104 



DISCOVERY REPORTS 



The dorsal ramus (Monro, loc. cit., fig. lo) carries three ctenidia and a long cirriform 

 stylode at its apex. The dorsal bristles are long, slender, capillary and denticulated and 

 have very delicate bidentate tips. The neuropodium has a small papilla probably a 

 bract, on its upper face. Above the neuropodial aciculum there are four kinds of 

 bristles: (i) about half a dozen simple barbed bristles tapering to a point; (2) slender 

 multi-articulate compound bristles (Fig. 12 c) with rows of teeth at the head of the shaft ; 

 (3) one or two compound multi-articulate bristles (Fig. 12 d) with smooth, curiously ex- 

 panded, rounded, fist-shaped apexes to the shaft: in these the manner of articulation 

 between shaft and blade is obscure ; (4) slender multi-articulate compound bristles with 

 normal, smooth tops to the shafts. 



5 MM 



Fig. 12. Sigalion ovigerum. 



a. Head. c. Multi-articulate bristle with toothed shaft. 



b. Pinnate papilla from elytron. d. Special multi-articulate bristle. 



Below the neuropodial aciculum the bristles are all multi-articulate with very long and 

 delicate blades ending like the rest in a beak-like apex. They are thinner than the 

 supra-acicular compound bristles, and the individual articles are longer. The tops of 

 the shafts are smooth. The ventral cirri are subulate and reach to the end of the feet. 



