chamberlin: myriopoda of the Australian region. 195 



Related to D. micropygus (Silvestri), hut a larger species cllflFcring 

 in having the two branches of the telopodite very unequal in length, 

 the inner l)ranch extending a little beyond the middle of the outer 

 one, and also in having the process of the median plate more lanceo- 

 late, and the margin of the basal part more evenly curved. Also the 

 scobina extend caudad only to the twenty third somite instead of to 

 the thirty second. 



575. DiNEMATOCRicus BiONUS, sp. nov. 



Type.— M. C. Z. 4,727. Solomons: Bio (W. M. Mann). 



Color olive-brown. Legs deeper, somewhat purplish brown of olive cast. 



Sulcus of head interrupted near middle, elsewhere sharply impressed. 

 Foveolae 2 + 2. Incision in lower margin with a wide dentate plate showing 

 four rounded teeth or crenations of which the two middle ones are less deeply 

 separated. Surface above with coriarious markings, the transverse striae 

 below much as usual. 



Collura narrowly rounded below, not reaching lower level of second tergite. 

 Margined below and up the anterior side of the corner. Surface closely but 

 finely coriarious. 



Surface of other segments finely loosely coriarious with numerous very fine 

 puncta intermingled, the striae weak especially in the posterior region and 

 running chiefly in the longitudinal direction. Suture traceable across dorsum 

 on all segments but more distinct in anterior region. Transverse striae well 

 marked below level of pore, then more obUque; on the fifth and sixth segments 

 a transverse sulcus in front of the suture which is much deeper than the latter, 

 a similar sulcus also on the second, third, and fourth segments but the ordinary 

 suture obsolete on these segments. Scobina transversely elongate, separated 

 from each other by only their own width; each a deep lunate concave impres- 

 sion followed by a finely striate area of a low triangular form; present on 

 segments from the eighth to the twenty eighth inclusive. 



Anal scutum and valves with surface hke that of preceding segments. 

 Valves protruding but border not set off by concave impres.sion. 



Number of segments, sixty. 



Length (female), near 145 mm.; width, 11.5 mm. 



576. DiNEMATOCRicus OBVius, sp. nov. 



T^'PE.— M. C. Z. 4,725. Paratypes.— M. C. Z. 4,720. Solo- 

 mons: Maru Bay, San Cristobal (W. M. Mann). 



General color oUve, the anal scutum and valves sometimes hghter, more 

 brownish. Legs also oUve. 



