IIO 



dittering froni the type". Th. gracilis from Ternate undoubtedly is an other species; in this 

 worm the whole dorsum is covered by the scales, that have their external border furnished 

 with undivided spines and bear globular papillae on their upper side. 



Genus Sigalion Audouin et Milne Edwards '). 



Median antenna (tentacle) absent; lateral antennae short and papilliform, fixed to the 

 anterior margin of the prostomium. Four small eyes. No dorsal cirrus on the third segment. 

 Elytra wilh pinnate papillae along the outer margin. Parapodia with ctenidia on the dorsum 

 and stylodes at the tip. Dorsal bristles slender, with denticulate whorls and a bifurcated tip. 

 Ventral bristle-fascicle consisting of compound setae with a cheliform, simple or multi-articulate 

 appendix; in its dorsal part some simple bristles with spinous whorls on their distal extremity. 

 Papillae of the proboscis ^Yi:i- 



I. Sigalion bandaënsis n. sp. PI. XXII, figs. 4 and 5. 



Stat. 240. Banda Anchorage. Depth 9—45 M. 2 incomplete specimens. 



The cephalic lobe is rounded trapezoidal, with its broadest side anteriorly; two papilli- 

 form antennae are inserted on its anterior margin. A pair of longitudinal, inconspicuous pigment- 

 spots, presumably due to the coalescence of two spots, occur in front of the middle of its dorsum. The 

 two anterior parapodia are pointing forward, whereas the third one is pushed away under the 

 second one. The dorsal tentacular cirrus is somewhat shorter than the ventral one, like in Sigalion 

 arenicola') and Sig. pourtalesii'^)\ also the ventral cirrus of the five anterior segments is rather 

 long and extends beyond the parapodial extremity. The palps, bent downward and backward, 

 reach the 9''^ segment. The third segment has no dorsal cirrus. The first branchia lies on the 

 5''^ segment and posteriorly they occur on all the succeeding segments. The anterior elytra are small, 

 oval, with an eccentrical scar of attachment and are inserted upon a long elytrophore ; they 

 bear on the e.xternal border half a dozen of papillae, with three branches on the tip, only the 

 two last ones are undivided. Posteriorly the scales increase in size and grow reniform ; they are 

 provided with a dozen of ramified papillae, that bear no more than five or six branches, whereas 

 next to their base usually an undivided filament arises. The scar of attachment lies in the centre 

 (PI. XXII, fig. 4). 



The parapodia (PI. XXII, fig. 5) are characterized by a rather long digitiform stylode 

 at the distal extremity of the notopodium ; as usually the dorsal fascicle consists of long, simple, 

 capillary bristles with transverse, denticulated ridges along one side and a bifid tip. Mc Intosh 

 unjustly ascribes this structure to imperfect preservation (Brit. Annelids p. 430). Three ctenidia 

 occur between the base of the notopodium and the falciform branchia. The neuropodium bears 

 on its dorsum a tubercular papilla ; its fascicle, besides a couple of spirally-whorled, simple 

 bristles, contains numerous compound, cheliform setae. Ehlers stated that in Sig. potirtalesii 



1) Classification des Annélides: Ann. Sc. nat. t. 27, 1832, p. 438. 



2) Verrill, New England Annelida; Trans.act. Connecticut Acad. Vol. IV, iSSi, PI. VII, fig. 5. 



3) Ehlers, FIorida-Anneliden, p. 57, PI. XV, figs. I — 4; PI. XVI, figs. i^io. 



66 



