No. 477] mODE ISLAND COPEPODA 



651 



12 to 20 stiff, slender bristles which form a conspicuous brush. 

 The furcal setae and the hairs on the inner edge of the furca are 

 as in the female. Left fifth limb 3-jointed, more than twice the 

 length of the right (Fig. 14). Basal joint nearly as broad as long; 

 the second joint long, with one or more bristles on the inner and 

 outer edges; distal joint arcuate, pointed, nearly as long as the 

 other two, and with three recurved bristles on tlie outer and one 

 on the inner edge. Right fifth limb is .'j-jointnl, the l:i>r two 

 joints forming a heavy pincer; the second joint i> >]H)()n->liaj)e(i 

 and receives a curved spine borne on the lower (anterior) side 

 of the end of the swollen terminal joint. 



Length of female 1.40 mm., of male 0.94 mm. 



Abundant in Xarragansett Bay and Charlestown Pond. 



This is the second species of Tortanus to be described from the 

 eastern coast of North America. T. discaudalus Thonij^son and 

 Scott ('98) from the Gulf of St. Lawrence is verv' similar to this 

 species. T. bumpmii Wheeler (:00) was found in Vineyard 

 Sound and is apparently T. di.scaudafm'. 



Oithona plumifera Baird 



Narrac. 



Oithona similis Claus 



ISfif). Oithona similis Claus. 



XarniuiuiM'tt Hay at Wickford, June. 



Longipedia coronata Claus 



