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DEPARTMENT OF THE JSAYAL SERVICE 



Halecium heani (Johnston). 



Trophosonie. Stem and main branches fascicled; 

 nodes oblique; hydrophore margin flaring little. 



Gonosome. Gonangia borne at the base of the 

 hydrophores ; male, regular oblong-oval ; female, mitten- 

 shape, aperture lateral ; two small hydranths are pre- 

 sent in the aperture. 



No. 60. 

 IJalecium beani. 



Halecium curvicaule Lorenz. 



Trophosome. Colony minute; no continuous main 

 stem; a single pedicel grows out from the stolon, just 

 below the hydrophore another pedical is given off, or one 

 on each side; these bend Upward almost at the base; each 

 of them may give rise to others in the same way until there 

 may be four or five sets of them ; each pedicel has an annu- 

 lation at its base or occasionally more than one; margin 

 of hydrophore flarmg but little. 



Gonosome. Male gonangium cylindrical; female pyri- 

 form, with terminal ai>erture from which two hydranths 

 appear, both almost sessile, borne on the ])edicel just below 

 the hydrophore. 



No. 61. 

 Ildlrcimji ciirvwauJe. 



Halecium gracile Verrill. 



Trophosome. Stem fascicled, much branched ; 

 branches long and slender ; internodes long and slender ; 

 margin of hydrophore flaring but little. 



Gonosome. Male gonangia oblong-ovate ; female 

 pyriform, emarginate; ai^erture terminal. 



No. 62. 

 Halecium gracile. 



Halecium halccinum (Linna'us). 



Trophosom,e. Stem fascicled, erect, rigid ; primary 

 branches fascicled, few ; secondary branches and pedi- 

 cels pinnately arranged; hydrophore margin not flaring. 



Gonosome. Gonangia arranged in rows on the 

 upper side of the branches; male gonangia obovate- 

 oblong; female pyriform; aperture elevated on a collar; 

 two hydranths in the aperture. 



