CONTE 



Pag, 



I. Comparative anatomy of the nourishing individuals, and 



systematic division of the thecaphore hydroids i 



II. Thecaphore Hydroids of the Northern Atlantic 6 



Family series Hebellina ° 



Family Lafteidce 



Laftea (Lamouroux) 7 



Lafcea dumosa (Fleming) 7 



— gracillima (Alder) 9 



— fruticosa M. S a rs l2 



Toichopoma Levinsen I 5 



Toichopoma obliquum (Hincks ) '5 



Grammaria (Stimpson) l6 



Grammaria serpens (Hassall) i° 



— conferta (Alltnan) T 7 



_ dbietina (M. Sars) '8 



— immersa Nutting 22 



Lictorella (Allman) 22 



Lictortlla pinnata ( G. O. Sa rs ) 22 



Zygophylax Q u e 1 c h 24 



Zygophylax biarmata Billard 24 



Family Campanulinida 2 5 



Subfamily Cuspidellina 2& 



Stegopoma Levinsen 2 ° 



Stegopoma plicatile ( M. Sars ) 26 



Cuspidella Hincks 2 9 



Cttspidella humilts Hincks 2 9 



Lafoeina M. Sars 29 



Lafoeina maxima Levinsen 3° 



Campamilina van Beneden 3° 



Campanuhna turrita Hincks 3 1 



Subfamily Calycellina 3 2 



Calycella (Hincks ) : 3 2 



Calycella syringa ( L i 11 n e ) 3 2 



Tetrapoma Levinsen 34 



Tetrapama quadridentatum (Hincks) 34 



Family series Haleciina 35 



Family Haleciida 35 



Halecium Oken 35 



HaUcium halecinum ( L i n n e ) 3" 



— Beanii Johnston 38 



snitum Clark 39 



— curvicaule v. Lorenz 4' 



NTS 



p, 



Halecium muricatum Kllis and Solander) 43 



— labrosum Alder 45 



tenellum Hincks 46 



minutum Broch 50 



Family Plumulariida 5 1 



Kirchenpaueria ( Jickeli) 5 2 



Kirchenpaueria pinnata ( Li n n e ) 53 



Plumularia (Lamarck) 55 



Plumularia setacea ( L i n n e , 55 



Catharina Johnston 56 



Polyplumaria G. O. S a rs 5S 



Polyplumaria frutescens (Ellis and Solander) . 59 



flabellata G. O. Sars 59 



profunda ( Nutting) 60 



Xemertesia Lamouroux 62 



Nemertesia antennina ( L i n n e ) 64 



— ramosa Lamouroux 66 



Poly nemertesia nov. gen 69 



Poly nemertesia gracillima (G. O. Sars) 70 



Family AglaopJieniida 7 2 



Halicornaria (Busk) 7 2 



Halicornaria campanulata (Ritchie) 72 



Nematocarpus nov. gen 74 



Xematocarpus ramuliferus ( Allni an ) 74 



Aglaophenopsis (Fewkes) 77 



I '.mphenopsis cornuta { Verrill) 77 



— (?) pharetra nov. sp 80 



Cladocarpus Allman X2 



Cladocarpus integer G. O. Sars 1 82 



formosus Allman S5 



— Diana nov. sp 87 



bicuspis (G. O. Sars 89 



Tkecoi arpus Nutting 9 1 



Thecocarpus myriophyUum ( Linne ) 9 2 



[1 phenia (Lamouroux) 93 



aophenia tubulifera Hincks : 93 



Family series Sertulariina 94 



Family Sertulariida . 94 



Sertularella Gray . . 9 6 



Sertularella tamarisca (Linn 6) 9 6 



tricuspidata (Alder) 



— amphorifera Allman IOO 



