THE 



VOYAGE OF H.M.S. CHALLENGEK. 



ZOOLOGY. 



REPOET on the Hydroida dredged l.y H.M.S. Challenger during the 

 years 1873-76. By Professor G. J. Allman, M.D., LL.D., 

 F.R.C.S.I., F.R.SS.L. & E., M.R.I.A., C.M.Z.S., &c. 



PART I.— PLUMULARID^. 



INTRODUCTION. 



In the descriptive zoology of the Plumularidje a considerable amount of literature 

 already exists. The British species have, in more recent times, been studied by several 

 observers, and more especially by Hincks,^ whose valuable History of the British 

 Hydroid Zoophytes has greatly facilitated the labours of such zoologists as have since 

 worked at species from other seas. Among the more important recent contributions to 

 our knowledge of foreign forms must be mentioned the descriptions given by Busk,^ of 

 the species collected during the exploratory expedition of the " Rattlesnake " ; the memoirs 

 by Kirchenpauer,^ in which a large number of new species contained in various 

 continental collections has been described and figured ; and that by G. Ossian Sars,* in 

 which we find descriptions and figures of many new and interesting Plumularidse from 



1 A History of tlie British Hydroid Zoophytes, by Thomas Hinoks, London, Van Voorst, 1868. 



" Narrative of the Voyage of H.M.S. " Rattlesnake," London, 1852. Account of the Polyzoa and Sertularian Zoo- 

 phytes, hy George Busk, Appendix, vol. i. 



3 Kii-chenpauer, Ueher die Hydroidenfamilie Plumularidse. Abliandl. aus der Gehiete der Naturwiss. von dem 

 naiunoiss. Verein in Hamburg, Bd. v., vi., 1872 and 1876. 



* G. 0. Sars, Bidrag til Kundskabeu om Norges Hydroider. Forhandl. Vidmsk. Selsk. i Cluistinia, Aar 1873. 



(ZOOL. CHALL. EXP. — PART XX. — 1883.) U 1 



