282 "TERRA NOVA" EXPEDITION. 



from Japan, but may be distinguished by its much shorter and more obtuse rostral 



plate. 



Distribution. — Known only from New Zealand. It has been recorded from Otago 

 and Lyttleton Harbours (Thomson) and Auckland Harbour (Tattersall). The present 

 records extend its known range in New Zealand, but emphasise the fact that it is a 

 littoral species not found far away from land. It is not an oceanic pelagic species in the 

 same sense as S. thompsonii. 



Sub-family GASTROSACCINAE, Norman. 



Genus ANCHIALINA, Norman. 



4. Anchialina typica (Kroyer). 



A. typica, Hansen, 1910, p. 52, pi. VII, figs. 2a-h. 



Occurrence. — Station 40, off Rio de Janeiro. One immature female, 3 ■ 25 mm. 



Genus GASTROSACCUS, Norman. 



5. Gastrosaccus australis, sp. nov. (PL I, figs. 7-9 ; pi. II, figs. 1-4.) 

 Occurrence. — North of New Zealand. Station 133, 135 and 136, over one hundred 



specimens, adult and immature of both sexes, 6-12 mm. 



Description. — A species of the G. spinifer group. Carapace with a very short 

 obtusely rounded rostral plate, much shorter than the eyes. Below and in front of the 

 rostrum is a prominent pseudo-rostral process, triangular and acute in dorsal view, 

 blunter in lateral view and somewhat recurved. No lobes or filaments on the posterior 

 margin of the carapace. 



Antennular peduncle with the basal joint longer than the sum of the two following 

 joints; two prominent spines on the outer margin of the second joint. 



Antennal peduncle extending to about one-third of the way along the distal joint 

 of the antennular peduncle. 



Antennal scale extending almost to the level of the distal margin of the second 

 joint of the antennular peduncle, about three times as long as broad, increasing in 

 breadth outwards, outer margin terminating in a strong spine, beyond which the apical 

 lobe of the scale does not project. 



Fifth abdominal somite with the median dorsal portion of the posterior margin 

 produced into a short linguiform process, which, viewed laterally, looks spiniform and 

 is recurved at the apex. 



Tarsal joint of the endopod of the third to the eighth thoracic limbs divided into 

 eight to twelve joints, nail feeble. 



Pleopods of the male agreeing in essential points with those of G. spinifer. Both 

 exopod and endopod of the second pair multiarticulate, but the exopod is slightly 

 shorter than the endopod and somewhat twisted. Exopod of the third pair greatly 

 elongate, the first joint moderately long, the succeeding eight joints quite short, tenth 



