286 MR. G. p. PARRAN ON COPEPODA 



The characters which distinguish this species from C. gibbula 

 are the proportionately greater length and different form of the 

 abdomen and the shorter 3rd thoracic spines. 



Only one specimen was found. 



CoRYCELLA coNCiNNA Dana. 



In five gatheinngs, about 30 specimens. 



Giesbrecht (10) has given a figure of the female of this species 

 liy which it can easily be recognised, but he does not i-efer to the 

 presence of a setose pad, as in C. gibbula, on the antero- ventral 

 part of the abdomen. 



Distribution. Widely distributed in the Indian Ocean, Tropical 

 and South Pacific. 



OORYCELLA CARINATA Giosbr. (PI. XI. fig. 10.) 



In five gatherings, 55 specimens. 



Length of females '85 mm. 



The characteristic features of this species are the cephalon (deep 

 from front to back), the small eyes moderately far apart, the long 

 slender thoracic spines, and the abdomen, widest at its anterior 

 fourth (excluding furca), with a ventral setose pad. The furca is 

 about half as long as the rest of the abdomen. 



CoRYCELLA CURTA, Sp. n. (PI. X. figS. 7-11, PI. XI. figS. 1-6.) 



Female (PI. XI. figs. 1, 2).— Length "7 mm. Very close in 

 general appearance to G. carinata, bvit may be distinguished by 

 the more slender build in lateral view, by the shorter thoracic 

 spines, which do not reach as far as the genital openings, and by 

 the absence of the patch of fine setfe or spinules on the antero- 

 ventral part of the abdomen. 



The furca is short, about 2x7, and contained 2| times in the 

 length of the rest of the abdomen (PI. XI. fig. 3), which is 

 broadest at its anterior fourth and tapered posteriorly. 



The appendages have no special features. The fine serrulation, 

 found on the third joints of the exopods in some species, is absent 

 (PI. X. figs. 7, 8). The 2nd basal of the fourth foot (PI. X. fig. 11) 

 is rounded on its inner face, and does not form one straight line 

 with the inner face of the 1st basal. The angle between the 

 base and inner margin of the 2nd basal is slightly obtuse. 



Only one specimen was found. 



In the same gathering there occurred two specimens which 

 seem to be the males of the above, on account of the similarity of 

 their thoracic spines, fourth feet and furca, and their small size. 



Male (PI. XI. figs. 4-6). Length '65 mm. Cephalothorax in 

 middle line "4 mm., abdomen and furca '24 mm. The form of 

 the abdomen (PI. XL fig. 4) is more easily shown in the figure 

 than described. The outer edges of the 3rd joints of the exo- 

 podites of 1st and 3rd feet are not serrulate. The angle between 

 the base and inner margin of the 2nd basal of the 4th foot 

 (PI. XL fig. 5) is slightly obtuse. 



