REPORT ON THE ANNELIDA. 
215 
forward. The upper lobe of the foot rather longer than in the previous form, and the 
dorsal cirrus somewhat shorter ; otherwise both bristles and lobes nearly correspond. 
A fragmentary example of about forty-six segments of the anterior region, and 
measuring 20 mm. in length and 4*5 mm. in breadth anteriorly. 
The head is nearly as long as broad, and is furnished with four large eyes, the 
anterior pair being slightly lateral in position, with the lenses directed outward. They 
are very little larger than the posterior pair, which also have their lenses somewhat 
external, though, when viewed from the dorsum, a ring of black pigment is seen all round. 
The tentacles are fully the length of the head, and finely tapered at the tip. The 
palpi are rather shorter than in Nereis dumerilii, and their terminal boss smaller. The 
long cirri are absent, but judging from the other forms present they would seem to have 
been very long, probably as long as in Nereis tongatabuensis. 
The buccal segment is slightly pointed forward in the middle line dorsally, and is 
about the breadth of the succeeding (both being narrow). The proboscis is withdrawn. 
On the dorsal surface of each elevation of the basal (buccal) region of the latter is an 
irregular group (VI.) of small points visible under a lens, and there are single rows of 
more minute ones (VII. and VIII.) on some of the other folds of the same region. The 
paragnathi (IV.), again, at the base of the maxillae, form an indistinct, angular group of 
minute points on each side, and much less regular than in Nereis tongatabuensis. The 
maxillae are of a translucent straw colour, with a comparatively small belt of deep brown 
along the functional edge and tip, and the denticulated region is short. The tip of each 
organ is short and broad, and beneath are five or six small and rather acute teeth, which 
foUow the terminal fang without a break. 
The first four feet are less bulky than the fifth, and they present a general agreement 
with those of the preceding form. Large rounded lobes occur from the fifth to the ninth. 
The tenth foot (PI. XXXIV. fig. 11) has a shorter dorsal cirrus than in the species just 
mentioned, and the superior bristles have longer spinose tips. The processes of the foot 
also differ, the ventral lobe especially being rounded and more obtuse. The ventral 
cirrus is shorter. 
At the thirty-seventh foot (PI. XXXIV. fig. 13) the superior lobe is less elevated 
superiorly, and the dorsal cirrus shorter. The next lobe and the inferior setigerous 
division are similar. The inferior lobe also corresponds, but the ventral cirrus is shorter 
than in the previous form. In regard to the bristles, those of the superior division have 
longer tips, but the falcate appear to be the same, though no specimen is perfect. 
In the intestine are masses composed of pale greenish fragments of Algse, Confervse, 
and a few Diatoms. 
This form is closely related to Nereis tongatabuensis. It also comes near the 
Platynereis jucunda of Kinberg from Honolulu.^ Grube’s Nereis [Platynereis) fusco- 
1 Annulata Nova, qp. cit., p. 177. 
