15° 



the apex. They are not pointed as in Phyllopus bidentatus or Phyllopus impci7- (Plate XLVI, 

 figs. 3 and 4). 



The combined length of the abdomen and furca is equal to half of the total length 

 of the cephalothorax, from the frontal margin to the distal end of the last thoracic segment. 

 The genital segment is slightly longer than the combined length of the second and third seg- 

 ments. It is somewhat cylindrical in outline, and appears very nearly symmetrical when seen 

 from above. The dorsal surface is flatly rounded when viewed from the side (Plate XLVI, 

 figs. 3 and 4). The furcal joints are twice as long as broad. Each joint is slightly longer than 

 the anal segment. 



The antennules are twenty-four-jointed and reach to the middle of the genital segment. 



The antennae, mandibles, maxillae and maxillipedes are similar to those of Phyllopus 

 bidentatus. 



The four pairs of swimming feet are also similar to those of that species. 



The fifth pair of feet resembles that of Phyllopus bidentatus but the last two joints of 

 the exopodite are proportionally wider (Plate XLVI, fig. 6). 



Male unknown. 



This species appears to be identical with the form described and illustrated as Phyllopus 

 bidentatus by Giesbrecht. It differs from Brady's species, however, by the nearly symmetrical 

 prolongations of the last thoracic segment, and by their narrowly rounded apex when viewed 

 from the side. The figure given by Esterly (1905), and also some of those shewn by van 

 Breemen (1908), evidently represent this Phyllopus. 



Occurrence. — Three females were obtained from the plankton collected with the 

 Hensen vertical net at the following stations. 



Stat. 203 (1500 metres to surface), two specimens. — Stat. 276 (750 metres to surface), one 

 specimen. 



17. Family Candaciidae. 

 Genus Candacia Dana, 1846. 



This genus is at present the only known representative of the family, but it contains 

 a considerable number of species. The species are distinguished chiefly by the form of the last 

 thoracic segment, and by the structure of the fifth pair of feet of the two sexes. 



Twelve species were obtained from the plankton collected by the 'Siboga' during the 

 investigations conducted in the Malay Archipelago. One of the species does not appear to 

 have previously been described. 



1. Candacia aethiopiea (Dana). 



Candace aethiopiea Dana, 1849. p. 23. 



Candace melanopus Claus, 1863, p. 191, pi. XXXIII. 



Candace aethiopiea Giesbrecht, 1893, p. 424, pis. 4, 21, 22 & 39. 



