284 U.S. NATIONAL MUSEUM BULLETIN 2 36 



The female specimen from locality 800 is very strongly contracted 

 and consequently much shorter (figs. 112a). The young male has 

 7-segmented antennules, while the 4th and 5th (anal) somites of the 

 abdomen are fused. Furcal structure as in adult female (fig. 1126, c). 



Remarks.^ — I have identified the specimens described above with 

 Phyllopodopsyllus longicaudafus A. Scott, 1909, described from a 

 single male specimen captured by the Siboga Expedition near Pater- 

 noster Island in the Malay Archipelago. The resemblance of the 

 adult female specimens with the male described by A. Scott is partic- 

 ularly striking as far as the furcal structure is concerned. There 

 are differences in the setation of the endopodites of legs 3 and 4, 

 but differences in setation of these appendages in the sexes are known 

 also to occur in species where male and female are definitely known, 

 e.g., P. bradyi (T. Scott, 1892), which shows the same differences in 

 setation between the sexes as are shown by the Ifaluk specimens and 

 A. Scott's description of the male. With P. bradyi, the present form 

 is undoubtedly closely related; both species have identical setal 

 formulae and differ principally in furcal structure. 



A single male specimen, 0.58 mm. long, was captured in a night 

 surface plankton haul off Island Kawasang, Paternoster Island, during 

 the Siboga Expedition. The species has not been recorded since. 

 The present specimens originate from a sand sample taken some 340 

 feet off the reef margin and from beneath boulders at Falarik in the 

 Ifaluk Atoll. 



Phyllopodopsyllus berniudae Lang, 1948 



Phyllopodopsyllus longicaudatus Willey, 1935, p. 88, figs. 149-162. 

 Phyllopodopsyllus hermudae Lang, 1948, p. 887, fig. 357 (no. 2). — Crisafi, 1960, 

 p. 500. 



Males and females of this form were recorded from Harrington 

 Sound in Bermuda by Willey. The description and figures leave 

 no doubt that this species differs from P. longicaudatus, under which 

 name they were recorded. 9 0.93 mm.; cf 0.63 mm. The species 

 has not been recorded since. 



Phyllopodopsyllus minutus Lang, 1948 



Phyllopodopsyllus minor Willey, 1935, p. 91, figs. 163-172. 



Phyllopodopsyllus minutus Lang, 1948, p. 887, fig. 357 (no. 1.) — Crisafi, 1960, 

 p. 500. 



Males and females were found by Willey in Harrington Sound in 

 Bermuda and recorded as P. minor; they belong, as Lang proved, to a 

 new form, described by him as P. minutus, 9 0.66 mm. ; cf 0.54 mm. 

 The species has not been recorded since. 



