374 BULLETIN" 15 8, UNITED STATES NATIONAL MUSEUM" 



Remarks. — ^When alive this species may be recognized by its spots, 

 which still persist in preserved material, and also by the great reduc- 

 tion in size of the fourth endopods. The species has never before 

 been rejDorted from our American shores, and though found in 

 greater numbers than some of the preceding species, it is probably 

 like them a mere straggler from the south. 



Genus COPILIA Dana, 1849 



Body of female transparent and strongly depressed; head fused 

 with first segment, squarely truncated anteriorly, with a pair of knob- 

 like corneal lenses near the corners. Posterior margin of fourth 

 segment with a stout median spine pointed backward; urosome 

 4-segmented, the genital segment being divided by a median groove ; 

 caudal rami much longer than the urosome. First antennae 6-seg- 

 mented; second antennae 4-segmented; rami of first three pairs of 

 legs and exopod of fourth pair 3-segmented; fourth endopod 1-seg- 

 mented; fifth leg uniramose, 1-segmented. 



The male is very similar to the male of Sapphirina; head sepa- 

 rated from first segment, without corneal lenses; body segments 

 widened and flattened; posterior margin of fourth segment with a 

 median knob ; urosome 5-segmented ; caudal rami rodlike and shorter 

 than in female. A single species. 



COPILLA. MIRABILIS Dana 



Figure 229 



Copilia mirabilis Dana, United States Exploring Expedition, 1838-1842 

 (Wilkes), vol. 14, Crustacea, p. 1232, 1853 pi. 86, 1855.— Bbady, Voyage of 

 H. M. S. Challenger, vol. 8, pt. 23, Copepoda, p. 117, pi. 53, 1883. 



Occurrence. — Taken in a surface tow at Station 2223, Albatross^ 

 south of Nantucket. 



Distribution. — Kingsmill Islands, Pacific (Dana) ; Cape Verde 

 Islands (Lubbock) ; North Atlantic (Brady, Cleve) ; Canary Islands, 

 Malta (Thompson) ; Indian Ocean, Pacific (Giesbrecht) ; Malay 

 Archipelago (Cleve) ; Mediterranean, Gulf of Suez, Ked Sea 

 (Thompson and Scott). 



Color. — Body as transparent and colorles,s as glass, the only pig- 

 ment appearing in the unpaired eye, which is ruby red. 



Female. — Head quadrangular, widened posteriorly, with reentrant 

 lateral margins and as long as the rest of the body excluding the 

 caudal rami; third and fourth segments each with a median dorsal 

 spine. Posterior margins of urosome segments denticulate; anal 

 segment twice as long a^ the rest of the urosome and somewhat di- 

 lated distally; caudal rami linear, half as long as the body, diver- 



