114 



very long. Of the tentacular cirri the ventral one does hardly reach to half the length of the 

 dorsal cirrus. The scales (PI. XXIII, fig. 3) are overlapping each other and cover the dor- 

 sum totally; they are reniform, with the scar of attachment nearly in the centre and a 

 small nerve-ganglion situated next to it. Their surface is smooth except an area along their 

 anterior and internal border, that is covered with small globular tubercles ; the external margin 

 bears some slender papillae. The anterior scales are elliptical, with a smooth surface; their 

 margin, except a small part of the external border, is ciliated. In a typical foot (PI. XXIII, 

 fig. 5) the notopodium is club-shaped, with two short stylodes in its ventral part ; it contains 

 the usual whorled setae. The neuropodium possesses two stylodes on its dorsal border and 

 another pair at the distal end of its ventral side ; moreover near the base of the ventral cirrus 

 there occur three long stylodes. The neuropodial bristles (PI. XXIII, fig. 6) are characterized 

 by the inequality of the limbs of their cheliform appendix, which consists of one short limb, 

 hook-like bent, and an other one nearly thrice as long, straight and tapering distally. There 

 are no multi-articulate compound bristles. In the dorsal part of the neuropodial fascicle simple spi- 

 nose as well as compound bristles occur ; the species therefore belongs to the second group of Potts. 



5. Sthetielais malayana n. sp. PI. XXIII, figs. 7 — 9. 



Stat. 114. 0° 58.5 Lat. N., 122° 55' Long. E. Kwandang Bay entrance (North Celebes). Depth 

 75 M. I specimen. 



At the above-named Station the anterior fragment of a rather large worm was dredged, 

 that cannot be identified with one of the preceding species. It consists of 28 segments and it 

 measures 23 mm. in length and 7 mm. in breadth ; its scales are pale red coloured, whereas 

 the bristles are golden-yellow. The prostomium is broad, heart-shaped ; from the anterior part 

 of its median dorsal line the tentacle arises with a basal joint, that is transversely wrinkled 

 and bears on each side a wing-like ctenidium, that extends along its total length. Its distal 

 part is rather long and tapering and extends to about half the length of the dorsal tentacular 

 cirrus. The lateral antennae could not be observed, because of all the organs of the anterior body- 

 region being densely covered with parasitical animals (? rotatoria). At a short distance behind the 

 tentacle, on the middle of the head a pair of small eyes is visible. The periphery ofthemouth 

 is provided with strong, longitudinal folds. The first parapodium bears two tentacular cirri, much 

 differing in length ; the ventral cirrus measures about a fourth of the dorsal one. The ventral 

 cirrus of the second parapodium is very long; it arises from the base of the neuropodium and 

 extends beyond its distal extremity. In the succeeding segments the ventral cirrus is inserted in the 

 middle of the ventral side of the parapodium and hardly reaches to its distal end. The elytra 

 (PI. XXIII, fig. 7) are overlapping each other in the median dorsal line and cover the whole 

 dorsum ; they are reniform with the elliptical scar of attachment situated in the centre. Their 

 surface is densely covered with small, roundish, orange-coloured tubercles ; their margin is smooth, 

 except at the external side, that is beset with filiform papillae. In a typical foot (PI. XXIII. 

 fig. 8) the notopodium is nearly cylindrical and extends somewhat beyond the distal extremity 

 of the neuropodium; it bears at the end of its ventral border 3 or 4 short, conical stylodes 



70 



