( iiamhkui.in : IITBIOPODA OF THE AUSTRALIAN REGION. 101 



271. SlPHONOPHORA NAN80BIANA, sp. now 



Type. M. C. Z. 1,578. Pabai yi«ks — M. C. X. l,r>xi. Fijis: 



Nansori, Laseina ( \\ . M. Mann). 



I lark fulvous, uniform. 



Rostrum equal in length to the head, very slightly curved. Antennae 

 strongly clavate; surpassing the rostrum, the latter not fully attaining the 

 middle of the penult article, and thus shorter relatively than in S. flavicepa, 

 the Javan species. 



First tergite with lower margin straight, on a level with the others; equal 

 IB length to the two succeeding tergites taken together. Tergites densely 

 clothed with fine hairs which are short but obviously longer than in 8. zelandica. 



Pleurites with caudal margin straight as is also the ectal, the latter finely 

 serrate; mesal corners rounded, the mesal side weakly emarginate at middle. 



Number of segments in type, fifty-eight; in paratypes, forty-three to 

 fifty-five. 



Length, 12 mm. 



272. Siphonophora dux, sp. nov. 



Type.— M. C. Z. 4,970 (female). Solomons: Bulimatarava (W. M. 



Mann). 



Body in general of light ferruginous cast, rostrum paler and antennae bright 

 yellow. 



Rostrum much exceeding the head proper in length and also a little exceed- 

 ing the antennae. Antennae widening a little to near middle, then nearly of 

 uniform width; sixth article cylindrical, slightly narrowing at distal end, 

 equalling the preceding two and a half articles or more. 



Collum longer than the two succeeding somites together; anterior margin 

 nearly straight; anterolateral corners obliquely cut off, the oblique edge a 

 little convex, more angled at each end; lower margin straight. 



Body very slender. Dorsum very densely clothed with short hairs which 

 are longer on head and on last segments. Posterior margin of pleurites 

 evenly convex; mesal margin angularly emarginate at middle, the lobe on 

 each side evenly convex. 



Number of segments (female), seventy-eight. 



Length, 19.5 mm. 



273. Siphonophora obscurior, sp. nov. 



Type.— M. C. Z. 4,971. Paratypes.— M. C. Z. 4,972, 4,974, 

 4,978. Solomons: Fulakora, Pamua, Wainoni Bay, Auki (Y\ . M. 

 Mann). 



