146 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



Sternal fui'ca situated between, and slightly posterior to, bases of 

 maxillipeds. Base of furca short, irregular; tines appear to arise 

 separately from base. Tines with flat, chisel-shaped tips and thick- 

 ened lateral margins (fig. 2k). 



First thoracic leg biramous though endopodite present only as 

 minute, lobate process at junction of exopodite and protopodite. 

 Protopodite one-segmented, proximal end rounded, with small pro- 

 jection from middle of proximal surface and large projection from 

 outer lateral surface forming articular surfaces. Inner surface of 

 protopodite with numerous minute projections giving rough appear- 

 ance to region. Exopodite two-segmented; first segment slightly 

 shorter than combined lengths of protopodite and second exopodite 

 segment, with small spine at distal outer corner of segment and short, 

 stiff setules along inner margin. Second segment of exopodite with 

 three terminal spines, outer two of approximately equal length, 

 innermost shorter, strongly curved. Middle spine indistinctly bifid 

 at tip. Three plumose setae on inner lateral margin, all with stiff 

 setules on proximal region (fig. 3a). 



Second thoracic leg biramous. Protopodite two-segmented; first 

 segment short, narrow proximally, broad distally. Second segment 

 of protopodite broad, width about three-fourths length ; length of sec- 

 ond segment greater than two and a half times that of first segment. 

 Exopodite three-segmented; first segment longer than combined 

 lengths of second and third, with single, strongly developed spine from 

 outer distal corner. Spine on first segment projecting across surface 

 of second segment; fine membranes present on both inner and outer 

 margins of spine. Second segment short, irregular, with strong spine 

 from outer distal corner; spine projecting across surface of third 

 segment, with fine membranes on both inner and outer margins. 

 Lateral and distal margins of third segment continuous, segment 

 with broadly rounded outline. Third segment with two spines on 

 outer margin; first spine short, simple, second well developed, with 

 membrane along inner margin. Endopodite three-segmented; first 

 segment short, outer margin with slender setules on proximal region, 

 stiff setules on distal region. Second segment longer than first or 

 third, with row of toothlike projections along outer margin of right 

 leg, knoblike projections along outer margin of left (figs. 2>c,d). Third 

 segment short, broadly rounded (figs. 3b-d). 



Thu'd thoracic leg biramous. Protopodite broadly flattened, plate- 

 like, with cluster of toothlike projections along outer surface and on 

 inner proximal surface. Exopodite two-segmented; first segment 

 irregular, with two-parted, hooklike process at junction of first 

 segment and protopodite. Second part of hooklike process directed 

 inward at sharp angle to first part. Second segment of exopodite 



