224 Transactions. 



concave. Superior antenna slightly longer than the inferior, both slender, 

 with many-jointed flagella. In the male the peduncle of each antenna 

 bears many tufts of very fine short hairs, as shown in fig. 2b. These are 

 not present in the female. The gnathopods of the male considerably 

 larger than those of the female, and the first gnathopod larger than 

 the second in each sex ; in the male the propod is large, widest at the 

 commencement of the palm, which is defined by 3 or 4 stout setules ; in 

 the female the propod is smaller and narrower and not widened distally. 

 Telson narrowing posteriorly, extremity with a shallow cleft dividing the 

 posterior position into two rounded lobes, margins quite entire and without 

 setae. 



Length, about 8 mm. 



Localities. — Otago Harbour ; Blueskin Bay ; Akaroa. 



The brood-plates of the female in this species are characteristic and 

 form an easy mark by which the species may be recognized. They are 

 oval in shape, widening somewhat distally, and the margins towards the 

 apex bear a number of very long setae, longer than the whole joint. These 

 setae show, on the basal portion, alternate light and dark bands, as indicated 

 in fig. 2f, in which only some of the setae are put in and only three of them 

 filled in in detail. 



Atyloides serraticauda Stebbing. 



Atyloides serraticauda Stebbing, 1906, p. 362 : Chilton, 1909, p. 627 ; 

 1912, p. 497. A. calceolata Chilton, 1912, p. 497, pi. ii, figs. 21-23. 



Atyloides serraticauda is a species widely distributed in Antarctic and 

 Subantarctic seas, and some specimens belonging to it were taken at Auck- 

 land Islands in 1907. Large specimens are well marked by the distinct 

 serrations on the anterior side-plates, the side-plates of the segments of the 

 pleon, and on the posterior margins of the lobes of the telson. In smaller 

 specimens these serrations are much less distinct. The species described 

 by me from the South Orkneys under the name of A. calceolata proves to be 

 without doubt a male of A. serraticauda. As stated in the original descrip- 

 tion, it resembles that species in nearly all characters, but differs in the 

 presence of calceoli on the lower surface of the peduncle of the first antenna 

 and on the upper surface of the peduncle of the second antenna ; the 

 gnathopods are also slightly stouter, and differ a little in shape from those 

 of the female. The arrangement of the calceoU on the antennae of the 

 male is similar to that described by Walker (1912, p. 600) for Apherusa 

 jurinei (M.-Edw.). 



Lembos philacantha Stebbing. 

 Leu/bos philacantha Stebbing, 1906, p. 598 ; 1910, p. 605. 



This species was taken by the " Challenger" Expedition in Bass Strait 

 at a depth of 71 metres, and described by Stebbing in the report of that 

 expedition. It has been taken since at different places on the Australian 

 coast. It has not hitherto been recorded from New Zealand, but I have 

 one specimen from the Chatham Islands that agrees well with Stebbing's 

 description and must be referred to his species. The relation of this species 

 to others of the genus found in the Southern Hemisphere requires investiga- 

 tion. 



