chahberun: ictriopoda <>i the Australian region. 205 



segment, weak od the seventh :m<l obscure <>r absent above on the follow inn; 

 ones. Surface in general smooth and shining. Scobina in form of deep Lunate 



impression followed by the usual very line striae; extending caudad <o tin- 

 thirty third segment. 



Anal tergite Of usual form, caudally rounded, much exceeded by the v.dves, 

 surface smooth and whining as is also that of the valves. The latter with 

 surface somewhat flattened hut the cd^r* not set olT by more marked com- 

 pression, 



Number of segments, forty-six. 



length (female), about ( .)f> mm.; width, 10 mm. 



589. DlNEMATOCRICUS PARVIOR, sp. now 



Type.— M. C. Z. 4,728. Solomons: Ngi (W. M. Mann). 



Deep olive. Legs lighter, more brownish. 



Sulcus of head discontinuous at middle. Fovcolac 2 + 2. Lower emargi- 

 nation with three distinct teeth. 



Collum well rounded laterally. Not reaching lower level of second tergite. 

 Margined below and up the front of the corner in the usual way. Surface 

 with weak coriarious lines. A wavy longitudinal stria at level of eye. 



Surface of anterior segments also with weak coriarious lines, but caudad 

 these quickly become obsolete, leaving the surface wholly smooth. Longi- 

 tudinal striae below level of pore deep, more numerous and complete in front 

 of suture, where there are also a few above the level of the pore. On most 

 segments the transverse sulcus is lost in a shallow furrow above which lies a 

 number of weak furrows paralleling it. Scobina present to segment thirty- 

 seven. 



Anal scutum and valves with sparse coriarious lines. Valves exceeding 

 the scutum as usual. 



The distal process of the median plate of the male gonopods narrowed 

 proximally, being ovatelanceolate in form much as in D. obvius. The tclopo- 

 ditcs are also much as in that species, crossing in the middle line and with the 

 lesser branch very short, and well below middle of the longer one; telopodite 

 shorter than in obvius. 



Number of segments, sixty-one. 



Length (male), near 62 mm.; width, 7 mm. 



590. DlNEMATOCRICUS TULAGIANUS, sp. nov. 



Type.— M. C. Z. 4,915. Paratypes.— M. C. Z. 4,916. Solo- 

 mons: Tulagi (W. M. Mann). 



Sulcus of head interrupted in frontal region, distinct elsewhere. Clypcal 

 foveolae 2 + 2. Antennae short; sensory cones four. 



