COPEPODS OF THE WOODS HOLE REGION" 



185 



inner distal corner elongated and plumose. Fifth legs very small, 

 distal segment club-shaped, the three outer setae spiniform; basal 

 segment without inner expansion. Total length, 0.55-0.7 mm. 



Remarks. — ^When alive, and even after preservation in formalin, 

 this species can be recognized by the transverse bands of reddish 

 brown on the dorsal surface. It has not been reported before from 

 our Atlantic coast. Found in fresh, brackish, and salt water. 



HARPACTICUS CHELIFER (Muller) 



Figure 125 



Cyclops chelifer Mulleir, Zoologiae Danicae prodromus, no. 2413, 1776. 

 Harpacticus chelifer Saes, Crustacea of Norway, vol. 5, p. 49, pis. 27, 28, 1904. 



Occurrence. — At Little Harbor, Woods Hole, amid the eelgrass, 

 September, 1881 ; in limited numbers in Penzance Pond, Woods Hole; 

 Green Pond, Falmouth; 

 two of the brackish-water 

 ponds on Chappaquiddick 

 Island; Nashaquitsa Pond 

 and Farm Pond, Marthas 

 Vineyard; French Water- 

 ing Place, Naushon Is- 

 land; in surface tow at 

 Menemsha Bight, Marthas 

 Vineyard. 



Distrihution. — B r i t i s h 

 Isles (Brady) ; Kamchatka 

 (Poppe) ; North Sea 

 (Timm) ; coast of France 

 (Canu) ; Franz Josef Land 

 (T. Scott); Ceylon (A. 

 Scott); Helgoland 

 (C 1 a u s) ; Mediterranean 

 (Giesbrecht, Pesta) ; Bo- 

 husliin (Cleve) ; Arctic 

 Ocean (Mrazek) ; Indian Ocean (Thompson and Scott) ; New Zea- 

 land (Thomson) ; Jan Mayen (Koelbel) ; Nova Scotia (Wright) ; 

 Gulf of St. Lawrence (A. Scott) ; Chesapeake Bay (Wilson) ; 

 Charlestown Pond, R. I. (Williams); Woods Hole (Sharpe, Fish). 



Color. — Body a light yellow, fairly opaque, without pigment 

 markings. 



Female. — Cephalo!horax large and deep, with a conspicuous ros- 

 trum ; epimeral plates of the following segments rounded and closely 

 appressed to the sides of the metasome; urosome less than half the 



FicnRE 125. — Harpacticus chelifer: a. Female, 

 dorsal (after Sars) ; 6, male, fifth leg ; c, fe- 

 male, fifth leg 



