82 B. W. Knukel, 



distal end somewhat wider than proximal and provided with rather 

 long setae on ventral margin ; fourth joint rather long and slender, 

 cylindrical ; fifth joint shorter than fourth ; flagellum about as long 

 as fourth joint of peduncle, made up of 4 or 5 short, stout segments 

 which are provided with setae. 



Mandibles triangular, with principal and secondary cutting edges 

 denticulated, with 9 or 10 spines on spine row and with prominent 

 molar tubercle ; palp 3-jointed, first joint short and cup-shaped with 

 proximal end very narrow, second joint about 3 times as long as 

 broad, slightly broader distally and with rather long setae on inner 

 margin, third joint slightly shorter than second with rounded apex 

 which is provided with abundant setae. Lower lip with outer plates 

 having anterior margin entire. First maxillae having inner plate tri- 

 angular and with numerous setae on inner margin ; outer plate of 

 usual form with stout spines on oblique apex ; palp 2-jointed, of 

 which the first is about as long as wide and the second is some- 

 what curved and club-shaped with setae on rounded apex. Second 

 maxillae of usual form with plates rounded distall}'. Maxillipeds 

 with plates well developed and with 4-jointed palp ; inner plates 

 rectangular with distal margin provided with abundant setae and 

 a few spines ; outer plates extending nearly as far as distal end of 

 second joint of palp, with inner margin straight and armed with 

 broad toothlike spines and abundant setae, outer and distal margins 

 convex, distal margin with long setae ; palp with first joint short, 

 hardly as long as broad, second joint cylindrical, 3 times as long 

 as broad and with long and abundant setae on inner margin, third joint 

 2/3 as long as second with rounded apex having abundant setae, fourth 

 joint less than ^/2 as long as third with rounded apex as in third joint. 



In male, first gnathopods with moderate epimera having anterior 

 ventral angle only slightly produced and with ver}' short setae on 

 ventral margin ; second joint moderate in size, third joint rather 

 shorter than broad; fourth joint broader toward distal end than 

 proximal with posterior margin much longer than anterior and with 

 4 or 5 fascicles of setae ; wrist as long as second joint, subtriangular 

 with distal margin somewhat oblique, posterior margin with 5 or 

 6 fascicles of setae and with similar number of fascicles along axis 

 of joint; hand suboval, slightly broader than wrist, more than ^j^ 

 as broad as long, anterior and posterior margins slightly convex, 

 posterior margin passing by even curve into palm which is slightly 

 convex and provided with setae of various lengths, prehensile angle 

 with spine, posterior and anterior margins with numerous fascicles- 

 of setae ; finger long and moderately slender, serrated. 



