M A I I D E A. gg 



at base; third joint of second pair much shorter than carapax, tarsus 

 but slightly shorter than preceding joint ; fourth joint of eight poste- 

 rior feet flattened on upper side and smooth; third joint of outer 

 maxillipeds anteriorly entire. 



Plate 1, fig. 3 a, male, natural size; b, view of carapax from behind; 

 c, under view, showing mouth and inner antennae magnified two dia- 

 meters ; d, male abdomen, natural size. 



Dredged up in thirty fathoms water, off the eastern coast of Pata- 



gonia. 



Length, two and three-eighths inches ; greatest breadth (excluding 

 spines of sides), two and one-eighth inches; length of beak anterior 

 to line of tips of orbital acanthi, three lines; distance between tips 

 of orbital acanthi, five lines ; length of second pair of legs, four and 

 five-eighths inches; length of first pair, three and three-fourths 

 inches. 



This species differs from the figure of the L. granaria in the length 

 of the beak and legs. The beak anterior to the orbital acanthi is 

 much shorter than the distance between the acanthi, while the two 

 distances are equal in the figure of the granaria; moreover, the dis- 

 tance from the tip of the third basal joint of the exterior antennae to 

 the tip of the beak is but little longer than this third joint, while it is 

 more than twice this distance in the granaria as figured. The third 

 joint of the second pair of legs is much longer than the carapax in 

 the granaria, and much shorter in our species. 



The carapax is covered with numerous spinous tubercles, the largest 

 of which are the cardiac, and one postero-lateral on either side. Below 

 and behind the last-mentioned spine there are several other promi- 

 nent spines. On the median region there are three rows, as in the 

 granaria, the inner containing three spines, and the outer two, with 

 perhaps another, quite small, intermediate. There is a broad spinous 

 tubercle on the autero-lateral region. The narrow space between the 

 median region and the cardiac spine is depressed, being bordered with 

 a curving ridge, convex inward, which is set with three or four small 

 low spines. 



The granules of the legs are half smaller than in the figure of the 

 granaria. The outer angle of the basal joint of the outer antennae is 



23 



