178 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



Shiino (1956b) describes an accessory lamella associated with the 

 maxilliile (Shiino's "maxilla") which was not found on the dissected 

 appendage although a cuticular flap is present on the mouth cone 

 anterior to the maxillule. Maxilla (fig. 666) subconical, with numer- 

 ous superficial annulations, distal end concave on inner half and 

 enveloping cylindrical bulla (not figured). 



Maxilhped (fig. 66A) situated posterior and slightly lateral to 

 mouth cone, segmentation indistinct and incomplete although mus- 

 culature suggests 3-segmented condition. Appendage divisible 

 into heavy basal part and clawlike distal part ; basal part with knob- 

 shaped projection from medial inner surface, with minute, doughnut- 

 shaped projection just distal to knob with series of minute denticula- 

 tions on distal inner surface. Clawlike distal part bluntly pointed 

 distally, with setule-like accessory process on distal inner surface, 

 with row of minute denticulations extending from medial inner surface 

 to base of accessory process. 



Description of male. — Cephalothorax or prosome (figs. 67cr,6) 

 ovoid in both lateral and dorsal view, consisting of cephalon and 

 maxilliped-bearing segment. Division between prosome and urosome 

 distinct, complete. Urosome broadest anteriorly, tapered to narrow 

 posterior end; posterior end with large, lappet-like anal laminae, 

 also bearing pair of subconical caudal rami, rami without armature 

 elements. 



Antennule (fig. 67c) 3-segmented, situated on lateral-anterior dorsal 

 surface. First segment broad proximaUy, proximal width more than 

 twice medial width, approximately 4 times distal width; length approx- 

 imately twice combined lengths of second and third segments. First 

 segment with spinule on distal half of anterior dorsal surface. Second 

 segment approximately two-thirds the length of third, with spinule on 

 distal half of anterior dorsal surface. Third segment with indentation 

 on medial anterior surface, indentation bearing single spinule; rounded 

 distal end with 4 setules. Antennae (fig. 67(/) biramous, situated on 

 anterior ventral surface of cephalothorax, below antennule base and 

 lateral to mouth cone. Protopodite 1-segmented, originating from 

 angular projection of ventral surface of cephalothorax. Exopodite 

 lamellate, with spine on medial posterior surface, second spine on 

 distal-outer posterior siu-face (spines not noted by Shiino, 1956b). 

 Endopodite 2-segmented, first segment approximately twice the length 

 of second, second with sharp indentation on distal inner siu-face, 

 bearing clawlike terminal spine and small spinule from indentation. 



Mouth cone projecting anteriorly from anterior ventral surface of 

 cephalothorax, labrum and labium indistinctly separable. Labrum 



