THE 



VOYAGE OF H.M.S. CHALLENGEE, 



ZOOLOGY. 



REPORT on the Polyzoa collected by H.M.S. Challenger during the 

 years 1873-76. By George Busk, F.R.S., V.P.L.S., &c. 



PART II.-The CYCLOSTOMATA, CTENOSTOMATA, 

 and PEDICELLINEA. 



INTEODUCTION. 



So much has been written of late years concerning the Polyzoa, that it is not possible for 

 me here to name all those to whom I have been indebted for assistance in the preparation 

 of this Report, but among the most important recent contributions to our knowledge of 

 all the three orders now under consideration, must be mentioned the valuable works 

 of Mr. Hincks ^ and Professor Smitt.' To M. L. Joliet * we owe papers, both anatomical 

 and descriptive, on the Polyzoa of the French Coast. Mr. P. H. INIacgillivray,* has 

 described and figured many new species of Cyclostomata belonging to the Australian 

 region. Mr. AVaters ^ has given descriptions of recent species from the Bay of Naples, as 

 well as of fossil Australian species ; and Dr. J. JuUien ® of species collected in the 



' Hincks, Brit. Mar. Polyz., 1880, and various papers in Ann. and Mag. Nat. Hist., &e. 



2 Smitt, Hafs-Bryoz. Uteckl. och Fettkr., 1864; Bryoz. Mar., 1867; Kritisk Forteckn., 1865, 1871; Florid 

 Bryoz., pt. i., 1872. 



3 Joliet, Les Bryozoaires des Cotes de France, Archives d. Zool. Exp^., t. vi., p. 193, 1877. 



* Macgilli-vray, P. H., Nat. Hist. Vict., dccaJos iv. and vii.; Proc. Roy. Soc. Vict., Polyzoa, parts iv. vi., vii., viii., ix. 

 « Waters, Ann. and May. Nat. Hist., ser. 5, vol. iii.; Quart. Journ. Geol. Soc, vol. il. p. 674, 1884. 

 " Jullien, Bull. Soc. Zool. de France, t. vii., 1882. 

 (zOOL. ClIALL. EXr. — PART L. — 1886.) Ddd a 



