COPEPODS OF THE WOODS HOLE REGION 



193 



Rami of first four pairs of legs 3-segmented ; fifth legs uniramose. 

 2-segmented, distal segment sword-shaped, with stout spines at its 

 tip. One species found here. 



ALTEUTHA DEPRESSA Baird 



FiGXJRE 128 



Alteutha depressa Baikd, Trans. Berwickshire Nat. Club, vol. 2, p. 155, 1845. — 

 Sabs, Crustacea of Norway, vol. 5, p. G4, pi. 38, 1904. 



Occurrence. — Three females were obtained in a surface tow inside 

 of Monomoy Island, Cape Cod, August, 1882. 



Distrihution. — British Isles (Brady, Baird) ; coast of France 

 (Canu) ; Norwegian coast (Sars) ; Chesapeake Bay (Wilson) ; 

 Sheepshead Bay, Woods Hole 

 (Sharpe). 



Color. — Bod}^ olive-yellow with 

 a dark purple transverse band 

 occupying the first three thoracic 

 segments. The tips of the ap- 

 pendages are also frequently tinged 

 with purple; the yellow portions 

 are fairly transparent, but the 

 dark band is nearly opaque; eye 

 red tinged with purple. 



Female. — B o d y strongly de- 

 pressed, widest at about the center, 

 head fused with first segment, the 

 two longer than the rest of the 

 metasome; posterior corners of 

 fifth segment angular; eye con- 

 siderably back of the anterior mar- 

 gin; urosome short and broad, each of its segments produced at its 

 posterior corners into conical points ; metasome segments with lateral 

 epimeral plates; caudal rami quadrangular, slightly longer than 

 wide, their terminal setae short and weak. 



First antennae 9-segmented; exopod of second antennae 2-seg- 

 mented, with 4 setae; endopod of first legs almost as long as exopod 

 and much widened ; fifth legs 2-segmented, proximal segment slightly 

 enlarged, with five inner setae, distal segment conically tapered and 

 tipped with three coarse spines. Total length, 1.2-1.4 mm. 



Male. — Unknown. 



Remarks. — This is a littoral rather than a pelagic species and is 

 nowhere found in abundance. Sars gave it as preferring a sandy or 

 gravelly bottom in comparatively shallow water. Sharpe was the 



FiGDEE 128. — Alteutha depressa; a, Male, 

 ventral ; h, female, fifth leg ; c, female, 

 caudal ramus. (From R. W. Sharpe, 

 Proc. U. S. Nat. Mus., vol. 38, p. 416) 



