94 



I 



Genus Lagisca Rlalmgren '). 



This ijcniis difters from Harmothoé especially by a greater number of segments, 40 or 

 more There are 15 pairs of scales; the posterior segments of the body are uncovered. 



1 . Lagisca corimta Potts. 



Potts, loc. cit., p. 339, PI. XIX, fig. 14; l'l. XXI, fig. 48. 



rStat. 96. Sulu Archipelago. Depth 15 M. 2 young specimens. 



Stat. 100. <iP \i Lat. N., I20°37'.5 Long E. Sulu Sea. Depth 450 M. i incomplete specimen. 



Stat. 139. 0° \\ Lat. S., I27°25' Long. E. North off Batjan. Depth 397 M. 2 specimens.. 



Stat. 173. 3° 27.0 Lat. S., 1 3 i°o.'5 Long. E. Off East coast of Ceram. Depth 567 M. 2 specimens. 



Stat. 262. 5°53'.8 Lat. S., I32°48'.8 Long. E. West off Great Kei Island. Depth 560 M. 2 



specimens. 



Stat. 266. 5°56'.5 Lat. S., 132° 47'. 7 Long. E. Oft" Kei Islands. Depth 595 M. 4 specimens. 



At the above-named Stations specimens of a Lagisca were collected. that must be iden- 

 tified with Lag. cornuta, described by Potts from Salomon Island -). The species is distinguished 

 from the closely alHed Lag. flaccida Potts and Lag. crosctcnsis Mc Intosh'') by its short lateral 

 antennae, that have their basal portion dilated. In the specimens of the Siboga, Hke in that 

 of PüTTS, the tentacle is wanting. Both pairs of eyes are large and in our specimens, the pos- 

 terior pair of them is much larger than it is indicated in figure 14 of Potts. The small 

 specimen of Stat. 273 only possesses some elytra and these much agree with the scales 

 of Lag. crosetensis\ their surface is covered with spines, commencing anteriorly as minute 

 tubercles, and having their posterior and outer border fringed with cilia. In the parapodia the 

 dorsal cirrus is long and slender. not dilated below the tip ; the ventral cirrus hardly extends 

 beyond the base of the neuropodial fascicle. The dorsal as well as the ventral branch of the 

 foot has a digitiform process, in which the acicula is enclosed ; the first-named branch is some- 

 what shorter than the last one. The ventral margin of the neuropodium is densely beset with 

 glandular tubes. The dorsal fascicle consists of a fan-like tuft of stout, slightly bent setae, with 

 serrated fringes up to the tip and some of the bristles have a faintly bifurcate apex. The 

 ventral setae are more slender and straighter, with several rows of spines in their dilated part 

 and an acute incurved tip, with a long slender spine under it. 



2. Lagisca flaccida Potts. 



Potts, loc. cit. p. 339, PI. XVIII, fig. ii, PI. XXI, figs. 49 and 50. 

 Stat. 305. Solor Strait. Depth 113 M. i specimen. 



A worm from the above-named Station must, in my opinion, be identified with Lag. 

 flaccida Potts from Zanzibar, which is especially characterised by the feature of its elytra. lts 



1) Nordiska Hars-.innulater, p. (J5. 



2) In Lag. imlica I'otts, according to Potts' description and figure, the lateral tentacles are prolonga tions of the frontal 

 Ijorder of the head, instead of being inserted beneath it; thevefore I presume, that it does not at all belong to the genas Lagisca. 



3) Challenger -Annclida, p. 88. 



5° 



