176 BULLETIN OF THE 



notch) ; the carapace and chelipeds are less setose than in P. panamensis, 

 the anterior margin of the carpus not prominently toothed, and there is a 

 strong protuberance near the middle of the upper surface of the propodus. In 

 p. tuherculipes Lockington, the central part of the front is triangular and 

 deeply furrowed along the median line, the chelipeds and ambulatory legs are 

 knobbed so as to present " a mass of tubercles above." P. panamensis appears 

 to be near P. harbatus A. Milne Edwards, from the Azores, but in the latter 

 species the front is broader and the carpus more denticulated. 



Family GALATEID-ffi. 



Pleuroncodes monodon (M. Edw.) ? 



Compared with Milne Edwards's figure of P. monodon (Ann. Sci. Nat., 3°ser. 

 Zool., XVI. Plate XI. Figs. 6-9), the " Albatross " specimens present a more 

 obese appearance ; their greatest width is across the cardiac region, while in the 

 figure of P. monodon it is near the posterior end of the carapace ; the cardiac 

 area, too, in the examples before me, is sunk below the level of the rest of the 

 carapace, and the transverse piliferous lines are more broken at this point, as 

 well as on the gastric region, than appears to be the case in P. monodon, to 

 judge from the figure referred to. Unless these discrepancies are due to the 

 inaccuracy of Milne Edwards's draughtsman, the " Albatross " specimens belong 

 to a new species. 



16 males, 7 females. 



9 males, 14 females. 



2 males. 2 females. 



18 males, 11 females. 



Munida obesa, sp. nov. 



In this species we see an approach to the genus Pleuroncodes, as the sides or 

 latero-inferior walls of the carapace are somewhat swollen, so that they show 

 a little when the animal is viewed from above. The basal joint of the an- 

 tennae, too, is moi-e exposed from above than it is in the typical species of 

 Munida. The lateral rostral spines, or supra-ocular spines, are curved upward 

 more than the median rostral spine, and the three are nearly parallel, the 

 lateral spines reaching about half way to the tip of the median ; all three are 

 microscopically spinulose on their upper edge. There are two pairs of spines 

 on the anterior part of the gastric region in line with the lateral rostral spines. 

 Of these two pairs the anterior is the larger. There is also a longitudinal line 

 of spinules in the median line between the two pairs just spoken of. There 

 are, in addition to these, several small spines irregularly arranged on each side 

 of the gastric region. The cardiac area is somewhat sunk below the level of 



