i 9 7 



The outer marginal spine on the endopodite of the second pair of feet is placed 

 distinctly behind the proximal spine on the inner margin. The inner sub-apical spine is longer 

 than the two apical spines (Plate L1X, fig-. 10). 



The distal joint of the fifth pair of feet is considerably expanded at the middle and 

 bears a close resemblance to the distal joint of the fifth pair of Longipedia scotti. The curved 

 spine on the basal joint is furnished with a moderately long secondary spine near the base of 

 the inner margin (Plate LIX, lig. i i). 



Male unknown. 



This species resembles Longipedia corouata, in the number of spines on the distal end 

 of the anal operculum, but it can readily be separated from that species by the much shorter 

 median terminal spine. This spine is very little longer than the lateral spines. In Longipedia 

 coronata the median terminal spine is much longer and thicker than the lateral spines. The 

 absence of very small secondary spines on the anal operculum renders the separation of this 

 species from Longipedia scotti, and Longipedia rosea Sars, a matter of simplicity. 



Occurrence. — One specimen was found in the washings from dredged invertebrata 

 collected at Station 273 from a depth of 13 metres. 



Genus Canuella T. & A. Scott, 1S93. 



This genus is closely related to Longipedia and Sunaristes. It can be distinguished from 

 the former genus by the nearly equal length of the exopodite and endopodite of the second 

 pair of feet. It differs from Sunaristes by the presence of a well defïned suture traversing the 

 dorso-lateral surface of the genital segment of the female, by the exopodite of the mandible 

 palp being composed of a single large joint, and by the presence of a strong tooth on the 

 surface of the first joint of the endopodite of the second pair of feet of both sexes. 



One species was represented in the material collected by the 'Siboga' in the Malay 

 Archipelago. 



1. Canuella curticaudata (Thompson & A. Scott). Plate LXIV, figs. 1—6. 

 Sunaristes curticaudata Thompson & Scott, 1903, p. 256, pi. III, figs. 12—17. 

 Five females and one male were obtained from the washings from dredged invertebrata 

 collected at the following stations. 



Stat. 164, 32 metres, three females and one male. — Stat. 273, 13 metres, two females. 



The illustrations given in the Supplementary Report VII 'On The Copepoda', in Professor 



Herdman's 'Report to the Government of Ceylon, on the Pearl Oyster Fisheries of the Gulf 



of Manaar', were taken from a single immature specimen and are obviously rather unsatisfactory. 



The 'Siboga' females were quite adult, and the figures now given shew the perfect condition. 



The most conspicuous character that separates this species from any of the other known 



members of the genus, is the very short furcal joints. The inner marginal spine on each joint 



in Canuella curticaudata is placed very near the apex. Length -- female 1,27 mm., male .94 mm. 



The three species of Sunaristes that were described as new in the Report on the Ceylon 



197 



