148 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



postantennal process (fig, 55c) situated lateral to antenna base, con- 

 sisting of elongate, spine-shaped projection and 3 nodides, 2 on base 

 of projection, thh*d slightly posterior to base, each with several hair- 

 like projections. Male postantennal process similar to that of female 

 except spine-shaped projection longer. Female and male postoral 

 process (fig. 55c) spine shaped, proximal end broad, medial region 

 narrow, distal region expanded, flattened. Female and male 

 maxillule (fig. 55c) consisting of pseudosegmented node bearing 3 

 setides distally. Female and male maxilla (figs. 55^, /) 2-segmented, 

 situated slightly lateral and posterior to postoral process. Second 

 segment approximately IK times the length of first, both segments 

 elongate, second thinner than first, distal end of outer surface knob- 

 like, distal half of outer surface finely denticulated. Second segment 

 bearing membranous conical process distally and 2 saber-shaped 

 terminal processes, innermost slightly less than twice the length of 

 outermost, with fine membrane along both margins; outermost ter- 

 minal process with finely frilled membrane along both margins. 



Female maxUliped (fig. 55^) 2-segmented, small in comparison with 

 that of other members of the genus, situated medial and posterior to 

 maxilla base. First segment well developed although of general elon- 

 gate natm'e, tapered proximally to narrow proximal end. Second 

 segment slender, approximately fom'-tenths the length of first, dis- 

 tinct from short, clawlike terminal process, bearing setule-like acces- 

 sory process from distal inner sm-face (not figiu-ed) and small, hahlike 

 process from nodule on distal posterior sui'face. Male maxilliped 

 (fig. 55h) slightly larger than that of female, first segment more 

 strongly developed, with 2 ridge-shaped projections on inner surface, 

 distalmost with small secondary ridge bearing adhesion surface. 

 Second segment and processes as in female. Female and male ster- 

 nal fm'ca (fig. 55i) situated between and posterior to maxilliped bases. 

 Fmxal base elongate, tines angled outward slightly, with broad sur- 

 face, bluntly rounded distally. 



Inner 2 terminal spines of second segment of exopodite of first 

 thoracic leg bifid, both parts of equal length. For armature and 

 natiu-e of thoracic legs, see figiu-e 56 and table 20. 



Discussion. — One of the distinguishing characteristics of C. longi- 

 pedis is the nature of the second segment of the maxilla, with its broad 

 distal end, denticulated margin, and membranous, spine-shaped 

 subtermmal process. Additionally, the broad tines of the sternal 

 furca and the long processes on the exopodite of the fourth thoracic 

 leg are diagnostic characteristics. Although Bassett-Smith's original 

 description (1898b) and figures leave much to be desired, these 

 characteristics, as well as the body shape, are evident. An exam- 

 ination of the type material of C amplijurcus Pearse (USNM 93710) 



