84 
THE VOYAGE OF H.M.S. CHALLENGER. 
considerably from the Aphroditidse in the structure of the head, the arrangement of the 
eyes, the armature of the proboscis, the form of the bristles, the presence of the 
antennse (lateral tentacles of Grube), and other points, including the relationships of the 
great nerve-cords (which in the Aphroditidse have the ganglia of the three first feet sepa- 
rate, i.e., not united by transverse commissures), while such features are coaimon to the rest. 
Taking the known facts into consideration, it wonld appear to be prudent at present to 
leave the various groups above mentioned in separate families as Malmgren has done. 
The family of the Aphroditidse is well represented in the collection, as may be 
inferred when it is stated that Kinberg in his Annelids of the Voyage of the Swedish 
frigate “ Eugenie ” mentions seven ; that only two are noticed by Grube in Semper s 
great Philippine collection, and the same number (two) amongst the Annelids dredged in 
the German exploring ship “ Gazelle” ; further, that none occur in the same author’s 
Annulata CErstediana, and none in Schmarda’s series ; while the present collection affords 
no less than thirteen. 
All the Aphroditidse are deep-water forms, a feature at once dividing them from the 
other groups formerly mentioned. They are evidently active feeders, though their 
opportunities for such may sometimes be limited. 
Mr. HaswelG has recently added to our knowledge of the segmental organs of 
Aphrodita. Their external apertures, he observes, are situated on the ventral surface 
close to the base of the parapodia, but there is no perforated papilla as in Polynoe. The 
segmental organs consist of small, flattened, and somewhat sigmoid sacs. 
Aphrodita, Linnaeus. 
Aphrodita acideata, Linnaeus. 
Habitat. — Dredged by H.M.S. “Knight Errant,” in the Faeroe Channel at Station 7, 
August 12, 1880, in 530 fathoms; bottom temperature 46° '5, surface temperature 5 7°; 
ooze. A small specimen. 
AjAirodita australis, Baird (PL VII. figs. 6, 7 ; PI. VIa. figs. 4-7). 
Aphrodita australis, Baird, Journ. Linn. Soc. Lond., voL viii. p. 176, 1865. 
Habitat. — Dredged at Station 163b, off Port Jackson, Australia, 3rd June 1874; 
lat. 33° 51' 15" S., long. 151° 22' 15" W. ; depth, 35 fathoms; bottom temperature 63°, 
surface temperature 69° ; hard ground. 
The single young specimen is about 26 mm. in length and 18 mm. in breadth. 
Contrasted with an example of Aphrodita acideata of the same length, it is very much 
broader, wdiile the more abundant lateral hairs give it a woolly aspect. The dorsal felt 
1 Proc. Linn. Soc. N. S. Wcdes, vol. yii. p. 608. 
