92 PROCEEDINGS OF THE ACADEMY OF [1894. 



branchial epipod is attached to the niaxilliped at its base, by means 

 of a slender stalk. 



The first guathopods are strongly chelate in both sexes, but 

 especially so in the males. The "thumb" of tlie propodite is ter- 

 minated by a horny tooth and external to and just within this is a 

 sharp-edged tubercle; the tooth of the dactylopodite bites between 

 these two. Figs. 6 and 6a, Plate V, show the guathopods of male 

 and female side by side and give a better idea of their appearance 

 than can be gained from a description . 



The limbs of the first free segment of the perseon are long 

 and slender, their terminal claws being but slightly curved. The 

 two succeeding paii's are stouter, with the dactylopodite and 

 claw shorter than iu the first pair. The last three pairs are still 

 stouter, the dactylopodite bears a strongly hooked claw with a comb- 

 like series of minute curved teeth on each side and the distal end of 

 the projjodite bears a row of stout setaj. All the limbs except those 

 of the first free segment have the distal end of the carpopodite crowned 

 with a few stout spines, some bifid, others serrulate. 



Only the anterior three segments of the pleou bear limbs (pleo- 

 pods). Each of these consists of a flat basal piece (protopodite) to 

 which are attached two one-jointed blades furnished, on their outer 

 edges, with long pinnate seta?, the exopodite bearing about 35, the 

 endopodite about 15. Both protopodite and endopodite bear a single 

 stout seta on their inner edge. 



The last segment bears a pair of four-jointed setose limbs (uro- 

 pods), the segments of which are cylindrical and increase in length 

 from l)ase to tip. 



The marsupia of the female are thin walled pouches attached 

 to the ventral wall of the sixth thoracic segment (fourth free seg- 

 ment). They increi\se in size with the development of the eggs and 

 in some specimens extend over segments five and seven, to which, 

 however, they are not attached. 



The largest specimens collected measure from rostrum to tip of 

 pleon 4-7 mm. and in width 1*4 mm. The ground color in alcoholic 

 specimens is pale yellow. Upon the carapace this is heavily mottled 

 with brownish pigment, excepting over about thirty elliptical and 

 sub-elliptical areoltc symmetrically arranged towards the middle line. 

 The dorsal surfaces of the chelie are similarly marked. The portion of 



