POLYCILEZT LARV-E. 583 
86-91; and Pl. VIII., fig. 40). A slightly different form 
of larva has, however, been described by Korschelt (1895 : 
pp. 279-285, Pl. XIII., figs. 16-29) under the name of 
‘ Harpochacta cingulata”’ and referred to the Syllidae. 
This larva is polytrochal, its appendages arise much later 
than appears to be usual in the Syllidae, and it is charac- 
terised in the later stages by the presence of a pair oi 
stout sickle-shaped bristles on every segment after the 
fourth, and by the deeply pigmented anal segment. 
(?) Syllid (Pl. I., fig. 5).—Only the first meta- 
trochophore stage of this larva has been seen, and this 
gives no clue to its systematic position; it appears, how- 
ever, to be of the same species as a larva described by 
Hacker (1896: pp. 82-84; Pl. III., figs. 6-7) and con- 
sidered by him to be probably a Syllid. Only two 
specimens have been seen, and these were not examined 
alive. The larva is nearly four times as long as it 1s 
broad, and bears four equally developed ciliated bands, 
one near each end and the other two a quarter and half 
way respectively from the anterior to the posterior band 
Peele ae.o) The maximum breadth of the larva 
occurs between the second and third bands, there being 
no umbrella. Hacker figures a pair of eyespots in front 
of the anterior ciliated band in his larva. No setae are 
present. 
Hacker (1896, pp. 82-84: Pl. II., figs. 6-7) describes 
and figures this and a later metatrochophore stage of this 
or a very similar larva. ‘The latter has about fifteen 
segments, each containing a stout sickle-shaped bristle, 
but bearing no projecting parapodia. The eyes (still a 
single pair) are larger than before, and there is an 
extremely large and conspicuous patch of pigment on the 
anal seement. He considers that this larva comes very 
near to “ Harpochaeta cingulata,” described by Korschelt 
