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species. The largest of them has a length of 32 mm., whereas the smallest measures only 16 

 mm. ; the number of segments amounts to 34. The dorsum of the body is covered by a fek, 

 while its ventral .side has a rugose appearance, due to the presence of closely paclced 

 o-lobular papillae; its median region is not translucent as in the preceding species. The 

 stout dorsal bristles are golden-yellow, half as long as the body, with three alternating pointed 

 fano-s beneath the hastate tip; their shaft shows a row of tubercles along one side (PI. XIII, 

 fier. 9). The short dorsal bristles are densely covered with small tubercles. The ventral bristles 

 are not pinnate, but provided with four or five large spines (PI. XIII, fig. 8). 



The head is oval, nearly as long as broad, with two globular eye-peduncles, that are 

 half as long as the basal joint of the tentacle (PI. XIII, fig. 7). The tentacle has a rather 

 long basal part, measuring two thirds of the length of the head and is covered near its base 

 with papillae; its distal part is very long, not quite as long as the palps, and terminates in 

 a clavate tip. The palps are not so long as in L. vialayana, only reaching to the 6"' segment. 



4. Lactnionice dtièiosa Horst. PI. XIII, figs. 10 — 13. 



Horst, Zool. Mededeel. R. Museum Nat. Historie, Leiden, vol. U, 1916, p. 74. 



? Stat. 294. 10° 12'. 2 Lat. S., 124° 27'. 3 Long E. South coast of Timer. Depth jt, M. i specimen. 

 Stat. 302. io°27'.9 Lat. S., 123° 28.7 Long E. North off Rotti. Depth 216 M. i specimen. 



Besides the specimens of Lactinonice rugosa at Station 302 an other worm of the same 

 genus was collected, that could not be identified with any known species. It measures 28 mm. 

 in length, whereas the number of its segments amounts to 35. It is especially characterized by 

 the shape of its large dorsal bristles; these are golden-yellow, with a smooth flat 

 and rather broad shaft, that is suddenly constricted beneath the barbed tij). 

 The tip is provided with three pairs of alternating, elongated, curved fangs (PI. XIII, fig. 11). 

 The bristles extend posteriorly over 10 to 12 succeeding segments. The ventral bristles have 

 the usual shape and are provided with a dense beard of fine pinnae, separated by a short 

 interval from the spine beneath them (PI. XIII, fig. 12). The ventral side of the body is beset 

 with scattered small papillae, that do not cover the whole parapodium (as in L. rugosa) but extend 

 onl\- over the proximal half of it, where the ventral cirrus arises. No dorsal feit occurs. There 

 are 15 pairs of rather large elytra, overlapping each other and totally covering the dorsum. 

 The head (PI. XIII, fig. 10) is rounded, somewhat broader than long, with two globular eye- 

 peduncles, each provided with a black eye-spot. The basal part of the tentacle is rather short, 

 only somewhat longer than the eye-peduncles ; its distal joint is wanting. The palps are rather 

 long, dark-coloured in their distal part and beset with acute, needle-shaped papillae. A smaller 

 specimen, long about 17 mm., collected at Station 294, presumably belongs to the same species. 



5. Laetinonicc breve-pinnata Horst. PI. XIII, fig. 13. ^ 



Horst, Zool. Mededeel. R. Museum Nat. Historie, Leiden, vol. H, 1916, p. 75. 



Stat. 311. Sapeh Bay, east coast of Sumbawa. Depth to 36 M. i specimen. 



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