200 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



process more than twice length of outer, with fine membrane along 

 inner and outer margins. Outer terminal process without membranes 

 (fig. 15m). 



Maxilliped of female and male two-segmented, attached medial and 

 slightly posterior to maxilla. First segment well developed, with 

 proximal extension of inner surface forming articular surface. First 

 segment tapered from wide proxmial to somewhat narrower distal 

 region. Distal surface irregular, with heavily chitinized indentations 

 for articulation with second segment. Second segment short, with 

 strongly developed, curved, clawlike terminal process. Second seg- 

 ment with flat, lobate process and simple, spinelike process as acces- 

 sory structures. Lobate accessory structure with minute, toothlike 

 denticulations on distal surface. Spinelike accessory structure 

 attached just proximal to middle of base of lobate accessory structure. 

 Inner surface of curved terminal process flat, with very slight denticu- 

 lations. Division between segment and terminal process indistinct 

 (fig. 15n). 



Sternal furca of female and male located between, and slightly 

 posterior to, bases of maxillipeds. Base of furca heavily chitinized 

 oval structure; center of base depressed, not heavily chitinized. 

 Bifurcate process single, arrowhead-shaped unit, distinct from oval 

 base, attached to base at proximal end. Furcal tines widely spread, 

 with even concave depression between blunt tips; lateral margins 

 curving medially to attachment with base. Two medially curving 

 ridges present posterior to sternal furca (fig. 15o). 



The arrowhead-shaped furcal process is absent in one of the paratype 

 specimens (USNM 105100); the only structure present is the heavily 

 chitinized oval base. In addition, both postoral processes either have 

 been lost or have developed irregularly, since only a simple, blunt, 

 spinelike process is present. This variation may lead to taxonomic 

 difficulties in later work as there is no evidence of the loss of these 

 two processes in the specimen. 



First thoracic leg biramous though endopodite reduced to rudi- 

 mentary, lobate process at junction of exopodite and protopodite. 

 Protopodite one-segmented, with slight projection of outer proximal 

 portion forming articular surface; single, lightly plumose setule present 

 on inner proximal lateral margin. First segment of two-segmented 

 exopodite slightly longer than protopodite, proximal and distal margins 

 irregular, outer distal corner with projecting heavily chitinized knob 

 and simple spinule. Second segment of exopodite pahn-shaped, 

 proximal and inner margins continuous, irregular, distal margin with 

 three spines and plumose seta. Outermost spine lightly denticulate 

 distally, inner two spines shorter, with small concave depression on 



