64 ME, E. J. MIBRS OK THE IDOTEIDJ!;. 



darker aloug the line of the alimentary canal, with numerous 

 minute spots over the surface generally. Length of the larger 

 example about If inch (43 mm.). 



Loc. Gulf of St. Vincent, S. Australia (G. F. Angas). 



Two specimens are in the British-Museum collection : the 

 larger is a female, with ova ; the smaller, which is 1^ inch in 

 length (30 mm.), is a male. In the figure cited the anteunge 

 are incorrectly drawn, and the anterior legs are too much en- 

 larged. 



This remarkable species cannot, I think, be generically sepa- 

 rated from Idotea ; in its general form and tlie very small deve- 

 lopment of the coxal joints or epimera it is more nearly allied 

 to I. elongata than to any of the species with nniarticulate post- 

 abdomen. In both examples the suture separating the head from 

 the first thoracic segment is distinct at the sides ; in the smaller 

 it is even faintly traceable across the dorsal surface. 



Idotea Lichtensteinit. 



Idotea Lichtensteinii, Krauss, Die Siidafrik. Crust, p. 62, pi. iv. fig. 4 



(1843). 

 In this species the body is somewhat elongated, finely granu- 

 lated above, carinated longitudinally. The head is firmly encased 

 in the first thoracic segment, has its anterior margin three- 

 toothed, and has a somewhat deflexed blunt lobe on its upper 

 surface, which projects in the middle beyond the frontal margin. 

 The postabdomen is posteriorly somewhat conically contracted, 

 and is as long as the thorax is broad ; it has three sutures on 

 each side near its base, and its posterior margin is notched, with 

 the postero-lateral angles rounded. The antennules reach to the 

 end of the penultimate joint of the peduncle of the antennae, 

 which reach, when retracted, to the middle of the third thoracic 

 segment. Legs slender, compressed ; the first pair with the 

 penultimate and antepenultimate joints somewhat hairy; the 

 rest smooth, with a feeble tooth on the under edge of the penul- 

 timate joint. The epimera reach to the posterior margins of the 

 segments, to which they are articulated ; the three anterior are 

 narrow, and the three posterior broad and truncated. Length 

 rather more than 1 inch English (about 26 mm.), breadth nearly 

 7 lines (14 mm.). 



Cape of G-ood Hope ; Table Bay (in algse). 



I have seen no specimens of this specieS) which in many of its 



