South African Crustacea. 237 



like the sixth, has considerable length and breadth. The 

 widened fourth joint and the strongly ridged palm of the 

 chelipeds are noteworthy features in this attractive species. 

 Locality. Off Umkomaas River ; depth 13 fathoms. A 852. 



GEN. CHARYBDIS, da Haan. 

 (See these Annals, vol. 6, p. 306, 1910.) 



CHARYBDIS VARIEGATUS (Fabricius). 



1798. Portunus variegatns, Fabi'icius, Suppl. Ent. Syst., p. 364. 

 1833-5. (Char i/Mis) variegatns, de Haan, Crust. Japon., decas 1, 



p. 10, decas 2, p. 42, pi. 1, 

 fig. 2. 



1899. Charyljdis (Goniosoma) varit'yatu , Alcock, J. Asiat. Soc. 



Bengal, vol. 68, pp. 50 

 (variegatum},60 (with 

 synonymy). 



The small specimen which I refer to this species is a male with 

 the carapace 13 mm. long by 20 mm. in extreme width. The 

 pleon has its second and third segments transversely keeled, the 

 composite third leading by concave margins to the sixth, which 

 has convex margins and is broader than long. According to 

 Alcock the front is cut into six rather pointed teeth (not includ- 

 ing the inner supra-orbital angle), whereas de Haau calls the 

 front 8-dentate, with obtuse teeth ; in our specimen the four 

 central teeth are not at all pointed. Further, as to the teeth of 

 the antero-lateral margins, while there is agreement as to the 

 size of the large hindmost tooth, Alcock speaks of the others 

 increasing in size from before backwards. It is proper, therefore, 

 to mention that in our specimen the first of the six lateral, though 

 much less sharp than those which follow, is as large as any of 

 the intermediate four, as appears to be the case in de Haan's 

 figure. 



Locality. Tugela River, 1ST.W. by N. 22 miles ; depth 47 fathoms. 

 A 581. 



GEN. PARATHRANITES, Miers. 



1886. Lupocyclus (Parathranites) , Miers, Rep. Voy. Challenger, 



Brachyura, vol. 17, p. 185. 



1899. Parathranites, Alcock, J. Asiat. Soc. Bengal, vol. 68, pt. 2, pp. 



7, 10, 16. 



