COPEPODA FROM IFALUK ATOLL 15 



is exceedingly vague. P. magnus occurred in one specimen, a female, 

 1.1 mm, length, from a pelagic haul at Agar's Island in Bermuda; it 

 has never been captured since. 



Pseudocyclops latens Gumey, 1927 



Pseudocyclops latens Gurnej% 1927, p. 455, fig. 108. — Nicholls, 1944, p. 10. — 

 Noodt, 1958a, p. 156.— M. S. Wilson, 1958, p. 178. 



One specimen, a female, 0.63 mm. length, is known; it occurred in 

 a night haul at Ismailia on Lake Timsah of the Suez Canal. Unfor- 

 tunately, Gurney could not describe the structiu-e of the antennules 

 and the mouth parts; only legs 3 and 5 are figured. 



Pseudocyclops latisetosus Sewell, 1932 



Pseudocyclops ohtusatus var. latisetosus Sewell, 1932, p. 330, figs. 108a-f 



Pseudocyclops latisetosus was described originally on the basis of 

 a single male specimen, 0.78 mm. length, from the Indian Ocean; 

 the exact locality is not given in Sewell's paper. It was introduced 

 originally as a variety of P. ohtusatus, with which undoubtedly it is 

 closely related, but in the structure of the 5th legs there are suffi- 

 cient differences to raise it to specific level. It is differentiated, 

 moreover, by a very peculiar structure of the fiu-cal setae. 



Pseudocyclops simplex Sewell, 1932 



Pseudocyclops simplex Sewell, 1932, p. 332, figs. 109a-l. — Nicholls, 1944, pp. 

 10, 11; 1944a, p. 489.— Noodt, 1958, p. 156. 



This species was described by Sewell on the basis of material from 

 the Indian Ocean; the exact locality and the number of specimens 

 is not given in his paper. There is a considerable discrepancy in 

 size between the female (0.5 mm.) and the male (0.72 mm.). Sewell's 

 drawing of the 5th legs of the male (fig. 1091) is very vague and 

 probably not fully correct. 



Pseudocyclops australis Nicholls, 1944 



Pseudocyclops australis Nicholls, 1944, pp. 11, 12, fig. 4; 1944a, p. 488. — Noodt, 

 1958, p. 156. 



Only two specimens of this form are known, the adult female 

 (0.78 mm. length) and a juvenile form; the adult female is the only 

 stage described. NichoUs' description, though rather short, contains 

 all points of importance and gives the setal formula of aU legs; all 

 essential appendages are figured. The species occurred at SeUick 

 Reef in South Australia. No further details are given. 



