18 Some Crustacea of Natal 



1905. A., Coutiere, P, Maid, et Lace. Arch., vol. ii, pt. 4, p. 356. 



1908. A., Coutiere, Bull. Soc. Philom., vol. xi, no. 5, p. 2. 



1910. A., Kemp, Fisheries Ireland, 1908, p. 119. 



1911. A., de Man, Siboga-Exp., Alpheidse, vol. xxxixa 1 , pp. 133, 144, 



161, 172 (1915, pis. 1-3). 



Athanas grimaldii, Coutiere. 



1911. Athanas grimaldii, Coutiere, Bull. Oceanogr. Monaco, no. 197 



[de Man]. 

 1911. A. g., de Man, Siboga-Exp., vol. xxxixa 1 , p. 146. 



A specimen obtained in Durban waters by Mr. D. R. Boyce has a 

 carapace 6 mm. long, with pleon twice that length. It belongs to 

 that which de Man distinguishes as the nitescens-grouip, having "legs 

 of the first pair with the carpi and the chelae directed straight forward, 

 merus short," unlike the dimorphus-group, in which the carpi and 

 chelae directed backward fit in the elongate excavate merus. As, 

 however, is shown by de Man's own species, A. parvus, the merus in 

 the first group is not always particularly short. In the Durban 

 specimen it shows a comparative brevity . Here the larger chela of 

 the first pair is on the right, 6 mm. long, the merus half that length, 

 and the movable finger about half the length of the palm. The 

 finger's inner margin is crenulateand fringed with stiff setules opposed 

 to a similar fringe on the fixed finger over the tip of which it gently 

 curves. The left chela is much slighter, with the merus as long as the 

 palm. In the second pair the chela is rather shorter than the first 

 jointlet of the wrist, which equals the third, fourth and fifth combined, 

 the second and third equal one to the other and together to the fifth, 

 the fourth intermediate in length between the third and fifth. The 

 last three peraBopods have the microscopic tooth near the point of the 

 finger, discussed in de Man's footnote. 



Genus ALPHEUS, Fabricius, 1798. 

 See these Annals, vol. ii, p. 122. 



Alpheus rapacida, de Man. 



1908. Alpheus rapacida, de Man, Notes Leyden Mus., vol.xxx, p. 105. 

 1911. A. r., de Man, Siboga-Exp., Alpheidae, vol. xxxixa 1 , pp. 324, 

 394 (1915, pi. 20, figs. 91, 91a-f). 



