BY L. HARRISON. 619 



border; with a pair lateral and longer, midway between 

 these two rows; and a second pair, cylindrical and twice as long, 

 in front of and inside the tactilei setae, which are in the antero- 

 lateral corners. The third and fourth shields have six hairs along 

 hind border, all of the same character; and six hairs across the 

 middle, the outer pair slightly longer. The second pair of tactile 

 setae is just in front of, the third pair just behind, the anterior row. 

 The fifth shield has four hairs on the posterior border between and 

 behind the tactile setae ; a pair lateral in front of these ; and a row 

 of six across the middle, the outer pair almost twice as long as the 

 others. The sixth shield has a pair of hairs in the middle; a pair 

 lateral behind these; and a pair close to the posterior border, be- 

 tween the tactile setae, which are at the posterolateral angles. The 

 tactile setae are delicately plumose almost to their bases, the last 

 pair being longest. The rounded anal segment ends posteriorly 

 in a button-like process, in front of which is a row of four clavate 

 hairs, with a longer curved pair laterally. Below, it bears a pair 

 of cylindrical plumose hairs, slightly swollen at the distal extremi- 

 ties, about the middle of its length; the styli long, with the distal 

 half thinner than the proximal; and a pair of short, curved, club- 

 shaped hairs, one outside each stylus. The anal plate is deeply 

 cleft medianly, with four processes in one plane, the outer pair 

 short, cylindrical, and reaching to the suture of the inner pair ; the 

 latter with sutures running diagonally inwards and backwards, the 

 part behind the suture being precisely like the ordinary clavate 

 hairs, with the inner face flat, the outer curving outwards distally. 

 On the ventral surface, the twelve segments are completely marked 

 off by transverse sutures less distinct laterally, cutting off a series 

 of dicebox-shaped sternal areas. The copulatory appendages of the 

 male are conical, extending without setae to the hind border of the 

 somite. The genital opening of the female is unpaired, and situated 

 to the right of the midline. The rudimentary limbs of the fii'st 

 somite each bear two biramous hairs, the inner branches being re- 

 duced, and having a cylindrical process articulated distally. The 

 penultimate legs are longest. The first leg has a cylindrical curved 

 hair on the anterior face of the tibia, and a similar very short one 



