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Show 56 ON GEPHYREAN WORMS FROM CHRISTMAS ISLAND. [Jan. 17, Islands. Selenka's specimen was taken at Bahia, 7-20 fathoms; Mr. Andrews's at Christmas Island. SlPUNCULOIDEA. ASPIDOSIPHON Grube. 2. ASPIDOSIPHON R A V U S Sluiter. Sluiter, Natuurk. Tijdschr. Nederl. Ind., Bd. xli. 1881, p. 495. Shipley, Zool. Results etc. Willey, Cambridge, pt. ii. 1898. A single specimen from Christmas Island extends the range of this species. Dr. Willey collected it at Sandal Bay, Lifu, and Sluiter, who described the species, records it amongst the Malay Gephyrea, but unfortunately gives no more precise locality. CLOSOSIPHON Grube. 3. CLOJ;OSIPHON ASPERGILLUM Quatrefages. Quatrefages, Histoire Naturelle des Anneles, vol. ii. 1865, p. 605. Grube, Jahresber. Schlesisch. Ges. 1867, p. 48. Selenka, Die Sipunculiden, Wiesbaden, 1883, p. 126. Fischer, Zoolog. Forschungsreisen in Australien, Semon, vol. v. 1896, p. 338. Shipley, Zoological Results etc. Willey, Cambridge, pt. ii. 1898. A single small specimen measuring some 2 cm. in length. Dr. W . Fischer has recently recorded it from Thursday Island, Samoa, whence it extends throughout the south-west Pacific and Indian Oceans. PHYSCOSOMA 1 Selenka. 4. P H Y S C O S O M A MICRODONTOTON Sluiter. Sluiter, Natuurk. Tijdschr. Nederl. Ind., Bd. xlv. p. 506. Shipley, P. Z. S. 1898, p. 471. One specimen, which, like those collected by Mr. Stanley Gardiner at Funafuti and Rotuma, was very much longer than the examples described by Sluiter. He, however, found no reproductive organs, so that it is possible his form was immature and not fully grown. The characteristic long nephridia reaching to the posterior end of the body-also found in Ph. pacificum-are well marked. 5. PHYSCOSOMA SCOLOPS Selenka & de Man. Selenka, Die Sipunculiden, Wiesbaden, 1883, p. 126. Shipley, P. Z. S. 1898, p. 468. Shipley, Zoological Results etc. Willey, Cambridge, pt. ii. 1898. 1 Zool. Auz. vol. xx. 1897, p. 460. |