194 



BULLETIN" 15 8, UNITED STATES NATIONAL MUSEUM 



first to record it from American shores, but the present specimens 

 were collected 30 years before Sharpe's paper was published. Both 

 he and Fish obtained the species off the Bureau of Fisheries wharf 

 at Woods Hole, and Fish named it as one of the most common 

 summer copepods of the region. 



Family TEGASTIDAE 

 Genus PARATEGASTES G. 0. Sars, 1904 



Body short and compact, strongly compressed, with very hard 

 integuments ; head separated from first segment ; fifth segment fused 

 with genital segment and produced ventrally into a large process, 

 highly chitinized; abdomen short. First antennae 7-segmented; ex- 

 opod of second antenna 1-segmented; first legs with 1-segmented 

 rami, second and third legs with 2-segmented rami, fourth legs with 

 3-segmented rami ; fifth legs much enlarged and laminate in female, 

 narrow and linear in male. Only one species found here. 



PARATEGASTES SPHAERICUS (Claus) 



Figure 129 



Amymone sphaericus Clatjs, Die frei lebenden Copepoden, p. 114, pi. 20, figs. 



1-9, 1863. 

 Parategastes sphaericus Sars, Crustacea of Norway, vol. 5, p. 73, pi. 43, 1904. 



Occun^ence. — Fifty specimens, including both sexes, from surface 

 tow, Woods Hole harbor, September, 1881 ; one female from brackish 



pond on Chappaquiddick Island, 

 August, 1926; one female washed 

 from sand of Nobska Beach, Fal- 

 mouth, August, 1927. 



Distribution. — Scottish coast (T. 

 Scott) ; Helgoland (Claus) ; coast of 

 France (Canu) ; Mediterranean 

 (Claus) ; Ceylon (A. Scott) ; coast 

 of Norway (Sars) ; Adriatic (Pesta) ; 

 Narragansett Bay (Williams). 



Colo7\ — Body black, with a little 

 light red coloring at the anterior 

 margin of the head ; toward the pos- 

 terior end of the body the black 

 fades into a neutral tint or translucent gray, which is apparently 

 due to the legs coiled up beneath the body. The black color is abso- 

 lutely opaque (Kathbun). 



Female.— lu^tQv?i\ portions of head produced ventrally into large 

 laminae, whose postero-lateral corners are obtusely acute; ventral 

 dilation of genital segment quadrangular, its anterior corner tongue - 



Figure 129.- — Paralegastes sphaericus: 

 a. Female, lateral ; h, female, fifth 

 leg 



