286 DISCOVERY REPORTS 



Calyptopis stages of E. lougirostris are known, that this larva is of another species. It 

 came from south of New Zealand. I found one exactly similar to it at a station south- 

 west of Western Australia ; and later stages of the same species— three specimens with 

 one pair of setose and three pairs of non-setose pleopods, one specimen with four pairs 

 of setose and one pair of non-setose pleopods — at a station south-west of the Cape. Both 

 stations were in the warmer part of the sub-Antarctic zone ; adult and larval E. lougi- 

 rostris, and large numbers of -E. similis were taken at them. I suspect the unknown larvae 

 to belong to the latter species. The order of the appearance of the pleopods appears to 

 be the same as in E. lougirostris and E. spinifera. 



Illig (1930, pp. 504-7, figs. 183-190) described a series of later larvae from off the 

 west coast of South Africa and south of the Cape, all, as the surface temperatures show, 

 from the sub-tropical zone, as E. lotigirostris. I was convinced, because of the locality 

 from which they came, that they were E. spinifera, and have examined a number of them 

 (p. 294) and found them to be so. 



The larval stages of E. lougirostris and the numbers of each that I found are as 



follows : 



Calyptopis: Second ... ... ••• ••• 9 



Third 20 



FURCILIA : 



Stage I. With I pair of non-setose pleopods 16 



Stage II. With I pair of setose, 3 pairs of non-setose pleopods 6 



Stage III. With 4 pairs of setose, I pair of non-setose pleopods 2 



Stage IV. With 5 pairs of setose pleopods, antennal endopod unsegmented 5 



With antennal endopod segmented, 6 terminal spines on telson i 



Stage V. With antennal endopod segmented, 5 terminal spines on telson 2 



With antennal endopod segmented, 4 terminal spines on telson 3 



Stage VI. With antennal endopod segmented, 3 terminal spines on telson 5 



Stage VII. With antennal endopod segmented, I terminal spine on telson i 



These larvae were taken in the sub-Antarctic Zone south-west and south-east of the 

 Cape and south-west of Western Australia, 



Second Calyptopis (Fig. 39 a, h) 

 Description based on the examination of nine specimens, 2-o-2-i mm. long. 

 The carapace seen from the side is dome-shaped and has a high and abrupt dorsal 

 organ. Its lateral margins are sharply and deeply indented just behind the eyes and its 

 anterior margin is emarginate in the centre, so that the carapace from above, dis- 

 regarding its median posterior projection, has a cottage-loaf-like outline. The entire 

 margin is beset with strong denticles. The median posterior projection is strong and 

 usually curved upwards. 



The antennular peduncle is of two or three segments with no spine. The antennae, 

 mandibles, first and second maxillae and the first pair of thoracic limbs are present. The 



