182 



The fifth pair of feet of the female is symmetrical. The exopodite is one-jointed. The 

 : of the joint terminates in three spines. The inner spine is distinctly longer than the other 

 two. It is distinctly plumose. The distal portion of the outer margin of the joint is furnished 

 with one outer edge spine (Plate XLVIII, fig. 18). 



Length of female, 1,34 mm. 



The inner margin of the second joint of the basiopodite of the left side of the male 

 fifth pair is much inflated. The inflated part is broadly rounded and is fringed with fine spines. 

 There is no tooth as in Calanopia minor, or Calanopia americana. The second joint of the 

 left exopodite is equal to two-fifths of the length of the first joint. The first joint of the 

 exopodite of the right foot is moderately broad. The thumb-like projection is well developed. 

 The palm is simple. The claw-like second joint is spoon-shaped. It has no marginal tooth 

 (Plate XLVIII, fig. 20). 



Length of male, 1,12 mm. 



The apical portion of the second pair of maxillipedes of both sexes is composed of four joints. 



Calanopia aurivillii approaches Calanopia americana in the structure of the female 

 fifth pair of feet, but there is a noteworthy difference in the proportional length of the spines 

 on the apex of the exopodite. The distinctions between the female fifth pair of Calanopia 

 americana, Calanopia aurivillii, and Calanopia minor, are readily seen on comparing the figures 

 given on Plate XLVIII. 



Cleve's type specimens were obtained from plankton collected in the Malay Archipelago 

 in 1 899. The illustrations given in this report are from specimens found in plankton collected 

 by Professor Herdman in the vicinity of Galle, Ceylon, in 1903. 



19. Family Parapontellidae. 

 Genus Bathypontia Sars, 1905 (£). 



This genus was established by Professor G. O. Sars in 1905 from a female specimen, 

 and placed provisionally in the family Parapontellidae owing to the similarity in the structure 

 of the first pair of maxillipedes with that of the genus Parapontella. The other appendages, 

 however, are quite distinct, and the abdomen of the female is composed of four segments. 



G. P. Farran (1908), gives a very short description of the male, with an illustration 

 of the right antennule and of the fifth pair of feet. 



The rostrum is a moderately strong, cylindrical, and slightly curved process. There is a 

 very slight tracé of bifurcation at the apex. The exopodites of the four pairs of swimming feet 

 are three-jointecl. The endopodite of the first pair of feet is two-jointed. The endopodites of the 

 second, third and fourth pairs of feet are three-jointed. The fifth pair of the female is small. 

 There is no endopodite. Each foot consists of two free joints attached to a one-jointed basal 

 part. The right antennule of the male is modified for grasping. The distal hinge joint is strongly 

 arched. The male fifth pair is very indistinctly prehensile. 



1S2 



