95 



length is iS mm., the number of segments 40. However some of Potts' statements coulcl not 

 be confirmed, f. i. he mentions "small distinct eyes", whereas in our specimen the eyes are 

 rather large. The elytra are transparent, vvith an opaque ring- around the scar of attachment 

 and the outer half (inner according to Potts) of the surface is covered with small cylindrical 

 tubercles, whereas upon the inner half there is a group of mammiform eminences, lying parallel 

 to the margin. 



3. Lagisca Pottsi Horst. 



[Polynoë longicirrus Potts). 



Potts, Polychaeta of the Indian Ocean, p. 336, PI. XVIII, fig. 9, PI. XX, fig. 29, PI. XXI, 

 figs. 37 and 38. 



Stat. 51. RIolo Strait. Dcpth froin 69 to 91 M. 2 specimens. 



Stat. 164. i°42'.5 Lat. S., i3o'^47'.5 Long. E. South ofif Sahiwatti Island. Depth 32 M. 1 specimen. 



At the first-named Station a badly preserved specimen of this species and the anterior 

 fragment of another one was dredged. It is characterised by its long dorsal cirri as well as 

 fcy the peculiar shape of its inferior neuropodial bristles, that have a hook-shaped extremity 

 with faintly developed laciniate fringes. 



Potts appears to have overlooked that the name of Polynoc longicirra was already 

 given by .Schm.arda in 1861 to an other worm from Ceylon ^), that according to Marenzeller 

 must be ranged among Scalisetosus \ therefore I propose to call the species, described ' by him 

 from the Maldives, and that presumably belongs to the genus Lagisca, Lagisca Pottsi. 



4. Lagisca elvtropliora Horst. PI. XX, figs. g — 11. 



Horst, Zool. Mededeel. R. Museum Nat. Historie, Leiden, vol. I, 191 5, p. 15. 



Stat. 273. Anchorage oft" Pulu Jedan (Aru Islands). Depth 13 M. i specimen. 



At this Station a Z^'^Ar^'-species was caught, that cannot be identified with one ot the 

 known species of this genus; it ijj a female with eggs, that has a length of about 13 mm. and 

 consists of 45 segments. It is characterised by its large elytra, not only overlapping each other in the 

 middle of the dorsum, but also covering entirely the parapodia. The head shows a conspicuous 

 median dorsal groove, from which the basal part of the tentacle arises ; its distal joint is slen- 

 der, pointed, nearly as long as the head. The lateral antennae are short, as long as half the 

 breadth of the head. The palpi are stout, with a filiform distal part longer than the tentacle. 

 Of the tentacular cirri the dorsal one is the longer, not quite as long as the palpi. No eyes 

 are visible. There are 15 pairs of elytra, considerably overlapping each other; they (PI. XX, 

 fig. 9) are large, reniform, with the scar of attachment nearly in the centre and numerous rami- 

 fied nervous stems radiating from it. Their surface is bare, e.Kcept the region behind the con- 

 cave border, that is covered with small tubercles ; their margin is smooth. Dorsal tubercles 



i) ScHMARDA, Neue Wirbellose Thiere, Bd. i, p. 152, pi. XXXVI, lig. 309. 

 2) Makenzeller, Südjapanische .\nneliden, 111, 1902, p. 12. 



51 



