Leodicidm from Fiji and Samoa. 



167 



hintere mediane," while Mcintosh's description of the type is that "superiorly the 

 free edge of the foot presents two prominent mammilla?, between which the bristles of 

 the region emerge." This is not in entire agreement with his figure, but is quite in 

 accord with the conditions found in the Samoan and Hawaiian specimens and quite 

 unlike those described by Augener. Augener followed Benham in his identification 

 of his specimens \\dth those of Mcintosh and Tread well, explaining the differences as 

 due to poor preservation. It seems to me evident that the species described by 

 Benham and Augener are not the same as the ones I have seen from Hawaii and Samoa, 

 which I regard as belonging to Mcintosh's species. 



Several specimens were collected on Aua reef in Pago Pago Harbor in rocks near the 

 upper end of the harbor and one on the reef at Aunuu. They are very sensitive to 

 changes in the water and most of them died before they could be got to the laboratory. 

 In the living animal the prostomium has a faint pink color on the anterior margin, but 

 this fades out on the dorsal surface. The palps are 

 colorless or only faintly tinted with pink. The peristo- 

 mium is pink, this color being most intense along the 

 posterior edges of the antero-lateral depressions and on 

 the "caruncle." The first 6 somites show a pink color 

 which is most intense along the anterior margins, but 

 behind the region of somite 6 the pink color disappears 

 and is replaced by a decided yellow. No color persists 

 in the preserved material. 



The prostomium is rounded (plate 8, fig. 1), not more 

 than one-third the diameter of the peristomium. The 

 palps are large, thick at the base, unjointed, and with 

 rather blunt tips. The tentacles are less than half the 

 diameter of the palps at the base and not more than 

 three-quarters as long as they, and are jointed only 

 toward the apices. There are two pairs of eyes — the 

 dorsal ones the smaller, the larger ventral ones visible 

 from the dorsal surface only through the translucent 

 bases of the tentacles. Both pairs of eyes are very 

 black. The peristomium is rectangular in outline, but 

 with a deep depression on either side on the dorsal 

 between these two depressions is continued forward 

 belongs to the prostomium, the whole forming a sort of caruncle. 



The first parapodium (plate 8, fig. 2) has a rounded setal lobe, with hps equal in 

 length. The dorsal cirrus is 2-jointed, the basal joint much the longer. The ventral 

 cirrus is rather large, joined for about half its length to the setal lobe. There is a 

 heavy acicula in the setal lobe and a tuft of needle setse in the dorsal cirrus. There are 

 two tufts of setae, the dorsal ones simple and the ventral ones compound. In the 

 tenth parapodium (plate 8, fig. 3) the parts are all larger, but the relative forms are 

 about as before, except for an increase in the vertical diameter of the setal lobe. 

 There are a dorsal and a ventral tuft of setse with aciculae as in the first parapodium. 

 The pygidium is rounded, with one pair of long anal cirri (plate 8, fig. 4). 



The dorsal setse are long and curved, with minute denticulations along the convex 

 margin and very small terminal teeth at the end (text-fig. 65). Ventral to these is a 

 row of stouter setse with serrated convex margin and apical and subapical teeth covered 

 by a hood (text-fig. 66). Ventral to these are compound setae having smooth basal 

 joints; the terminal joints have each a large apical and a smaller subapical tooth, the 

 whole covered by a hood (text-fig. 67). 



The maxilla has the form characteristic of this genus, composed of two rows of 

 plates on either side, with from 35 to 40 plates in each row, the rows from opposite 



Text-Figures 65 to 68. 



Dorvillea australiensis. 65, 

 dorsal simple seta X 250; 66, 

 ventral hooded seta X 250; 67, 

 compound seta X 250; 68, one 

 half of maxilla X 12.5. 



surface, 

 to join 



The 

 with a 



median ridge 

 knob which 



