LAGISCA ELISABETHS. 303 



fig. 3, an average form) have the spinous rows much more distinct than in L. floccosa or 

 its variety, and the smooth portion at the tip is small and acutely pointed. The ventral 

 bristles do not much differ. The anterior pair of eyes are proportionately much larger 

 than in L. floccosa. 



The Polynoe foliosa of Savigny (1820) seems to come near this species. 



De Quatrefages (1865) describes it as having a small head, almost quadrate, a long 

 thick median antenna, the lateral small and slender. Segments 40 — 42. Scales large, 

 much imbricated and decussate, rounded, smooth, not ciliated, caducous. He procured 

 it, 42 mm. long, on the oyster-banks at St. Yaast. When living it is of a brownish-white 

 colour (reddish brown ?), and thus is readily distinguished from its congeners. 



Grube found a species at St. Vaast, where De Quatrefages had met with his, with 

 only fifteen pairs of elytra, which, however, had cilia on their border ( u Am Aussenrande 

 gefranzte Elytren besitzt "). If such be so, then the species differs from Lagisca floccosa, 

 in which no cilia are present on the scales. 



Hornell says his specimens possess fifteen pairs of elytra, with only subglobular 

 processes on the margin (whereas P. floccosa has clavate). He thinks Malmgren's artist 

 exaggerated the spikes on the dorsal bristles, making them too coarse. His specimens 

 agreed in colour with Malmgren's L. propinqua, but differed from mine. He figures one 

 of the globular papillee near the margin of the scale. 



L. Poule found what he thinks a variety at depths ranging from 650 metres to 

 1700 metres in the Atlantic, with small eyes and pale scales. Its relationship to other 

 closely allied forms has yet to be determined. 



2. Lagisca Elisabeth^, 1 Mcintosh, n. s. 



Specific Characters. — This species has 30—35 segments, but a considerable portion 

 of the tail is absent. Head curiously mottled with black. Eyes black, nearly equal; a 

 pair at the anterior border, and the other on the lateral prominence of the head. 

 Tentacles and tentacular cirri ciliated, and the ventral cirri have also short clavate cilia. 

 Palpi with a dense series of minute papillaB with enlarged tips. Scales, probably fifteen 

 pairs, scabrous, greyish mottled with black, densely spinous, with one or two large conical 

 processes posteriorly, and the outer and posterior edge fringed with club-shaped cilia. 

 Dorsal bristles with well-marked spinous rows, and a minute bare portion at the tip. 

 Ventral bristles mostly bifid. Akin to L. floccosa. 



Synonyms. 



1875. Lagisca propinqua, Mcintosh. Invert, and Fish., St. A., p. 115. 



1876. „ „ Ibid. Trans. Zool. Soc, ix, p. 375, pi. lxvii, figs. 12—14. 



Habitat. — Procured from the debris brought by fishing-boats from the off-shore 

 waters, St. Andrews, 1870 (E. M.). 



Head (Plate XXVII, fig. 3). — The head is curiously marked, for a pale band of 

 considerable breadth occurs posteriorly — boldly defined by the blackish collar. A pale 



1 Named after the best benefactress in Marine Zoology my museum ever had. 



40 



