TANAIDACEA AND ISOPODA— TATTERSALL. 209 



170° 45' E. -172° 18' E., plankton at the surface and down to 3 metres, about four 

 liundred specimens. 



Remarks. — I am unable to find any differences of specific importance between these 

 specimens and the description of Cirolana japonica by Hansen. The legs appear to be 

 somewhat stouter in general build, but the antennae, antennules, elypeus, coxae and 

 last abdominal somite agree very closely with Hansen's figures. The body and 

 appendages appear to be microscopically scaled, and under a moderately high power of 

 the microscope a regular arrangement of hexagonal markings can be detected. The 

 species does not appear to have been met with since Hansen described his single 

 specimen. Hansen regarded it as a pelagic species, and the present specimens 

 have the same habit. It is not unlike the species described and figured by 

 Filhol under the name of C. coold, but Filhol speaks of special hairs on the internal 

 face of the basal joint of the last four pairs of thoracic legs. There are no such 

 hairs on C. japonica, but they are characteristic of the group of species of the 

 genus to which C. borealis belongs, and to which, I presume, Filhol's species must 

 be referred. 



16. Eurydice subtruncata, n. sp. PI. Ill, figs. 9-17. 



Occurrence.— ^t&iioTiii 84, 85, 86, 89 (types), 92, 93, 106, 107, 109, 110, 111, 

 118, 120, 122, 126, 127, 128, 129, 130, 139 and 141, in the neighbourhood of Three 

 Kings Islands, between 35° 4'-34° 38' S., 171° 19'-172° 20' E., plankton at the surface 

 and down to 3 metres, about nine hundred specimens. 



Stations 133, 135 and 136, Spirits Bay, near North Cape, New Zealand, plankton 

 at the surface, about fifty specimens. 



Description. — General form in the female robust and dorsally much vaulted, body 

 about two and a half times as long as broad ; in the male, general form much more 

 slender and less vaulted, and the body about three and a half times as long as broad. 

 Whole surface of the body and appendages microscopically scaled. 



Eyes large, with pigment intense black ; there seems to be considerable variation 

 in the size of the eyes, which variation is not sexual ; I have found specimens which 

 otherwise do not diifer from one another, in some of which the eyes are much larger 

 than in the others, and consequently appear closer together. 



Clypeus (pi. Ill, fig. 16) and labium of the type found in E. truncata i^ovmavi), 

 the process of the clypeus, seen from below, covering only a small portion of the space 

 between the mandibular palps. 



Antennulae (pi. Ill, figs. 9, 10) exhibiting no marked differences between the 

 sexes, reaching the antero-lateral angle of the first free thoracic somite ; peduncle 

 with the third joint sub-equal to the second ; flagellum slender, with the first joint 

 considerably longer than the remaining four and furnished with long sensory hairs, 

 second joint longer than the third or fourth, terminal joint minute and furnished 



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