416 



i'i;<»'i:i:ni\<;s of tiii: \ \tio.\al mi si:i \i. 



vol. 38. 



Occurrence. Collected by a birge not among algae, muddy bottom, 

 in the brackish ponds about Woods Hole, Massachusetts, July. 



Distribution. — Scottish coasts (Scott); Spitzbergen (Scott); Nor- 

 wegian Fjords (Sars); Chailestown Pond, Rliode Island (Williams). 



Family PKLTIDIIDJ;. 

 Genus ALTEUTHA Baird, 1846. 



ALTEUTHA DEPRESSA Baird. 



Alteutha depressa Baird, British Entomostraca, L850, ]>. 216, pi. 30, figs. 1, 2. — 

 Brady, Copepoda of the British Islands, vol. 2, L880,p. 160, figs. 1-5.— G. O. 

 Saks, Crustacea of Norway, vol. 5, 1903, p. 64, pi. 38, 12 figs. 



Length. — Female, about 1.3 mm. 



Characters. — Body yellowish in color, hut with a strikingly dark 

 purplish transverse band near the middle, occupying three segments. 

 Body much depressed seen dorsally, oblong-oval in form, with the 



greatest width about the middle. 

 Cephalic segment very large, ex- 

 ceeding in length the four succeed- 

 ing segments combined. Anterior 

 antenna short and stout, nine-seg- 

 mented. Fifth legs robust, and 

 armed at the tip with three coarse 

 spines (fig. S b). 



Hi marks. — When seen with a 

 sma.ll lens the most striking char- 

 acter is the shape and color. It 

 somewhat superficially resembles 

 certain of the parasitic Copepods, 

 as Argulus. While Sars (190.3, p. 

 64) speaks of it as usually occur- 

 ring in depths varying from (> to 

 •JO fathoms on a sandy or gravelly 

 bottom, my best haul of these 

 curious little creatures was made with a surface net, but a few inches 

 below the surface in open water jusl along the Bureau of Fisheries 

 wharf at Woods Hole. Massachusetts. 



Occurrence. Collected with a birge net among algae, in about 2 

 fathoms of water, over sandy bottom, Sheepshead Bay, New York, 

 September. Also surface net jusl oil' Fisheries wharf, Woods Hole, 

 Massachusetts. It has not, to my knowledge, been heretofore re- 

 ported from American shores. 



Distribution. British seas (Brady); coast of France (Canu); west 

 coast of Norway and Trondhjem Fjord (Sars). 



c 



FlG. S. U.TF.rTU \ DEPRESSA. <l, VENTRAL VIEW 

 OF MALE: /). FIFTH FOOT OF FEMALE; C, CAUDAL 

 RAMUS OF Fl M u.i .. 



