602 F, H. GRAVELY. 
in proportion to the size of the head they are very much 
larger than in the mature form. Lateral cephalic tentacles 
are present as short projections from the head, but I have 
been unable to distinguish the median tentacle. It is im- 
possible to determine with certainty from the mounted speci- 
men whether any ciliated bands are present or not. 
The peristomial segment is extremely short, and apparently 
bears no cirri at this stage. The next seven segments bear 
uniramous parapodia. These are probably all provided with 
TEXT-FIG. 2. 
i) 
Compound seta of pelagic Odontosyllis; from a mature specimen. 
dorsal cirri, though those of the first two pairs are very diffi- 
cult to distinguish. Hach of these uniramous parapodia is 
supported, as in the adult, by a single stout aciculum which 
is straight, or nearly so; and each bears a tuft of sete, one 
capillary, and the rest compound with the comparatively long 
distal segment characteristic of O. gibba. 
