OCR Text |
Show 1868.] DR. W. BAIRD ON THE GEPHYREA. 101 (Anus dorsalis.) 1. ASPIDOSIPHON MULLERI. Sipunculus (Phascolosomum) scutatus, Joh. Miiller, in Wiegm. Archiv, torn. xix. p. 166-168, t. 5. f. A-D, 1844; Krohn in Miill. Archiv, p. 371, 1851. Aspidosiphon mulleri, Diesing, Syst. Helminths ii. pp. 68 & 556 ; Revis. der Rhyngod. l.c. p. 767, 1859; Quatrefages, I. c. p. 609, 1865; O. Schmidt, Mitth. Nat. Verein. Steirmark, p. 56, 1865. Lesinia farcimen, O. Schmidt, Zeitsch. f. d. gesammt. Natur-wiss. 1854, vol. iii. p. 2, t. 1. f. 3; Diesing, Revis. der Rhyngod. 1. c. p. 779, 1859 ; Quatrefages, I. c. p. 599, 1865. Hab. Mediterranean (Grohmanfy Krohn); Lesina (Schmidt); off the Shetland Isles (J. G. Jeffreys). B.M. Notwithstanding the difference of habitat, I cannot distinguish any marks by which to separate our specimen from the species found in the Mediterranean. It is perhaps less narrow posteriorly; and the small brown points or papillae, as Diesing terms them, on the body, are smaller than in the species figured by Miiller. The Phascolosoma radiata of Alder, found in the same locality, and described by him in the ' Annals and Magazine of Natural History' in 1860, approaches in some respects this species, and may possibly be synonymous with it. The description given by Mr. Alder is rather indefinite, and a further examination of fresh specimens is necessary to elucidate the point. 2. ASPIDOSIPHON STEENSTRUPII. Aspidosiphon steenstrupii, Diesing, Revis. der Rhyngod. I. c. p. 767, 1859 ; Icon. Zoogr. Ferdinand. I. Imperatoris ; Quatrefages, I. c. p. 610, 1865. Hab. Island of St. Thomas, West Indies (Riise fide Diesing). 3. ASPIDOSIPHON RHYSSASPIS. Aspidosiphon rhyssaspis, Diesing, Revis. der Rhyngod. I. c. p. 768, 1859 ; Icon. Zoogr. Ferdinand. I. Imperatoris; Quatrefages, l.c. p. 610, 1865. Hab. West Indies (Suenson fide Diesing). 4. ASPIDOSIPHON EREMITA. Aspidosiphon eremita, Diesing, Revis. der Rhyngod. /. c. p. 768, 1859; Icon. Zoogr. Ferd. I. Imperat. ; Quatrefages, /. c. p. 610, 1865. Hab. Madeira (Dr. Lister) ; inhabiting empty shells of Ditrupa (Diesing). B.M. 5. ASPIDOSIPHON COYI. Aspidosiphon coyi, Quatrefages, I. c. p. 608, 1865. Hab. Indian seas? (Quatrefages). |