l62 



DISCOVERY REPORTS 



Occurrence: i. 

 2. 



3- 



4- 



5- 

 6. 



St. 87. South-east Atlantic. 4 <J<J 6-5-7 mm., 8 ?? (2 ovig.) 6-5-7 mm - 



St. 89. South Africa. 5 S3 5-8 mm., 1 ovig. $ 6-5 mm. 



St. 250. South Atlantic. 1 $ 6 mm. 



St. 256. South-east Atlantic. 1 $ 7 mm., 1 $ 8 mm. 



St. 257. South-east Atlantic. 3 ?$ 6-5-7 mm - 



St. 266. South Africa. 1 $ 6-5 mm., 2 $$ 6-7 mm. 



Remarks. As preserved the eye is red, and the whole head and mouth-parts are 

 tinged with a paler but brighter shade of red; the animals are consequently rather 

 distinctive and easily picked out from amongst a mixed lot. 



The telson varies considerably, even in specimens from the same haul. The apex be- 

 tween the lateral points may be convex, irregularly crenulate, or emarginate. In the 

 latter case the apex might be described as truncate with four short points separated by 

 notches. The lateral points themselves may be minutely notched or bifid. 



Except that the antennae are rather longer in the 6\ there appear to be no constant 

 sexual differences in the size of the eyes or the slenderness of the peraeopods. 



Nos. 3, 5, 6 from the lesser depths of 300-0 m. are night captures, so that there 

 appears to be a nocturnal upward migration. 



The 'Discovery' has taken ovigerous $$ in mid- winter (South Atlantic); this is in 

 contrast with the findings of other expeditions in which the breeding season seems to 

 be summer: September to February (cf. Schellenberg). 



Distribution. Atlantic, 36°N-36°S; Indian Ocean; Antarctic ('Gauss' winter 

 station). 



Genus Oradarea, Wlkr. 



Walker, 1903, pp. 40, 56. 



Shoemaker, 1930 (Studies Biol. St. Canada, N.S. v, no. 10), p. 81. 



After having written the account of the Discovery material and suggested the resur 

 rection of Walker's genus to receive the Antarctic 

 species which are quite distinct from the New 

 Zealand Leptamphopus , I saw Shoemaker's paper. 

 I am glad to see that, even without actual New 

 Zealand specimens, he has come to the same con- 

 clusion. 



I have to thank Miss Herriott of Canterbury 

 College, Christchurch, for some specimens of 

 Leptamphopus novae-zealandiae from the collec- 

 tion of the late Dr Chilton. While leaving the 

 full description of the species to some New 

 Zealand carcinologist, I give a few details and 

 figures (Fig. 95) in order to substantiate my contention that, contrary to Chilton's 

 opinion (1912, p. 489), the wide distribution of the New Zealand species has yet to be 

 proved. In my view it is strictly a New Zealand species. 



a o. d 



Fig. 95. Leptamphopus novae-zealandiae 

 (Thorns.), a. Head. b. Pleon segment 3. 



c. Dorsal view of tooth on pleon segment 1 . 



d. Integumentary sculpture. 



