POLY GELiETOU S ANNELIDS OF THE HAWAIIAN ISLANDS. 
1155 
Family ACOETID^E. 
Genus EUPANTHALIS McIntosh. 
Eupanthalis oah.uen.sis, new species. 
Of the three specimens (none entire) in this collection, only one retained any trace of antennae. 
Head roughly rectangular in outline, with anterior margin a little narrower than posterior; anteriorly 
on either side a rounded protuberance (sessile eye?), but no trace of pigment appeared (in alcoholic 
material) ; tentacles slender, a little shorter than head, arising from ventral surface of head. Owing to 
the poor preservation of the specimens, this is all that can be said concerning the head. What seemed 
to be the stump of a median tentacle appeared between the bases of the lateral. Palps long, gently 
tapering, smooth, diameter at base rather more than one-half that of head. 
Width at head, including anterior parapodia, 3 mm. This gradually increases, reaching, at 
somite 12, a diameter of 6 mm., but narrows again to about 3 mm. at somite 20, continuing at this 
width throughout the remainder of the fragment. 
Eupanthalis oahuensis, new species. (19) Second parapodlum, x 25; elyt., elytrophore; a. 1. andp. 1., anterior and 
posterior lobes; v. c., ventral cirrus. (20) Seta from second parapodium, x 165. (21) Third parapodium, x 25; lettering 
as in figure 20. (22) Seta from third parapodium, x 165. (23) Seta from posterior somites, x 260. 
Elytrophores on somites 2, 4, 5, 7, 9, 11, etc. Elytra very delicate, transparent, anteriorly barely 
more than covering dorsal surface of parapodium, behind about the twentieth somite, extending nearly 
to median dorsal line. Edge of elytra smooth, with no processes or lobings. 
Second parapodium elongated, the large neuropodium with a bilobed anterior (fig. 19, a. L), and 
a broader, more rounded, posterior lobe ( p . 1.). Notopodium very small, appearing as a small lobe 
on dorsal surface of neuropodium. Dorsally is a large elytrophore, elyt . , and ventrally a lanceolate 
cirrus, v. c. A large aciculum extends into the neuropodium, while a much smaller one terminates in 
the notopodium. From the base of the notopodium arises a bundle of very long, delicate setae, 
extremely attenuated at the tip. In the specimen figured were 12 of these. The larger ones have 
serrated, the smaller smooth, edges. Setae of ventral bundle much larger, their bases extending about 
as far as base of aciculum, and from the diameter of this; protruding portion narrower, flattened, 
and sharp pointed, the whole bent into the form of an elongated crescent; on concave side are 2 rows 
