356 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.39. 



jointed, the proximal joint with a single spine, the terminal joint 

 with eight plumose setse in the third leg and four in the fourth leg; 

 the endopod is composed of a single tiny joint, armed with one spine. 

 If the entire length of the trunk be divided into thirds, the pits and 

 legs are on the dividing lines between the thirds. 



The fifth legs are at the junction of the trunk with the posterior 

 portion of the body; each is narrow, one-jointed, and tipped with 

 three plumose setse. The legs themselves are found only in the male, 

 but the appropriate muscles for them are present in the female 

 (fig. 103). 



The genital segment is relatively very small, only one-fourth the 

 width of the trunk, and forming with the abdomen a triangle whose 

 base, joined to the body, is a little longer than the two sides. The 

 openings of the oviducts are on either side a little in front of the abdo- 

 men (fig. 111). The egg-cases are somewhat cigar shaped and a little 

 longer than the entire body. The eggs are exceedingly minute and 

 arranged in 25 to 40 longitudinal rows, about 50 eggs in each row. 



The abdomen is one-jointed, considerably wider than long, and 

 carries on its ventral surface a pair of rudimentary anal laminae, each 

 armed with three setse, of which the central one is the longest, the 

 outer one two-thirds as long and the inner one very short, some- 

 times lacking (fig. 111). The ovary occupies the entire coelomic por- 

 tion of the fused thoracic segments, the eggs being scattered through 

 the body cavity with no apparent regularity. 



Total length, 1.67 mm. Cephalothorax, 0.25 mm. long, 0.53 mm. 

 wide. Trunk 1.2 mm. long, 0.9 mm. wide. Length of egg-strings, 

 1.75 mm. 



Color, a light cartilage gray in living specimens; in preserved mate- 

 rial anything from opaque white to a dark gray-brown, according to 

 the method of preservation. 



IfaZe.— Body similar to that of the female, but with the cephalo- 

 thorax fully as wide as the trunk, and the genital segment and 

 abdomen proportionally much larger. Lateral wings of the cephalo- 

 thorax not lobed; antennae and mouth-parts similar to those of the 

 female. Maxillipeds considerably enlarged and placed behind the 

 other mouth-parts as in the male of Bomolochus. Trunk elliptical 

 in shape, with evenly rounded sides and corners; rudimentary third 

 and fourth legs larger than in the female, posterior pair as close 

 together as the anterior. Genital segment enlarged to half the width 

 of the trunk and armed with a pair of stout hooks on the ventral sur- 

 face at the posterior corners. 



Spermatophore receptacles large and plainly visible in both dorsal 

 and ventral views. Abdomen one-jointed, anal laminae larger than 

 in the female and the setse much longer. 



