182 
THE VOYAGE OF H.M.S. CHALLENGEE. 
Greeffia (Nauphanta ^), Greeif. 
Greeffia oahuensis, n, sp. (PL XXVIII, figs. 5, 6, 7 ; PI. XXXII. fig. 11 ; PL XVa. 
fig. 4). 
Habitat . — From the surface of the sea, off Honolulu, Sandwich Islands, July 1875 ; 
surface temperature about 76°‘0. 
The example is broken, but seems to reach about 33 mm. in length and 6 ‘5 mm. in 
breadth. 
The body is slightly tapered toward the front, and furnished laterally with a series of 
conspicuous and massive lamellse, which somewhat resemble those in Notophyllum. The 
dorsum is pale brownish, marked along each side by the dark olive-brown glands at the 
bases of the feet, and a smaller (“ segmental ”) gland of the same kind occurs at the 
posterior border of the foot ventrally. The body tapers considerably towards the tad, 
which, however, is incomplete. The head (PL XXVIII. fig. 5) is wider than the neck, 
and has two very large pale brown lateral eyes with the cornese directed outward. A 
bridge of tissue occurs between the eyes at the posterior border of the head, and 
from the groove or hollow in front of it arises a short flattened tentacle of a somewhat 
ovate form. A well-marked isthmus exists between the eyes in front, and forms an 
anterior promontory with a somewhat crenated edge. This promontory bears four 
antennae, two at the external angles and two a little within and slightly below the 
former. The eye has a large cornea, which at its margin presents a sheen like the 
tapetum, of a brownish-red hue. The lens appears to be median. The prominent 
lateral position of the eyes probably gives very extensive vision^ — forward, outward, and 
backward. Ventrally (fig. 7) the two long proboscidian tentacles project conspicuously 
from the mouth. Close behind the eye interiorly is a short subulate cirrus, probably 
attached to the buccal segment, and immediately succeeding is another pair of similar 
organs on each side. Greeff describes four pairs in his Nauphanta celox. 
The segment following the foregoing bears an upper larger and smaller inferior 
lamella, both ovato -lanceolate, and a speck of pigment at the base posteriorly, but no 
setigerous region. The next segment shows a great increase in the lamellae, the superior 
being broadly cordate. A small papilla near the upper border of the inferior lamella 
indicates the setigerous division, and an elevated brownish papilla indicates the superior 
“ segmental ” gland. At the eighth foot (from the first lamelligerous somite) the first 
trace of the inferior “ segmental ” gland occurs as a minute pigment-speck a short 
distance below the dorsal one. The setigerous lobe now bears bristles. The dorsal 
1 Prof. Haeckel has employed this generic name (Nauphanta) for one of the deep-sea Medusae procured in the same 
Expedition, Monographie der Medusen, Th. ii. p. 87, 1879 and 1881 ; System der Medusen, No. 452, p. 487, 1879 ; and 
Zool. Chall. Exp., part xii. p. 103, 1881. The same term had formerly been used hy Kinberg in 1864 for a genus of the 
Eunicidse, while Greeff applied it in the present group. 
