CEIAMBERLIN: MYRIOPODA of the AUSTRALIAN REGION. 233 



Head smooth. Sulcus widely interrupted in the frontal region. Antennae 

 long, reaching to tlie caudal edge of the second tergite. Eyes large, only 

 about their diameter apart. The cardo of the gnathochilarium much more 

 strongly produced than in Trigoniulus lumbridnus. 



Collum with lower angle more acute than in T. lumbridnus, its anterior edge 

 straighter. 



Transverse sulcus curved at level of the pore. The principal markings of 

 the segments dorsally are short, curved impressions in a band just in front of 

 the position of the suture, these much fewer than in T. lumbricinus and absent 

 excepting in the narrow band mentioned, no coarse punctae. Segments 

 strongly longitudinally striate beneath and part way up the side. 



Anal scutum smooth and shining, much exceeded by the valves. Valves 

 with borders compressed and elevated but not set off by a marginal furrow; 

 border crossed by distant fine sulci and also some fine vertical sulci across 

 upper part of each valve. 



Median plate of gonopods with branches widely diverging, broad, curving 

 about bases of gonopods as in Acanthiulus and Spirostrophus ; mesal process 

 or free portion of outer branch farther dorsad or toward end of arm than usual 

 in Spirostrophus, broad and thin, short. Femur of anterior gonopods promi- 

 nently ridged along mesal side and extended on this side distad as a conspicu- 

 ous rounded prominence along the side of the tibial lobe toward which it 

 curves. The tibial lobe short, rounded, without angles or processes. In the 

 posterior gonopods there is at the tip a triangular plate and below this a thin 

 plate-hke extension showing a median spine-Uke rib. From a rounded lobe 

 proximad of this extends a slender acute needle or style which seems to con- 

 tain the terminal part of the seminiferous duct but this could not be ascertained 

 with entire certainty. 



Number of segments, fifty-four. 



Width, 4.5 mm. 



The following species were inadvertently omitted from the manu- 

 script as prepared for publication. 



Platyrrhacus SARAsmoRUM Carl. 

 Rev. Suisse zool, 1912, 20, p. 144, pi. 5, fig. 17.' 

 Locality. — Celebes: Uangkahulu-Tal.^ 



Platyrrhacus alatus Carl. 

 Rev. Suisse zool., 1912, 20, p. 146, pi. 5, fig. IG and text fig. 11, 12.> 

 Locality. — Celebes.^ 



