. Discovery reports. Discovery (Ship); Scientific expeditions. 4° DISCOVERY REPORTS In addition to a number of small organisms entangled with the bristles, as described by Mcintosh (1885, p. 43) for his Kerguelen specimens, a sponge Homaxinella stipra- tumesceris, Topsent (I am indebted to my colleague, Mr M. Burton, for the name) is attached to the back of a specimen from St. 45. It is fixed to two adjacent notopodia and to the external edge of an elytron. Family POLYNOIDAE Genus Hermadion, Kinberg Hermadion ferox, Baird. cm Baird, 1865, p. 197. Hermadion rouchi, Gravier, 1911, pp. 82-86, pi.
. Discovery reports. Discovery (Ship); Scientific expeditions. 4° DISCOVERY REPORTS In addition to a number of small organisms entangled with the bristles, as described by Mcintosh (1885, p. 43) for his Kerguelen specimens, a sponge Homaxinella stipra- tumesceris, Topsent (I am indebted to my colleague, Mr M. Burton, for the name) is attached to the back of a specimen from St. 45. It is fixed to two adjacent notopodia and to the external edge of an elytron. Family POLYNOIDAE Genus Hermadion, Kinberg Hermadion ferox, Baird. cm Baird, 1865, p. 197. Hermadion rouchi, Gravier, 1911, pp. 82-86, pi. iii, figs. 33-34; pi. iv, figs. 45-51; pi. vii, fig. 74. St. 39. 25. iii. 26. East Cumberland Bay, South Georgia. From 8 cables S 8i°W of Merton Rock ^n to 1-3 miles N 7° E of Macmahon Rock. 179-235 m. Gear OTL. Bottom: grey mud. One specimen. St. 42. I. iv. 26. OiT mouth of Cumberland Bay, South Georgia. From 6-3 miles N 89° E of Jason Light to 4 miles N 39° E of Jason Light. 120-204 m. Gear OTL. Bottom: mud. Two specimens. St. 149. 10. i. 27. Mouth of East Cumberland Bay, South Georgia. From 1-15 miles N 76^° W to 2-62 miles S 11° W of Merton Rock. 200-234 m. Gear OTL. Bottom: mud. Two specimens. Remarks. I have examined Baird's type specimen and it agrees exactly with Gravier's admirable description and figures of Hermadion rouchi. From St. 42 there is a gigantic example (Fig. 6) with 60 chaetigers which measures 16 cm; by 6 cm. including the bristles. Benham (1921, pp. 46-50) makes a lengthy comparative study of this species and is at pains to show that it is distinct from Lagisca crosetensis. I have examined Mcintosh's type and I endorse Benham's conclusions. There is a tendency for H. ferox to grade into H. magalhaensi. The chief differences between '^' the two are the presence in H. ferox of the palisade of long dorsal bristles and of giant spines on the elytra. There is a considerable variation in the extent to which the dorsal bristles arch over the back, and i
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