HYDUOII) ZOOPHYTES. 



I 'AM. TUBULARIIDAE. 



7'iibnlaria mlphii, Bale. 10-20 fathoms. 

 Tiilmlaria hodifsoni, sp. n. l:!0 fathoms. 

 T ub ul aria longstujfii, sp. n. 121 fathoms. 



FAM. CORYNIDAE. 



Two undetermined species. 0-20 and 100 fathoms. 



FAM. CORYMORPHIDAE. 



Lampra parvula, sp. n. lo-2o fathoms. 



Lanijira microrhiza, sp. n. E. end of Barrier. 300 fathoms. 



FAM. MYRIOTHELIDAE. 

 Myriothela (?). 



CALYPTOBLASTEA. 

 FAM. SERTULARIIDAE. 



Sertularelln spiralis, sp. n. l:!o fathoms. 



Sertularella plectilis, sp. u. o-loO fathoms. 



Dictyodadium fuscum, sp. u. Coulman Island, x-15 fathoms. 



FAM. PLUMULARIIDAE. 

 Plumularia glac/aUs, sp. n. E. end of Barrier. 100 fathoms. 



FAM. C'AMPANULARIIDAE. 



SUB-FA M. CAMPANULABIINAE. 



Gampanularia verticillata, LinusL-us. New variety. 10-20 fathoms. 

 Campanularia everta, Clark. 0-2 o fathoms. 

 ( 'iini/ianiiJaria laevis, Hartlaub. 0-20 fathoms. 



SUB-FAM. HALECIINAE. 



Hdleeium arboreum, Allman. E. end of Barrier and McMurdo Bay. 0-130 fathoms. 

 Halecium tenellum, Hincks. 10-20 fathoms. 



SUB-FAM. LAFOEINAE. 

 Lafoiiina lonyitheca, Jiiderholm. 0-20 fathoms. 



FAM. EUCOPIDAE. 



Obelia geniculata, Linna2iis. Auckland Islands. 

 Campanulina (A). o-2o fathoms. 

 Campantdina (B). 0-20 fathoms. 



THE CLASSIFICATION ADOPTED. 



Oue of the greatest difficulties that the systematic zoologist has to meet iu writing 

 mi account of a collection of Ilydrozoa is the determination of the system of classifica- 

 tion that he will adopt. There are so many different opinions as to the relative 

 systematic value of the characters presented by the hydrosome and gonosome 

 respectively, and our knowledge of the extent of the modification of these characters 

 by environmental conditions is so imperfect that every system of classification that 



2 c 2 



