604 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
Kunicipz (Pl. I., fig. 21). 
A Eunicid Metatrochophore has been twice seen. It 
differs from all other larvae here described in that it bears 
the cilia characteristic of a Protrochophore, the true 
trochophore stage having been omitted from its life 
history. 
The larva (Pl. I., fig. 21) is ovate; it is 800” long by 
180 broad; and is invested in a thick ornamented cuticle, 
the ornament being, however, no longer visible when the 
specimens have been mounted in balsam. Cilia 15 long 
project beyond the cuticle all over the body with the 
exception of a narrow tract round the apical tuft of 304 
cilia, and a somewhat larger area round the anus. Close 
to the posterior border of the broad ciliated region there 
is a pair of lateral tufts of 50 cilia. 
At the apical pole the cells take a deep stain; behind 
this there is a faintly-staining tract; and behind this 
again, on the ventral surface, there is another deeply- 
staining area, in which can be distinguished the outlines 
of the three primary segments and the formative region, 
the last being quite narrow in the younger of the two 
specimens, but almost as broad as one of the primary 
segments in the older of the two. Behind this, finally, 
there is in the older larva at least, a narrow band of clear 
tissue surrounding a cluster of deeply-staining cells at the 
extreme posterior end. 
A number of short straight rods were seen during 
life directed towards the surface under the cuticle at the 
anterior end of the larva. <A pair of red eye-spots were 
present near the anterior end. The gut was tinged with 
traces of a pinkish pigment, and contained large clear 
globules. 
In the older larva at least, setae project from three 
pairs of cavities in the cuticle; these setae can be 
