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Show 92 DR. W. BAIRD ON THE GEPHYREA. [Feb. 13., to the foregoing (P. perlucens), that it was found burrowing like it in holes in coral-rocks. 11. PHASCOLOSOMA NODULIFERUM. Phascolosomum noduliferum, Stimpson, Proc. Acad. Philad. torn. viii. p. 375, 1855 ; Diesing, Rev. der Rhyngod. I. c. p. 761, 1859. Phascolosoma noduliferum, Keferstein, Beitr. in I. c. p. 198, 1865. Sipunculus (Phymosomum) nodulosus, Quatrefages, I. c. ii. p. 621. no. 30, 1865. Sipunculus (Phymosomum) noduliferus, Quatrefages, l.c. ii. p. 624. no. 42, 1865 *. Hab. Australia, Sydney (J. M'Gillivray) ; Nicol Bay, north coast of Australia (M. de Boulay); Australia (J. B. Jukes, Esq.). B.M. 12. PHASCOLOSOMA AGASSIZII. Phascolosoma agassizii, Keferstein, Nach. d. kon. Gesellsch. der Wissensch. in Gottingen, 1866 ; Zeitsch. fiir wissensch. Zool. Band .xvii. Heft i. p. 4G, t. 6. f. 3-8, 1867. Phascolosoma Hawkinsii, Baird, M S . in Mus. Brit. Hab. California and Panama (Agassiz fide Keferstein) ; Esquimalt Harbour, Vancouver Island (Lieut.-Col. Hawkins). B.M. I had named this species after Lieut.-Col. Hawkins, H.M. Commissioner on the North-American Boundary Survey, who collected the specimens, and to whom we are indebted for them. There are two specimens, one much more slender than the other. This has the exsertile portion protruded; the other has it withdrawn, which may account for the difference in circumference. 13. PHASCOLOSOMA LORDI, sp. nov. Corpus brevifusiforme, griseum, transverse rugosum, granulis parvis fuscis obsitum, ad extremitatem posteriorem coacervatis, ad extremitatem anteriorem sparsis; pars exsertilis cylindrica, brevis, rugibus circularibus circumdata. Long. corp. 1 une, part, exsert. 4 lin. Hab. Esquimalt Harbour, Vancouver Island (J. K. Lord, Esq.). B.M. The body of this animal is of a greyish colour, wrinkled across with transverse rugae, or, as it were, corrugated. The skin is covered with very small light-brown granules, which at the posterior extremity are larger, darker-coloured, and more numerous, and at the anterior extremity are very few and scattered at intervals. The exsertile portion is rather short, cylindrical in form, and rugose. The tentacles are withdrawn. We'have only one specimen of this species, which differs very much from the preceding in general appearance, size, and colour, though collected at the same place. I have named it after Mr. J. K. Lord, who was the naturalist attached * Quatrefages has, evidently in mistake, quoted this species twice over, but has, in the first instance, given it the name of nodulosus. The synonyms he has quoted are the same in both instances. |