CHAMBERLIX: MYRIOPODA OF THE AUSTRALIAN REGION. 125 



In the antennae the second and third articles are longer than the following 

 ones and the fifth and sixth are longer than the fourth. Vertigial sulcus as 

 in the other species. 



Transverse sulcus of tergites distinct over median part of plates though 

 not sharply impressed. Longitudinal median sulcus weak. Keels thick, 

 with edges wholl.y smooth; set off by distinct furrows. Anal tergite more 

 narrowed caudad than in the other species, caudally truncate or only slightly 

 concave. 



Length (females), to 25 mm. Males smaller. 



Easily distinguished by the structure of the male gonopods. In the 

 telopodite the broad mesal edge more strongly bent dorsad; the mesal 

 distal process is broader proximally with the slender tip less curved. 

 The outer process is of uniform width, ribbon-shaped to the end where 

 it expands clavately a little and is truncate; it curves cephaloectad. 



350. SoLOMOXOsoMA coxFiRMAXs, sp. nov. 



Type.— M. C. Z. 5,005. Paratype.— M. C. Z. 5,007. Solo- 

 mons: Pamua (W. M. ^Vlann). 



The coloration of this species is like that of S. nigrum, the dorsum 

 including entire keels black excepting the obscure reddish middorsal 

 spots. Legs and antennae black. In other general characters also 

 agreeing with that species though obviously larger and more robust. 



Distinguished from S. nigrum and didymus in structure of the gono- 

 pods. These have the telopodites shorter and proportionately broader- 

 It may at once be distinguished from the first of these in the much 

 larger outer triangular expansion on the edge of the telopodite which is 

 also farther distad; and from the second in the form of the outer distal 

 process which is of nearly uniform width throughout its length, lack- 

 ing the conspicuous large cuneate expansion of the end. In didymus 

 the inner distal process surpasses the outer one while in nigrum the 

 outer is but little the larger; in the present species the outer process 

 is obviously the larger, the inner being cUstally very slender and some- 

 what angularly bent in its distal part. Just mesad of base of inner 

 distal process the edge presents an acute tooth. 



Length, to near 30 mm. 



'»' 



MiMOSOMA, gen. nov. 



Composed of head and twenty segments. In general of the Ortho- 

 morpha form. The second keel large and Ijelow^ level of the others; 

 other keels decreasing in size caudad and may be essentiallv obliter- 



