Species o/" Micippa and Paramicippa. 9 



Micippa spinosa, var. affinis. 

 Paramicippa affinis, Miers, Ann. & Mag. Nat. Hist. (ser. 5) iv. p. 13 

 (1879). 



Of this variety, described by me as a distinct species in 

 1879, from a single female from Bass's Straits, found among 

 the fishes of H.M.S. * Challenger,' there are, among the 

 • Challenger ' Brachyura, two males, also from Bass's Straits, 

 taken off E. Moncceur Island (Station 162), in 38 fathoms. 



It is distinguished by the absence of well-developed spines 

 from the dorsal surface of the carapace, which are represented 

 sometimes by elevated granules or small tubercles, by the form 

 of the front, which does not widen to the distal extremity 

 (but has parallel lateral margins) and has a very small 

 terminal notch, and by the smoother basal antennal joint. 

 Length of carapace to base of rostrum (in an adult male) 

 6 lines (12'5 millim.) ; breadth of carapace 5h lines (11*5 

 millim.) ; length of a chelipede about 7 lines (15 millim.), of 

 first ambulatory leg about 74 lines (16 millim.). 



This variety, together with the typical Micippa spinosa, 

 will be figured in my Report on the Brachyura of the • Chal- 

 lenger' expedition. 



Micippa curtispina. 



Micippa curtispina, Haswell, Proc. Linn. Soc. N S. Wales, iv. p. 446, 

 pi. xxv. fig. 1 (1880) ; Catalogue Australian Stalk- & Sessile-eyed 

 Crustacea, p. 25 (1882). 



This remarkable species is allied to M. affinis, but distin- 

 guished by the form of the rostrum, which is vertically deflexed 

 and curves inwards towards the distal extremity, which is emar- 

 ginate, and by the slender chelipecles, whose merus-joints 

 are more strongly carinated above at the distal extremity. 



In the specimens in the Museum collection which I refer to 

 thisspecies, the rostrum is considerably thickened and the lateral 

 distal lobes are obsolete, or nearly obsolete, so that the lateral 

 margins converge uninterruptedly to the emarginate apex. 

 The postocular orbital tooth is very small ; the pterygosto- 

 mian regions are turgid ; the basal antennal joint is granulated, 

 and the following joint is not, or is but very slightly, dilated • 

 the merus of the exterior maxillipedes is small, and its antero- 

 external angle less broadly rounded than in M. affinis • the 

 distal carina of the merus of the chelipedes, both in the larger 

 female and smaller male, is entire, not dentated ; palm very 

 slender, and fingers nearly straight, with scarcely any inter- 

 marginal hiatus. The larger (female) specimen has the fol- 

 lowing dimensions : — Length of carapace to base of rostrum 

 10 lines (21 millim.), breadth about 7^ lines (15 millim.) • 



