HYDR0ID8 OF EASTERN CANADA 



L79 



No. 105. 



Cladocarpus pourtalesi 

 (after Nutting). 



Cladocarpus pourtalesi Verrill. 



Trophosome. Stem fascicled, irregularl.v branched, the anterior tube bearing 

 the hydrocladia; hydrocladia closely approximated, alternate, divided into regular, 

 short internodes, each with three or four septal ridges; 

 hydrothecae closely approximated, broader towards mar- 

 gin; margin entire; intrathecal ridge short, curved 

 sharply upward; supracalycine and mesial nematophores 

 stout, cauline nematophores numerous. (From Nut- 

 ting's descript^'on.) 



Gonosome. " Gonangia oblong-ovate, with lunate, 

 sub-terminal aperture, borne on an unbranched phylac- 

 togonium springing from the side of the base of the 

 proximal hydrotheca of the hydrocladium ; there are 

 from one to fi.^e gonangia to each phylactogonium " 

 (Nutting). 



Cladocarpus speciosus Verrill. 



Trophosome. Stem fascicled, distal portion simple, 

 divided into long internodes, each with a hydrocladium 

 from near the middle; hydrocladial internodes witli 

 seven septal ridges; hydrothecae short, widening from 

 base to mai'gin; margin with two rounded anterior 

 teeth and four or five shallow teeth on each side; intra- 

 thecal ridge low, straight, horizontal; supracalyc'ne 

 nematophores and mesial, with crenulated margin, 

 cauline nematophores four to each internode. (From 

 Nutting's description.) 



Gonosome. " Gonangia not known, phylactogonia 

 branched, arising from the side of the proximal hydro- 

 thecae and not morphologically a modified mesial nema- 

 tophore, the latter being present" (Nutting). 



No. 106. 



Cladocai-pus speciosus 

 (after Nutting). 



Genus Pluhularia. 



Trophosome. Hydrocladia unbranched, pinnately arranged, each having more 

 than one hydrotheca; hydrothecae with entire margin; all nematophores movable. 



Gonosome Gonangia without extra protection. 



Plum'ularia setaceoides Bale. 



Trophosome. Stem simple, unbranched, divided into regular internodes, each 

 of which gives off a hydrocladium distally; two to four annulations above each node; 

 hydrocladia slender, recurved; non-hydrothecate and 

 hydrothecate internodes alternating, each with two or 

 three internal ridges; hydrothecae cup-shaped, about 

 one-third free; supracalycine nematophores present, 

 one nematophore below the hydrotheca, one on each 

 intermediate internode, one in the axil of each hydro- 

 cladium and one on each cauline internode. 



Gonosome. Gonangia very large, on the face of the 

 stem at the base of the hydrocladium, obovate, curved, °" 



truncate, several distinct, though not deep corruga- Plumularia setaceoidea 

 tions. 



