119 



Carapace long, narrow, knobbed above with a very long thickbeak 

 beak cylindrical, horizontai, forming an elongated eone. truncated at 

 the end with two small spines at the very extremity, one on each side. 

 Inner aktenn. thickish, inserted in a deep groove, which xs tnangular 

 n front. Eyes with a short thick pedicel. Outer antenna. spnng. 

 L from the under side of beak just in front of the eyes eight- or 

 nine-iointed; the first joint elongated. somewhat bent. the second 

 not h^lf its eno-th; both furnished at the end with two or three 

 lonįt set. the other joints forn^ing a bristle. The outer ped. 

 pSpstogetheroccupying a square space ; first jomt very narrovvat 

 ?he baset the inner edge finely serrated ; second joint very long. s des 

 almost parallel, the end gradually pointed; third joint somewhat 

 pvriform, vvith a tooth at the tip. 



^\egs cylindrical, some of the joints slightly curved; claws long, 

 slishtlv curved, the inner edge with many closely-placed minute teeth. 



Tail (of femde) trapezoidal, hollowed in the middle ; the segments, 

 excepting the terminai, joined in one piece. 



A genus closely allied to Acanthonyx, Latr. 



Xenocarcinus TiTBERCūLATUS, White. 

 Carapace with nine tubercles above, placed in three transverse 

 lines. the centre one of the first line double one placed before the 

 othe^ ; the centre one of the third line also double ; the two placed 

 transversely; the greater part of the beak covered with minute 

 closely-placed hairs and scales ; two short lines of longer hairs on the 

 upper side above and before the eyes; two or three waved longi- 

 tudinal red lines on the posterior half of carapace, the mner one con- 

 tinued to before the eye. j r ^i, 



First pair of legs (in female) short, not reachmg to the end of the 

 beak ; the claws small, equal, and mmutely toothed. 



Hah. Long Island, Cumberland Group, Australia Caught m a 

 seine. Presinted to the Museum by J. B. Jukes. Esq., geologist 

 attached to the survey of H.M.S. Fly. . , . j- .. i,- 



This very interesti'ng form is described in the Appendix to his 

 Narrative of the Voyage. It will be figured - ^he forthcorning 

 Crustacea of the South Seas. in connexion with Sir J. O. Hosss 

 Voyage. 



Chorinus acanthonotus. Adams and White. List of Crust. in Brit. 

 Mus., Appendix, p. 123. 

 Carapace armed with four long spines. the two front o^es rather 

 close tigether at their bases, and directed a little forwards ; the two 

 hinderbifid; the fo.ks of the anterior hmder spine diverg.ng late- 

 rallv and those of the posterior divaricating longitud.nally ; three 

 spines on each branchial region. the anterior ^omteA forward. flat- 

 tenedhorizontally; ū.^ middle slender. curved backwards, upvvards 

 and outwards, with two sharp-pointed tubercles at its base directed 

 downwards; the posterior vvith two divancat.ng slender spmes di- 

 recTed backwards^ outvvards and upwards. Horns of the rostrum 



