COPEPODA FROM IFALUK ATOLL 341 



allied to L. taurina, it differs in the sctation of leg 4 and the shape of 

 the exopodite of leg 5. 



Two female specimens were obtained from a sand sample collected 

 some 340 feet from the reef margin at Falarik in the Ifaluk Atoll. 



Paralaophonte pilosoma, new species 



Figures 131/-/c, 134a,6, 135, 136a 



Material. — Loo. 638, 1 ad. cf , 0.47 mm. 



Description. — The folio wmg is based on the only male specimen 

 (holotype), which has been dissected and mounted. 



Adult male, total length 0.47 mm.; greatest diameter 0.12 mm.; 

 length of longest f ureal seta 0.38 mm.; proportional length of cephalo- 

 thorax and abdomen is 15:16. 



General shape of body elongated, cephalothorax and abdomen 

 indistinctly separate; greatest diameter at middle of cephalic somite, 

 very gradually tapering posteriorly and only very slightly dilated in 

 genital area (fig. 134a). Head and 1st thoracic somite fused; cephalic 

 somite 1% times longer than combined lengths of thoracic somites 

 2 to 4. Head broadly rounded anteriorly, incised at insertion of 

 antennules, rostrum with broad base, triangular with rounded apex 

 and very indistinctly incised at tip. Cephalic somite in lateral aspect 

 with rounded back, rostrum pointing forward and slightly downward, 

 separated from cephalic somite by shallow depression, as long as 

 1st antennular segment (fig. 136a). Sides of cephahc somite distinctly 

 produced to cover oral appendages; posterolateral corner produced. 

 Thoracic somites 2 and 3 of equal length, 4th slightly shorter. Epi- 

 meral plates of somites 2 to 4 cut off squarely. All thoracic somites, 

 includmg cephalic somite, distally bordered by fine hairs. 



5th thoracic somite distinctly visible dorsally and laterally, nearly 

 as long as 4th thoracic somite. Abdominal somites 1 to 4 of equal 

 length; 1st and 2nd separate, in dorsal aspect with slightly laterally 

 produced epimeral plates. All abdominal somites bordered distally 

 by short spinules, fornnng completely closed ring around somite. 

 Anal somite as long as wide, anal flap distinct, placed proximally, 

 haired, insertion of furcal rami also haired. 



Furcal rami cylindrical, proportion of length and diameter 11:5. 

 There are 5 marginal setae and 1 appendicular seta on each ramus, 

 marginal setae inserting close together at distal border, appendicular 

 seta at % length along internal border. Setae 1, 4, 5, and appendicular 

 seta short, setae 2 and 3 lengthened and thickened, especially 2nd, 

 which reaches % body length (fig. 1346). 



The occurrence of short hairs on the whole integument, including 

 the furcal rami, gives the animal a decidedly hirsute appearance; the 

 hairs on the cephalic somite are placed in small pits. 



