50 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.60 



anal laminae attached to its posterior corners and some distance 

 apart. 



First antennae four- jointed, attached not to the frontal margin but 

 to the ventral surface in front of the bases of the second pair, which 

 are like those of the female. The mouth tube and mouth parts are 

 also like those of the female, the maxillipeds a trifle larger, and the 

 terminal claw not as strongly bent. 



The exopod of the first swimming legs is a flattened lamina, 

 squarely truncated at the tip, and the terminal margin armed with a 

 row of five broad saw teeth. The endopod is cylindrical, enlarged 

 through the center, and terminates in a stout, hairy spine, twice as 

 long as the joint itself. It also carries a row of small sharp spines 

 along its inner margin. Between the endopod and the midline is 

 a tiny process, coming out of the basal joint and unarmed. 



The exopod of the second legs is also laminate, but the lamina is 

 rolled into a loose cylinder. The terminal margin is squarely trun- 

 cated and armed with a row of 12 to 15 soft spinous processes. The 

 endopod is cylindrical and squarely truncated, with a row of small 

 spines along the inner and terminal margins, the two at the outer 

 distal corner being larger and wider than the others. On the ventral 

 surface close to the terminal margin is a large smooth spine about 

 as long as the endopod itself, and farther back beside the inner mar- 

 gin is a secondary row of small sharp spines. Outside the exopod is 

 a jointed spine nearly as long as the exopod itself. 



The third legs extend diagonally backward from the posterior cor- 

 ners of the third thorax segment and are about the same length as the 

 fourth pair. They are uniramose, flattened laminae and end in a 

 single rounded knob armed with small spines. 



The fourth legs extend nearly straight backwards from the 

 posterior corners of the fourth segment. They also are flattened 

 laminae, somewhat widened through the center, and they end in two 

 knobs armed with small spines. These knobs with a fairly deep 

 sinus between them, and the general makeup of the appendages, 

 indicate that each is really made up of two rami fused together. 



Color (preserved material) a clear yellow, faintly tinged with 

 brown. 



Total length, including fourth legs, 2 mm. Cephalothorax 1 mm. 

 long, 1.15 mm. wide. Length of fourth legs, 1.60 mm. 



{chZamydotus^ ^XaExuStoToc, clothed with a cloak.) 



Remarks. — The distinguishing character of this tiny species is its 

 general appearance. It looks in side view like a little old woman 

 env^eloped in a voluminous skirt and wearing a large poke bonnet. 

 The armature of the swimming legs is also peculiar, especially 

 that of the exopod of the second pair. 



