South African Crustacea. 463 



and fifth peraeopods, so far as cau be judged from the figures in the 

 " Challenger " report. In our specimen the two lobes of the well- 

 produced front are contiguous instead of presenting a deep concavity, 

 nor is there anything corresponding to the lobe on either side " directed 

 almost vertically upwai'ds." The pleon of the female is devoid of the 

 overlapping lateral processes found in E. frontalis. On the other 

 hand, there are many points of agreement with that species : the 

 produced front, making the length of the carapace greater than the 

 breadth, the sulci of the female meeting in a tubercle between 

 the bases of the chelipeds, the scarcely projecting eyes (of which the 

 figure shows the peculiar shape and feeble cornea), the large first 

 antennae, and the character of the nearly similar second and third 

 peraeopods contrasted with the dwarf-fingered two following pairs. 

 The carapace shows strong depressions postero-laterally for the recep- 

 tion of the hinder peraeopods. Its gi'eatest breadth is 12 mm., with 

 median length 13 mm. 



Locality. Seal Island, N.W. ^ W. 7 miles ; depth 19 fathoms. 

 A 813. 



MACRURA. 



TRIBE PENAEIDEA. 



FAMILY PEN A El DAE. 



GEN. PENAEUS, J. C. Fabricius. 



PENAEUS LONGICORNIS (Olivier). 



Plate CXV. 



1825. Palaemon longicornis, Olivier, Encyl. Mcth., vol. 10, p. 662 



[M. Edwards]. 

 1837. Penaeus indie us, M. Edwards, Hist. Nat. Crust., vol. 2, p. 415. 



This species has been already discussed in the 'Annals of the 

 Durban Museum,' vol. 1, pt. 5, p. 443, under the heading of 

 P. indicus var. longirostris, cle Man. It now seems to me that 

 de Man's longirostris is the original P. indicus, as shown by the 

 resemblance to Olivier's longicornis which Milne Edwards specifies. 

 As in that case the varietal name must be dropped, the acceptance 



