Contributions to tJte Crustacean Fauna of South Africa. 343ft 



stout, with equal, sub-cheliform hands." Nor are the " eyes red." 

 The description of the abdomen, however, agrees well, and the " few 

 crimson spots on the extremities " of the body might be construed 

 in harmony with the colouration of the present species. Hilgendorf 

 (Monatsber. Berl. Ak. Wiss. 1878, p. 847), refers Stimpson's 

 A. lacvigata and A. punctata to the genus Paranthura. 



It is also very near to Apanthura sandalensis, Stebbing (Willey's 

 Zool. Res. pt. 5, p. 621, pi. 65 A.), from the Loyalty Islands. In fact 

 the only difference is that A. dubia has the inner apex of 5th joint of 

 first peraeopod (gnathopod) bluntly truncated and a pointed lobe at 

 base of the palm of 6th joint, whereas in A. sandalensis the apex of 

 5th joint is pointed and the palm is plain. In A. dubia the lateral 

 margins of the telson are proximately slightly concave, in A. sandal- 

 ensis straight ; but this is hardly a point of importance. 



MESANTHUKA, n. g. 



Very near Apanthura but distinguished by the complete fusion of 

 the pleon segments without any trace of segmentation, and the man- 

 dibular palp having the 3rd joint longer than 1st. 



Maxilliped 5-jointed (including basal joint). 



Peraeopods 4-7 with 5th joint underriding 6th as in anterior 

 peraeopods, but not to such an extent. 



Flagellum of 1st antenna in $ enlarged, multiarticulate, densely 

 setose, in $ rudimentary. 



Plagellum of 2nd antenna rudimentary in both sexes. 



MESANTHUEA CATENULA (Stimpson). 

 (Plate XXIX. A.) 



1855. Antliura catenula, Stimpson, Proc. Ac. Nat. Sci. Philad. 



vol. 7, p. 393. 

 1887. ,, Beddard, Challenger Eep. vol. 17, p. 143 



(note). 

 1910. Stebbing, Gen. Cat. S.A. Crust, p. 420. 



Body smooth, glabrous. Head % length of 1st peraeon segment, 

 anterior margin excavate, with the median process not extending 

 beyond the antero-lateral angles ; eyes oval, black. Peraeon seg- 

 ments subequal. Pleon segments 1-5 completely fused in both 

 sexes, the only indication of the composite nature being very faint 

 lines of pigment, no trace of any grooves. Telson with slightly 

 sinuous sides, apex subacute, rounded, setose, 



