S3 8 37. Hutchin. 2.THALASSI0PHYTJE. Pl.cell.apk - 
15. Hutchinsia parasitica. Parasitic hut chins- 
Threads doubly pinnate, rather stiff, brownish red ; seg- 
ments and lobes alternate; joints not quite so long as broad* 
Conferva parasitica, Huds. FlAngl. 604 ; Engl. Hot. 1429; Dillw. 87. 
Hutchinsia Mostingii, Lyngbye Hydr. Dan. 116? 
Sea-shore; on marine plants. 
Thallus 1 or 2 inches long, slender; twigs pointed, 
gradually smaller ; thecce oblong, axillary, pedicelled. 
16 . Hutchinsia Brodicei. Brodie’s hut chins. 
Threads very much branched, purplish black ; branches 
long; twigs scattered, spreading, many-cut, in bundles; 
joints of the branches obsolete, or the twigs rather longer 
than broad. 
Conferva Brodiaei, Dillw. Conf. 107 ; *Engl. Bot. 2589. 
Thallus 1 or 2 feet long, repeatedly and finely branched; 
thecce lateral or axillary. 
17. Hutchinsia pulchella. Pretty hutchins. 
Thallus much branched, round ; braiiches and twigs 
ascending, alternate, close, pointed, simple or 2-cut ; joints 
shorter than broad. 
Fucus cristatus y, Turner Hist. Fuc. 48. 
Fucus cristatus* Engl. Bot. 1925. 
Sea-shores. 
Thallus 2 or 3 inches high, compressed, repeatedly alter- 
nately branched. 
XIII. 38. VERTEBR ATA. Backbone . 
Thallus round, forked, branched, smooth ; axis central, 
jointed; joints composed of many tubes, with a cewtral 
opake spot; thecce ovate, lateral, or in the tip of the twigs. 
Vertebrata fastigiata. Even-topped backbone. 
Threads forked, even-topped ; joints half as long as 
broad, with a central black spot. 
Conferva marina geniculata ramosissima lubrica, brevibus ct paltnatim 
congestis ramulis, Dillen in Raii Syn. 61, 24. 
Conferva marina, nigra palmata, Dillen Muse. 32. 
Conferva polymorpha, Lin. S. P. 1636; Engl. Bot. 1764; Dillw. 44. 
Fucus lanosus, Lin. Syst. Veg. ed. 13, 815. 
Ceramium fastigiatum, Roth Cat. 2, 175. 
-Hutchinsia fastigiata, Agardh Syn. 53. 
Sea and mouths of rivers; parasitic on fuci. 
