Bucnanan—Report on Polychets. 175 
triplication, of organs on one side are not uncommon in Poly- 
cheets. Both Ehlers and Quatrefages, for instance, mention the 
occurrence of the same thing in Eunice gigantea. M*‘Intosh* 
mentions it in a Nothria. I have also occasionally noticed the 
duplication of an ordinary dorsal cirrus on one side in Eunice 
gigantea and other polychets. Perhaps the most striking ex- 
ample I have seen of the duplication of an organ on one side is in 
a Chiceia in the Royal College of Surgeons Museum, where there 
is a second perfect branchia smaller and nearer the dorsal median 
line than the ordinary one, on one side (the left), near the posterior 
extremity of the body (twenty-eighth segment). The branchiz 
of Chleia, being somewhat complex structures, this duplication 
is more remarkable than that of simple structures like cirri. 
The species would seem to be most nearly allied to the 
E. floridana of Ehlers,* but differs from it in the greater length 
of the dorsal cirri and in the possession of a smaller number of 
branchial filaments, also somewhat in the shape of the maxille. 
There were three small Hunices, one of only 20 mm. in length 
in the coral itself, another of about 30 mm. in the same bottle 
with the coral, and the third, of 86 mm., in a red serpulid tube, 
dredged with the coral. These I take to be the young of Eunice 
philocorallia. The jaws have the same six teeth each side, and are 
in other ways much alike. In the smallest specimen there is only 
a single filament to each branchia (except on a few segments here 
and there, where there are two), and this is almost as long as the 
dorsal cirrus in some segments. The same variation in the length 
of the tentacles occurs as in the adults, the right inner lateral 
tentacle being a good deal—longer than the median or than any of 
the other tentacles. In the same way, the right tentacular cirrus 
of the second segments is longer than the left. In the other two 
specimens the branchie, except in the first few segments after 
their appearance at all, have two filaments, and occasionally even 
three. I have figured the head and one parapodium of the largest 
of these three specimens (PI. x., figs. 8 and 9). 
13 Ehlers, ‘“‘ Borstenwtirmer,” p. 311. 
14 «¢ Quatrefages,’’ Annélés, vol. 1., p. 312. 
15 M‘Intosh, ‘‘ Challenger Report,’ x11., p. 328. 
16 Ehlers ‘‘ Report on Dredging, &c.,”’ doc. cit. p. 88, pl. xxii. 
