53 
GENUS IBACUS. 
Carapace broader than long, with a deep and narrow notch 
atthe side. Eye-sockets near the middle line. 
Ibacus verdi. 
A single specimen of this species has been taken off East 
London. It was known previously from the Atlantic and 
Eastern Indian Oceans. | 
' Length, 4-5 inches. 
Reddish. 

Other South African Crustacea of use to man as food, 
bait. eee. : 
: Peneus monodon. 
Penaeus caeruleus (Fig. in Marine Investg. S.A. Vol. 
4, pl.2t). , 
Penaeus semisulcatus. 
Penaeus japonicus. 
Penaeus canaliculatus. 
Penacopsis monoceros. 
All these prawns occur from Natal or Algoa Bay up to 
Delagoa Bay. 
The commonest shrimp, occurring from Mossel Bay up to 
Natal, appears to be Macropetasma africanus. Also several 
species of Leander. 
Cracker-shrimps in Natal and elsewhere : 
Alpheus crassimanus. 
Other large-clawed Crustaceans from False Bay, etc.: 
Upogebia capensis. 
Callichirus krausst. 
Burrowing in the sand in Natal: 
Hippa (Emerita) emeritus. 
fC.P. 3—1918] 
