877, by the United States Fish Commission. 



Paratanais cceca, sp. nov. 



Body slender, elongated and loosely articulated. Head nar- 

 row in front, not broader than the bases of the antennulae. 

 Eyes wanting. Anteunuke four-jointed ; first segment form- 

 ing less than half its length ; second segment longer than the 

 third ; last segment about as long as the second, slender, taper- 

 ing and tipped with setae. Antennae attaining the tip of the 

 third antennular segment. First pair of legs slender as com- 

 pared with those of the preceding species, attaining the tip of 

 the antennas, basal segment subquadrate, hand or propodus less 

 robust than theccirpus; digital process of propodus serrated: 

 dactylus short. Second (first free) thoracic segment two-thirds 

 as long as the third, which is equal to the fourth and fifth ; sixth 

 and seventh progressively shorter. Second pair of legs scarcely 

 more slender than the following pairs, basal segment not curv- 



