COPEPODS OP THE WOODS HOLE REGION 469 



each fifth leg a small knob with a single seta ; sixth-leg rudiments 

 visible on the lateral margins of the genital segment. 



Genotype. — Eudactylinodes uncinata (Wilson). 



Remarks. — The two species here referred to this genus have pre- 

 viously been included in the genus Eudactylina by the present au- 

 thor. When they were first described it was realized that they dif- 

 fered considerably from the type species of Eudactylina., but as the 

 male remained unknown and might prove to be typical of that genus, 

 it was thought best to place them there temporarily. Now that the 

 male has been found and proves to be verj^ different from the Eu- 

 dactylina male it becomes necessary to establish a new genus for 

 these two species. 



KBnr TO THE SPECIES (FEMALES) 



1. Carapace emarginate posteriorly, with a stout spine at each 



corner; abdomen 2-segmented nigra (p. 471) 



Carapace straight or convex posteriorly, without spines; abdo- 

 men 1-segmented uncinata (p. 469) 



EUDACTYLINODES UNCINATA (Wilson) 



Plate 35, o-w 



Eu.dacti/Una uncinata Wilson, Proc. U. S. Nat. Mus., vol. 35, p. 453, pi. 74, 1908. 



Occurrence. — About 125 specimens, including both sexes, were taken 

 from the gills of two shovel-nosed sharks {Carcharias tavirus) cap- 

 tured in the fish nets on Marthas Vineyard, one in July, the other in 

 August, 1923. 



Distrihution. — California coast, gills of soup-fin shark (Wilson). 



Color. — Body yellowish white, sometimes tinged with brown, the 

 contents of the digestive system darker in color; Qgg strings yellow 

 or light orange. 



Female. — Carapace quadrilateral, posterior corners without spines; 

 second and third segments narrowed anteriorly, widened posteriorly ; 

 fourth segment barrel-shaped; fifth segment twice as long as wide, 

 with straight sides ; genital segment half as long and a little narrower 

 than the fifth segment; abdomen longer than genital segment, 1- 

 segmented ; caudal rami as wide as long, each with two apical and one 

 outer spine. First antenna 8-segmented, the second segment with 

 two stout curved claws and a broad lamina ; second antenna with a 

 short apical claw; endopods of first four pairs of legs longer than 

 exopods, 3-segmented, the second segment with two setae on the 

 inner margin in the first legs, but no seta in the other three pairs; 

 exopods indistinctly segmented, but with three segments indicated by 

 the arrangement of the spines; fifth leg a fingerlike process with an 

 apical spine. Total length, 2.5-2.75 mm. 



