TANAIDACEA AND ISOPODA— TATTERSALL. 207 



Uropods (pi. II, fig. 9) reaching to about the level of the apex of the last abdominal 

 somite ; inner ramus not twice as long as broad, with about nine spinules on its margins ; 

 outer ramus nearly three times as long as broad, with three spinules on its inner 

 margin and five or six on its outer margin. 



Appendix masculina on the second pleopods of the male (pi. II, fig. 10) equal in 

 length to the rami, slightly curved and pointed in shape. 



Length of an adult female, 10 mm. ; of an adult male, slightly smaller. There are 

 no conspicuous sexual differences. 



Remarks. — Of the described species of the genus Cirolana, this species is most 

 closely allied to C. neglecta, Hansen. It agrees with this species in most of its 

 characters, and especially in the colour of the eyes, the form of the epimera and the 

 shape of the frontal plate and clypeus. The two species may be separated by the 

 difference in the shape of the eyes and of the last abdominal segment, and by 

 the difference in the second joint of the last four thoracic legs. In C. neglecta the eyes 

 are shorter than deep, viewed laterally, and have the upper margin strongly convex. 

 In C. j^ellucida the eyes, viewed laterally, are somewhat longer than deep, with the 

 upper margin straight. In C. pellucida the setae on the longitudinal ridge of the 

 lower side of the second joint of the last four thoracic legs are shorter and not so 

 numerous nor so closely set as in C. neglecta. I have not seen the latter species, but 

 nothing is mentioned in existing descriptions about the soft, semi-transparent character 

 of the integument, which is such a feature of C. pellucida. It gives the animal the 

 appearance of a deep-sea species. Both C. neglecta and C. pellucida are pelagic 

 species, and are undoubtedly very closely related. 



14. Cirolana canaliculata, n. sp. PL III, figs. 1-8. 



Occurrence. — Station 134, Spirits Bay, near North Cape, New Zealand, 11-20 

 fathoms, bottom fauna, twenty specimens (types). 



Station 135, same place, plankton, from 3 metres, three specimens. 



Description. — This species belongs to Hansen's " Sectio secunda " of the genus, and 

 is most closely allied to C. sidcata, Hansen. 



Body about three times as long as broad, microscopically scaled, without tubercles 

 or spines. Head without rostrum, but with a distinct rim marked ofFby a sub-marginal 

 furrow round the anterior end. Eyes rather small, pigment black, seen from the side 

 longer than deep, with the upper margin convex, the whole eye partly covered by the 

 coxae of the first free thoracic somite. 



Eirst free thoracic somite larger than any of the others ; the second the shortest ; 

 third, fourth and fifth successively longer ; sixth longer than seventh. The first five 

 free thoracic somites with a single distinctly impressed line or furrow running right 

 across the segment, rather nearer to the posterior margin than to the anterior ; the 

 sixth and seventh free thoracic somites with two such impressed lines. The coxae of 



VOL. III. 2 H 



