POLY CHA3TOUS ANNELIDS OF THE HAWAIIAN ISLANDS. 
1173 
Family STAUROCEPHALID^. 
Genus STAUROCEPHALUS Grube. 
Staurocephalus australiensis McIntosh. 
Staurocephalus australiensis McIntosh, Report Challenger Exp., vol. xii, p. 232, pi. xxxvi,fig. 6, pi. XVII A, figs. 9, 10. 
The present collection includes two specimens, one an adult female with eggs, which retained its 
tentacles,. the other smaller and badly mutilated. I have identified the species from McIntosh’s 
description of the parapodia and setae. To his description I can add the following: 
Head rounded, with large anterior and small posterior eyes (fig. 63, of smaller, imperfect speci- 
men) . Antennae slender, tapering, about three times as long as head. Palps thick at base, tapering 
to slender apex (fig. 64). In the preserved specimen each is tightly coiled on the side of the head. 
Prostomium 1 mm. broad. Peristomium 5 mm. broad. Proboscis stout, with black teeth at apex. On 
dorsal surface of proboscis, just below palp, a small tubercle on either side. 
Peristomium five times as broad as prostomium, and about two times as long. In preserved speci- 
men it extends on either side to anteripr border of prostomium. Behind latter is a broad depressed 
area, with its posterior lateral angles elongated toward side of body. In the middle of this space is a 
small papilla which extends forward over the prostomium (p. fig. 64. ) 
Fig. 63. 
a be 
Fig. 66. 
Staurocephalus australiensis. (63) Mutilated head showing eyes, x 7. (64) Entire head, x 8.5. (65) Mandibles, x 23. 
(66a) Tooth of inner row of maxillary apparatus, x 115. (66b) Tooth of outer row, x 115. (66c) Tooth of middle row, 
x 115. 
Mandibles jet black (fig. 65) with minute black pieces at either side their dorsal end, imbedded 
in a thin translucent “wing” of material that extends down side of mandible. Maxillary apparatus 
of two double rows of teeth, an inner row with teeth like figure 66 a, and an outer like figure 66 b. 
In each row the teeth progressively diminish in size and in the number and size of their lateral den- 
ticulations from ventral toward dorsal surface. Between the two rows, on at least the right side, is 
one or two rows of teeth (like figure 66 c) which apparently do not reach the surface, and may be 
younger teeth, forming to take the place of the others. 
McIntosh describes a difference between the superior and inferior setae of the upper group, the 
former tapering, flattened toward the tip, the latter less attenuate, and notched at the end (see his 
pi. xvn A, fig. 9). In these specimens the superior setae correspond to McIntosh’s figures of the 
inferior ones, while the inferior setae are shorter, broader, with bifid tip and guard, like those of ter- 
minal joints of setae of ventral bundle. Ventral setae as in McIntosh’s description. 
Collected at station 3873, 32-37 fathoms, on coral pebbles, and from station 4034, 28-14 fathoms, 
on fine coral sand and foraminifera. 
