CHAMBERLIN : MYRIOPODA OF THE AUSTRALIAN REGION. 193 



Sulcus of head fine and complete, though fainter near level of antennae, 

 where crossed by several striae angled on the sulcus. Surface in general 

 smooth and shining. 



Collum laterally well rounded; failing much of reaching the lower edge of 

 the second tergite which is not at all excavated below. Surface appearing 

 smooth and shining, very finely coriariously striate, the striae coarser below 

 on each side. 



Second, third, and fourth tergites with dorsum crossed by a transverse 

 stria; on the fifth tergite a weak anterior transverse stria and a deeper sulcus 

 near middle but curving farther forward on each side with behind it on each 

 side a shorter vertical stria paralleling it. On the sixth (first porigerous) 

 tergite two complete deep transverse sulci, the ordinary segmental one which 

 is strongly curved behind the pore and one in front of this beginning a httle 

 above the level of the pore. On the sixth tergite the anterior sulcus is weaker 

 and on the seventh absent. Caudally the other sulcus becomes weaker and 

 weaker above to very obscure and finally quite absent. Covered part of 

 tergites coriariously striate, the striae chiefly subvertical; elsewhere the 

 surface is very densely marked with fine longitudinal sulci which give a silky 

 lustre as in D. holosericeus. Scobina from the eighth to the thirty fifth seg- 

 ment; each a deep lunate impression with fine striae behind it. 



Anal scutum short, the posterior angle very obtuse, not free, exceeded by 

 the valves, surface shining, less dull and silky appearing than the other tergites 

 but similarly crossed by numerous longitudinal striae which, however, are 

 coarser and less regular. Valves but slightly compressed, smooth, and shining, 

 without striae excepting a series of weak ones across upper border. 



Number of segments forty-seven to fifty-one. 



Length (female), 82 mm.; width, 8.5 mm. The males proportionately 

 somewhat stouter, a specimen 78 mm. long having a width of 9 mm. 



Evidently close to D. holosericeus Brolemann, but readily distin- 

 guished by the form of the gonopods. In these the distal lobe of the 

 median plate is proportionately somewhat longer, more angular at 

 apex and narrower across base; the distal piece of the posterior gono- 

 pods has the inner branch even smaller than in D. holosericeus but the^ 

 most pronounced difference is in the outer branch which bends strongly 

 first toward the body, then ectad and then at tip curves back in a hook. 



573. DiNEMATOCRICUS PERMUNDUS, sp. nOV. 



Type.— M. C. Z. 4,729. Paratypes.— M. C. Z. 4,730. New 

 Guinea: Manokwari (Thomas Barbour). 



Color a deep shining oUve to black. Posterior margins of segments rufes- 

 cent, the collum also in front as well. Head hke the body, or in clypeal and 



