66 NOTES ON TASMANIAN CRUSTACEA, ETC. 



the convex margin on the spine-row ; the molar tubercle is 

 large, and is crossed by about twenty lines of serrations ; its 

 inner edge is defined by a tuft of small spines ; the palp (fig. 

 12) has the second and third joints sub-equal in length ; the 

 basal joint is broadened distally, and has numerous strong 

 spines on its inner margin ; the second joint is fringed with 

 two rows of setae, especially towards the distal end, thus 

 forming a kind of sheath, into which the somewhat falcate 

 third joint can be bent ; this last joint is setose on the inner 

 margin, and ends in about nine spines, of which the inner four 

 are pectinate. 



The first maxillce (fig. 13) have the inner plates small and 

 furnished at the extremity with six plumose setas ; outer plates, 

 with about ten stout spines, more or less toothed on their 

 inner margins ; outer joint of palp fringed with about ten 

 toothed spines, and a corresponding number of short, simple 

 setse. 



Second maxillce (fig. 14) having the inner plate fringed with 

 about fifteen plumose setae on the inner margin — both plates 

 ending in fine setae. 



The maxillipeds (fig. 15) have the inner plates narrow, and 

 reaching considerably beyond the extremity of the first joint 

 of the palp, densely fringed with curved setae, which hide the 

 three short teeth at the apex ; outer plates almost reaching the 

 end of the second joint of the palp, also densely fringed round 

 the ends and inner margins with spines and plumose setae ; 

 palp densely setose. 



First gnathopoda (PI. iii., fig. 1) with the coxal plates rounded 

 and very short ; basos with numerous setae near the base on. 

 the lower margin and at the distal end ; the short ischium and 

 meros are also thickly furnished with setae ; the carpus is 

 nearly smooth on the upper margin, while the lower is con- 

 siderably rounded, and is densely fringed on the edge and on 

 both sides ; the propodos is broader than the carpus, the 

 distal half of the lower margin forming the oblique palm, which 

 is defined by a group of thiee or four strong, straight spines on 

 each side; the whole joint is furnished with tufts of short setae 

 on the upper, and numerous rows of long setae on the lower 

 margin, sides, and end ; dactylos, slender and curved. 



Second gnatho'poda, somewhat similar to the first pair, and 

 sub-equal in size with coxal plates, short and rounded ; gill, 

 large, not reaching to the meros ; basos, long, straight, and 

 with very few spines on the margins ; ischium and meros short, 

 the latter densely setose on its distal half; carpus nearly tri- 

 angular, with its lower margin produced downwards and 

 thickly setose ; propodos, tapering distally, the palm defined 

 by a group of four pairs of stout spines, the whole joint densely 

 setose ; dactylos, etout, minutely setose on the inner margin. 



