[I7 1 ] THE HYDROIDS 189 



CAMPANULARIA. 



Trophosome. Colony unbranched or regularly branched ; stem 

 simple or fascicled ; hydrothecae campanulate, never completely ses- 

 sile nor with operculum. 



Gonosome. Gonophores producing planulae without the interven- 

 tion of medusae. 



CAMPANULARIA VERTICILLATA (Linn.) 



Sertularia verticillata LINN., Syst. Nat., loth ed., p. 811, 1758. 

 Campanularia verticillata SARS, Bidrag til Kundskaben om Norges Hydroider, 



p. 46, 1873. VERRILL, Preliminary check-list of Marine Invertebrates 



of Atlantic Coast, p. 16, 1879. 



Distribution. Kadiak, Alaska (Harriman Exped.) ; North Cape, 

 Norway (Sars) ; New England Coast (Verrill). 



CAMPANULARIA DENTICULATA Clark. 



Campanularia denticulata CLARK, Proc. Acad. Nat. Sciences, Philadelphia, 

 p. 213, 1876. 



Distribution. Orca, Alaska (Harriman Exped.); Port Etches, 

 Alaska (Clark). 



CAMPANULARIA LINEATA Nutting. 



Campanularia lineata NUTTING, Hydroida from Alaska and Puget Sound, 

 Proc. U. S. Nat. Mus., Vol. xxi, p. 744, 1899. 



Distribution. Berg Inlet, Glacier Bay, Alaska (Harriman Ex- 

 ped.) ; Puget Sound (Nutting). 



CAMPANULARIA RITTERI sp. nov. 

 (Plate xvn, fig. 5.) 



Trophosome. Colony usually consisting of unbranched pedicels 

 growing directly from a creeping rootstock. Pedicels long and 

 slender, usually with a single distinct annulation at the distal end just 

 below the hydrotheca and about three less distinct ones at the proximal 

 end, the middle portion not being annulated. Hydrothecae cylindrical, 

 large, delicate in structure and with a perfectly even rim. 



Gonosome. Unknown. 



Distribution. Juneau, Alaska, 20 fathoms. Collected by Prof. 

 Wm. E. Ritter to whose efforts the fine series of Hydroids here dis- 

 cussed is so largely due, and for whom this species is named. 



CAMPANULARIA SPECIOSA Clark. 

 (Plate xvin, fig. 3, Plate xix, fig. 3.) 



Campanularia speciosa CLARK, Proc. Acad. Nat. Sciences, Philadelphia, p. 

 214, 1876. LEVINSEN, Meduser, Ctenophorer og Hydroider fra Gron- 

 lands Vestkyst, p. 25, 1893. 



