COPEPODS OP THE WOODS HOLE REGION 



293 



CLYTEMNESTRA ROSTRATA (Brady) 

 FiGUKB 179 



Goniopsyllus rostratus Brady, Voyage of H. M. S. Challenger, vol. 8, pt. 23, 



Copepoda, p. 107, pi. 42, figs. 0-16, 188.3. 

 Clytemnestra rostrata Giesbrecht, Fauna und Flora des Golfes von Neapel, 

 vol. 19, p. 566, pi. 4.5, 1892. 

 Occurre7we.—T\\o females were obtained from a vertical haul at 

 Station 20044, Grampus, southeast of Nantucket. 



Distri-bution.-^onth Atlantic (Brady) ; Red Sea, Indian Ocean 

 (Thompson and Scott) ; California coast (Esterly) ; Mediterranean 

 (Giesbrecht) ; Gulf of Guinea (T. Scott) ; Adriatic (Car, Graeffe, 

 Steuer, Pesta) ; Gulf of 

 Genoa (Brian) ; Gulf 

 Stream south of Marthas 

 Vineyard (Wheeler). 



Color. — Body trans- 

 parent and reddish, 

 owing to a distribution 

 throughout the body 

 cavity of numerous 

 small oil globules. Some 

 of these are pale rose 

 color, others pale ferru- 

 ginous-red, and the re- 

 mainder light green. 

 The ovaries and eggs 

 are dark gra}'^ with a 

 reddish tinge; the eyes 

 are deep carmine-red. 



Female. — Cephalic segment not much longer than wide, with prom- 

 inent posterior corners ; fifth segment much narrower than the fourth, 

 with smoothly rounded sides; caudal rami as wide as long, the 

 apical setae nonplumose and very short. First antennae 7-seg- 

 mented and slender ; exopod of second antenna replaced by a single 

 seta, which is very elongate and is attached to the end of the basal 

 endopod segment. Each first antenna carries six aesthetasks, two 

 on the third segment, two on the fourth segment, and two at the 

 tip of the sixth segment. Each fifth leg is as long as the exopod of 

 the fourth leg, its distal segment three times as long as the basal, 

 with two elongate apical setae, plumose on the inside, denticulate on 

 the outside, and three much shorter nonplumose outer setae; basal 

 segment with an outer seta representing the outer process; inner 

 expansion entirely lacking. Total length, 0.5-0,87 mm, 



FiGCRE 179. — Clytemnestra rostrata: a, Female, dor- 

 sal ; b, female, fifth leg ; c, male, fifth leg 



