322 University of California Publications hi Zoology. |"Vol. 6 



than four times as Long as the second basal is wide. The outer 

 ramus of the left font terminates about as in the other species 

 (pi. 30, fig. 66), but the third joint ends in a sharp point. 



Length : 3 mm. 



Coloration: The posterior half of the body is orange, there being no 

 pigment anterior to the first pair of feet; there air flecks .if coloring matter 

 in the thoracic segments and basals of the feet. 



Occurrence: Station 1141), vertical from Oof.. June 27, 1906; station 

 1177. vertical from Hid f., June 30, 1906; station 1134, vertical from 285 f., 

 June 20, 1906. 



Females are a good deal more common than males. 



Euchirella truncata n. sp. 



PI. 20. fig. 5; pi. 28, fig. 35; pi. 29, fig. 63; pi. 30, fig. 71 ; pi. 31, fig. 104. 



Adult female. The head is regularly rounded in profile, with- 

 out a crest and with a rostrum (pi. 28, fig. 35) of characteristic 

 shape. The last thoracic segment is very broadly rounded later- 

 ally (pi. 29. fig. 63), and almost square when seen from above. 

 The abdomen is very short, being (with the furea). a little more 

 than one-sixth the length of the eephalothorax. The cephalo- 

 thorax and abdomen arc each 4-segmented (pi. 26, fig. 5). The 

 genital segment is longer than the last three i pi. 29, fig. 63), and 

 the two middle segments are of about equal lengths; the anal 

 segment is about three-fifths tin' length of the third. The (ureal 

 rami are about as broad as long, widely divergent and provided 

 with four bristles richly plumose to their ends and of equal 

 lengths. 



The anterior antennae are 23-jointed and when folded back 

 reach beyond the end of the furca. The posterior antennae are of 

 thi' usual form and the inner ramus is half as long as the outer. 

 The outer ramus of the maxilla has eleven long bristles, the inner 

 ramus four large bristles and one small, and the second basal 

 two large and one small; the outer marginal lobe has eight 



bristles. 



The outer ramus of the first foot is 2-jointed (pi. 31, fig. 104), 

 with three outer marginal bristles; the first basal of the fourth 

 foot has one long heavy spine near the plumose bristle (pi. 30, 

 fig. 71). In the second foot, the outer marginal spines of the 



