574 MB. L. A. BOBBADAILE ON CBUSTACEANS [May 22, 



those of the anterior ; chelipeds much larger than the last three 

 legs, nearly as long as the rostrum ; fingers shorter than the palm, 

 fairly stout, enclosing a space at the base, with interlocking teeth 

 at the tip ; moveable finger with an isolated blunt tooth near the 

 proximal end ; walking-legs with the joints irregularly swollen ; 

 dactyles somewhat sickle-shaped, bearing spines and a few hairs 

 below." 



The third maxilliped and the abdomen of the male are shown in 

 figs. 1 a and 1 b. 



Colour in spirit, white. 



Total length 13 - 5 mm. Length of carapace to base of rostrum 

 S - 5 mm. Greatest breadth 7 mm. 



Funafuti ; one male. 



Genus MexjEthius H. M.-Edw., 1834. 



8. Men^thius monocebos (Latr.), 1825. 



Pisa monoceros, Latr. Encycl. x. p. 139 (1825). 



Mencethius monoceros, H. M.-Edwards, H. N. Crust, i. p. 339 

 (1834) ; Alcocb, J. As. Soc. Beng. Ixiv. 2, p. 197 (1895). 



Mencethius angustus, dppressus, subserratus, tvberculatus, areolatus, 

 and inornatus, Dana, U.S. Expl. Exped., Crust, i. pp. 121-125, 

 pi. iv. figs. 5-7 & pi. v. figs. 1-3 (1852). 



Funafuti ; two males. 



The carapace in both specimens has the tubercles low and rounded 

 but fairly numerous. 



Subfamily Pianos. 

 Genus Htastenus White, 1847. 



9. Htastenus elegans Miers, 1886, var. (Plate XL. fig. 2.) 



Hyastenus elegans, Miers, ' Challenger ' Brachyura, p. 58, pi. vi. 

 fig. 3 (1886). 



The specimens differ from the type in the following parti- 

 culars : — 



1. The horns are more slender and set wider apart at the base. 



2. The larger tubercles of the carapace are more rounded ; not 

 so sharp. 



3. The arrangement of tubercles in the fore part of the carapace 

 is somewhat different (see figure). 



Should it be thought advisable to give this variety a name, that 

 of tenuicornis would be suitable. 

 Rotuma ; two males, one female. 



Genus Tylocabcinus Miers, 1879. 



10. Tilocaecinus styx (Herbst), 1803. 



Cancer styx, Herbst, Xaturges. Krabb. u. Krebse, iii. 3, p. 53, 

 pi. lviii. fig. 6 (1803). 



