Archive image from page 98 of Discovery reports (1936) Discovery reports discoveryreports12inst Year: 1936 APHRODITIDAE 83 carried very much further. The anterior four-fifths of the body is broadly oval, but the hinder fifth consists of a narrow caudal prolongation (Fig. 3). The largest specimen measures 50 mm. by 25 mm. at the widest part for 40 chaetigers and the smallest measures 17 mm. by 7 mm. for 35 chaetigers. There is a very small median tentacle, half the length of the head. There is a pair of rounded ocular areas each of which carries two minute black dots, which I take to be eyes.
Archive image from page 98 of Discovery reports (1936) Discovery reports discoveryreports12inst Year: 1936 APHRODITIDAE 83 carried very much further. The anterior four-fifths of the body is broadly oval, but the hinder fifth consists of a narrow caudal prolongation (Fig. 3). The largest specimen measures 50 mm. by 25 mm. at the widest part for 40 chaetigers and the smallest measures 17 mm. by 7 mm. for 35 chaetigers. There is a very small median tentacle, half the length of the head. There is a pair of rounded ocular areas each of which carries two minute black dots, which I take to be eyes. The dorsal bristles are long, rather slender, smooth and with delicate curved tips. They are covered with mud and lie obliquely along the back and with the naked eye are almost impossible to distinguish from the rest of the felting. This separates the present species from the much commoner A. australis, Baird, in which the dorsal bristles are much stouter, more abundant and more prominent. The extent to which the dorsal bristles are entangled with the felting is variable. They may be almost covered by it, or they may lie for the most part loosely above it. The ventral bristles are arranged in three rows in the usual manner. Towards the end they taper suddenly into fine, sharp- looking points, and the narrow tip is usually covered with hairs. In the first and second feet there are the usual hastate bristles and twisted bipinnate bristles and in the hinder region there are found hastate, denti- culated, bipinnate and spinous bristles as in other species. Remarks. I am satisfied that these specimens do not belong to A. australis and they agree well enough with Fauvel's redescription of the type of A. talpa, Quatrefages. Fauvel, however, makes no mention of the caudal prolongation which is a noticeable feature in the present specimens. They are very close to the specimen from the Palmer Archipelago attributed by me (1930, p. 37) to A. alta, Kinberg. They can be distin- guished by
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