168 PROCEEDINGS OF THE NATIONAL MUSEUM vol. H5 



surface thicker than inner surface, inner surface with 12 toothhke 

 denticuLations (fig. 8i). 



Postantennal process of male simple, spinelike process attached lat- 

 eral to base of second antenna. Base of process a heavily chitinized 

 ring, rest of process slender, falciform, acuminate. Two minute 

 nodules present on basal region, each bearing minute setules. Third 

 nodule present just posterior and medial to base, arising from small 

 plate ; third nodule with two minute setules (fig. 8j) . 



Postantennal process of immature female without ringlike base, 

 spine heavier and shorter than that of male (fig. 8k). 



Postoral process of male and immature female simple, spinelike 

 structure attached lateral to base of mouth cone. Process sharply 

 pointed, with very fine horizontal line dividing process into acuminate 

 distal and broadly tapering proximal parts. Node present just 

 anterior to proximal end of process and bearing three setules (fig. 80. 



Maxilla of male and immature female two-segmented, attached 

 adjacent to postoral process. First segment well developed, oblong, 

 greatest width slightly more than one-third greatest length. Lateral 

 margins almost parallel; inner proximal surface projecting as articular 

 surface, distal margin angling sharply inwards from both lateral 

 margins and projecting in outer medial region as narrow articular 

 surface with slightly concave distal end. Second segment slightly 

 longer than first, slender, with little taper throughout length except 

 at proximal and extreme distal ends. Small, membranous projection 

 present on inner margin in distal third of second segment. Two 

 elongate spines on distal end of segment, inner spine one and one-third 

 times length of outer, with plain, light membrane along both inner 

 and outer margins; inner spine with frilled membrane along outer 

 margin, very fine, plain membrane along inner (fig. 8m). 



Maxilliped of male two-segmented, located medially and slightly 

 posterior to maxilla. First segment strongly developed, inner sm-face 

 of proximal end projecting slightly as broad articular surface, with 

 heavily chitinized knob on outer proximal corner. Distal end slightly 

 less than half greatest width of segment. Inner lateral margin with 

 protrusion of segment in distal region, protrusion receiving terminal 

 process of third segment when segment flexed. Third segment and 

 process short, less than half length of first segment, terminal process 

 short, acuminate, slightly curved. Seta-like accessory process present 

 on inner margin of segment at junction of segment and terminal 

 process. Inner proximal corner with small, heavily chitinized, knob- 

 like articular process. Division between segment and terminal process 

 distinct (fig. 8n). 



Maxilliped of immature female two-segmented, first segment similar 

 to that of male except protrusion of inner surface absent. Second 



