< HA\im.i;i.i\ : IfYBIOPODA <>i TBI AUSTRALIAN REGION. 125 



In the :iiitcim:n' the second and tlnnl articles arc longer than the following 

 one- and the fifth and .sixth an- longer than the fourth. Vertigial sulci] 

 in the o\ her Bpecies. 



Transverse sulcus of tergites distinct over median part of plates though 



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



with edges wholly Bmooth; set off by distinct furrows. Anal tergite more 



narrowed candad than in the other species, candally truncate or only slightly 



concave. 



Length (females), to -~) mm. Males smaller. 



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

 telopodite the broad mesa! edge more strongly bent dorsad; the mesa) 

 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. SOLOMONOSOMA CONFIRM ANS, sp. nOV. 



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

 mons: Pamua (W. M. Mann). 



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 distally 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. now 



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

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

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



