COPEPODA FROM IFALUK ATOLL 167 



The particulars of legs 2 to 4 appear from figures 60e-g, the setal 

 formula, and the following notes. Setal formula: 



Endopodite of leg 2 modified; jointing between endopodal segments 

 2 and 3 distinctly developed. Segment 1 with normal internal seta; 

 segment 2 with 2 fine internal setae, segment 3 with 3 internal setae 

 and 2 flattened, almost straight, spines at the apex (fig. 60c). 



Jointing between exopodite and baso-endopodite of leg 5 weakly 

 indicated; external lobe big, with a fine seta. There are 5 setae on 

 the exopodite and 3 at the baso-endopodite; the position and shape 

 can best be judged from figure 61/. 



Color (according to field notes) cream with dark-dotted, longi- 

 tudinal bands, completely faded in alcohol. 



Remarks. — This species, the male at least, is exceedingly close to 

 Eudactylopus striatus Sewell and differs principally in the color pattern. 

 Lengths of the sexes, as given by Sewell, are: 1.165 for the adult 

 female, 0.74 for the adult male, and 1.15 for the male Vth copepodite 

 stage. The identification of the Ifaluk specimen is mainly on the 

 strength of the color pattern and the general agreement with Sewell's 

 description of this stage. In the absence of notes on the color, I 

 do not see how it can be distinguished from the corresponding stage of 

 Eudactylopus latipes, which might also occur in the collection. 



E. fasciatus previously has been recorded from Nancowry Harbour 

 in the Nicobar Islands and Addu Atoll in the Maldive Archipelago, at 

 both localities between algae. The present specimen was washed 

 from the alga Lyngbya from the lagoon shelf at Falarik in the Ifaluk 

 Atoll, at a depth of about 6 feet. 



Eudactylopus australis Nicholls, 1941 



Eudadylopus australis Nicholls, 1941, p. 410, fig. 15; 1942a, p. 135, fig. 1. — 

 Krishnaswamy, 1950, p. 119. 



This species has the general appearance of E. spectabilis (Brian); it 

 is, however, characterized by a 2-segmented exopodite of the antenna. 

 The original records are from Sellick Beach and Spencer Gulf in South 

 Australia, where females, 1.26 to 1.38 mm. length, were found in 

 dredgings and weed washings. Additional female and male specimens 

 were recorded by Nicholls (1942a) from South and Western Australia, 

 particularly Rottnest Island; these specimens show small structural 

 differences with those previously recorded. The female, moreover, 

 is much larger (1.68 mm.); the males measured 1.35 mm. and, in the 



646-471—64 12 



