686 PROCEEDINGS OF THE NATIONAL MUSEUM vol. xxvni. 



other. Each branch is slender, conical, and rather l)lunt, without 

 flanges or wings of any sort. 



Between the bases of these maxilla^ and those of the second antenna? 

 there is on either side a pair of conical papilla?. The larger of these 

 is in a line between the two appendages mentioned, and is furnished 

 with a stout spine which is inclined strongly l)ackward. The other 

 smaller papilla, which is without a spine, joins the larger one on its 

 outer border. These evidently represent the rudiments of the endopod 

 of the second maxilla?. The first maxillipeds are slender, the terminal 

 joint nearly twice the length of the basal and ending in three long 

 seta% the inner two of which are pectinate. The second maxillipeds 

 are stouter, with the terminal claw nearly as long as the basal joint and 

 acuminate; the accessory spine is long and slender. Furca short and 

 very wide, the branches longer than the base, widely separated, and 

 nearly parallel, with the intervening sinus ])ut little rounded. The 

 branches are short and blunt wnth a slight flange on the inner side, 

 making them widest at the center. 



The first swinnning legs are short and stout, the basal joints con- 

 nected across the median line b}' a narrow band of chitin, and each of 

 them armed posteriorly w4th a short, blunt spine. The second joints 

 are fringed with hairs posteriorly and carry a single small spine at the 

 distal end anteriorly. The three terminal claws decrease in size pos- 

 teriorly, the third one being only half as long as the tirst. The seta 

 at the distal corner is very small, being no longer than the shortest 

 claw. The second pair of legs are also stout, the basal joints being 

 nearly circular in outline and densely fringed with hairs around their 

 entire margin. The liasal joint of the exopod is noticeably long, and 

 the spines are slender and sharp. The rami of the third legs are large 

 and close together, the spine at the base of the exopod being twisted 

 until it is nearly parallel with the margin of the basal apron. The 

 fourth legs are large and reach back considerably beyond the posterior 

 margin of the genital segment; they are four-jointed, the l)asal and 

 third joints carrying spines at their distal ends, and the terminal joint 

 ending in three short spines of al»out equal length. The flfth legs are 

 well detined and their seta show beyond the edge of the genital 

 segment. 



Total length T nun. Length of carapace 4 mm.; width of same 3.25 

 mm.; length of genital segment '2.1 nmi.; length of abdomen 0.5 mm.; 

 length of egi^ strings (kS mm. 



Color a uniform light yellowish white. 



('parvivetilris, parrKs, small, and renter, the abdomen.) 



Male. — Carapace elliptical, one-eighth longer than wide, the posterior 

 sinuses very broadly triangulai', leaving a well-rounded median lobe 

 and lateral lot)es, which flare outward. 



Free thoracic segment considerabl}' narrower than the genital seg- 



