TRAPEZIA FERRUGINEA. 179 



are provided only with a very rudimentary blunt pro- 

 minence, placed comparatively more forward than the 

 acute lateral tooth of cymodoce and further the upper 

 margin of the hands is more rounded , less cristate and 

 their outer surface is quite smooth , not hairy as in the 

 species described by Heller. For the rest the two species 

 present a very great resemblance. The frontal teeth are 

 more or less shaped as in cymodoce , but the median teeth 

 are mostly a little broader and the external ones have an 

 oblique outer lateral margin ; the internal angles of the 

 orbits are however less prominent than the front, are di- 

 rected obliquely outwards and rounded. The upper part 

 of the inner and outer surface of the hands, as also the 

 upper surface of the wrist and of the arms are somewhat 

 minutely punctate , but for the rest quite smooth ; in 

 some specimens the hands are of the same size, in others 

 they are unequal , as in the adult male , the left hand 

 of which is the larger. The arms project very much be- 

 yond the lateral margins of the carapace, and their ante- 

 rior margins are armed with four or six small teeth , quite 

 as in Trap, cymodoce \ the inner angle of the carpopodite 

 is blunt and the two or three last joints of the ambula- 

 tory legs are provided with some hairs. Our specimens 

 preserved in spirits , are very diversely coloured ; in some 

 the carapace is of a bluish gray colour, in others of a 

 reddish brown or reddish gray or sometimes of a fer- 

 rugineous colour. 



The breadth of the carapace of an adult male is 13^2 mm., 

 of the largest female specimen 18 mm. 



The Museum received also a young female specimen, 

 from New-Caledonia, presented by Mr. Alph. Milne Ed- 

 wards under the name of Trap, cymodoce Herbst ; it agrees 

 however quite with our specimens, so that Trap, cymodoce 

 A. Milne Edwards (Nouv. Arch, du Mus. t. IX , pag. 260) 

 is identical with Trap, ferruginea Latr. The latter species 

 has therefore as extensive a geographical distribution as 

 Trap, cymodoce Herbst. I also presume Ti^ap. areolata (var. 

 Notes from tlie Leyden Miiiseum , Vol. 11. 



