704 PROCEEDINGS OF THE NATIONAL MUSEUM. rou 47. 



gi'oove; trunk ovate, flattened dorso-ventrally, and in older speci- 

 mens mucli Avrinkled; at least two segmentations plainly indicated 

 by breaks in the ventral musculature, by ventral grooves, and by 

 lateral indentations; two paire of posterior processes, one dorsal, 

 the other ventral, the latter usually half the diameter and length of 

 the former, and closer together; both pairs curved like parentheses 

 marlffi, and the bases of the dorsal pair curved around inside the 

 point of attachment as two small knobs, side by side on the median 

 line; no genital process; egg strings between the two pairs of proc- 

 esses and a little longer than the doreal pair; eggs minute, arranged 

 in 10 or 12 longitudinal rows, fully 75 eggs in the longest rows. 



Firet antennae stout, three-jointed, unarmed; second antennae 

 turned down across the frontal margin, the exopod minute, degen- 

 erate, and nearly fused with the endopod. First maxiUae large and 

 stout, tripartite, each ramus swollen at the base and tipped with a 

 single spine; palp also swoUen, turned at right angles to the rest of 

 the appendage and tipped with a single spine. 



Second maxiUae small and short, and free to the veiy tips, each 

 maxilla ending in a semilunar attachment disk; the edges of the disks 

 are grown together, but apparently they do not form a single bulla. 

 At the base of each maxilla on the dorsal surface is an oblong ridge 

 or projection, which runs lengthwise of the appendage and contains 

 the maxiUary gland. 



MaxiUipeds widely separated, so that aU the other mouth parts can 

 be seen between them in ventral view; basal joint triangular and 

 much longer than wide; terminal claw slender, and tipped with a 

 single spine which shuts into a depression on the inner margin of the 

 basal joint; no accessory spine. 



Color (preserved material), a rich golden yellow. 



Cephalothorax, 6 mm. long, 1 mm. wide. Trunk, 6 mm. long, 3 

 mm. wide. Doreal posterior processes, 8 mm. long. Egg strings, 

 9 mm. long. 



Specific characters of male. — Head at an angle of 45° with the bodj^ 

 axis and covered with a weU-defined carapace; posterior cephalo- 

 thorax contracted into a narrow, wasplike waist, where it joins the 

 trunk; the latter ovate, with a pair of slender conical anal laminae 

 at the pointed posterior end, on the dorsal surface. Ventral to the 

 anal laminae is the rounded genital process, which is a little longer 

 and much tliicker than the laminae. 



Fu*st antennae stout and three-jointed; second antennae biramose, 

 the endopod tipped with a single spine, the exopod with a minute 

 chela. Mouth tube large and in line with the axis of the head; first 

 maxiUae short and wide, like a hand with three fingers and a thumb, 

 each tipped with a single spine. Second maxillae large, \^^dely sepa- 

 rated, each tipped with a long curved claw. MaxilUpeds close 



