PL cell. apk. 2.THALASSIOPHYT7E. 37. Hutchin. 337 
11. Hutchinsia nigra. Black hut chins. 
Threads branched, reddish black; branches long; twigs 
short, awlshape, distant, generally many-cut, nearly pencil-, 
shape ; joints of the stem longer than broad, of the twigs 
as long. 
Conferva nigra, ITuds. FI. Angl. 595 ; Engl. Bot. 2340,* Dillw. Syn. 86. 
Conferva atrorubescens, Dillw. Conf. 70. 
Hutchinsia atrorubescens, Agardh Syn. 58. 
Sea-coasts; July. 
„ Plant black when dry ; joints composed of S or 10 veins; 
thecce ovate, sometimes pedicelled. 
12. Hutchinsia denudata. Naked hutchinsia . 
Threads very much branched, spreading, brownish; 
branches scattered, divaricating, long, distant; joints rather 
longer than broad. 
Conferva denudata, Dillw. Syn. 85. 
Hutchinsia divaricata, Agardh Syn. 59 ? 
Sea- shore. 
T hall us *2 to 4? inches long; threads repeatedly branched ; 
branches issue almost at right angles; twigs pointed, very 
long, slender. 
13. Hutchinsia Griffithsiana. Griffiths' hut chins. 
Threads repeatedly branched, pale red; branches spread- 
ing; twigs solitary or clustered, very short, simple, awl- 
shape; joints as long as broad; thecce on the twigs, some- 
times aggregate. 
Conferva Griffithsiana, Engl. Bot. 2312. 
Sea-shores; March. 
Thallus 3 or 4? inches high, when dry dark brownish 
green, when in decay light green. 
14. Hutchinsia byssoides. Byssus hut chins. 
Threads more than twice pinnated, weak, red ; segments 
and lobes alternate; lobes gradually smaller, many-cut, 
pencilshape; lower joints long, upper short; thecce sessile. 
Fucus byssoides, Tr. Lin. Soc. 3, 229. 
Conferva byssoides, Engl. Bot. 347 ; Dillw. 58. 
Ceramium raolle, Roth Cat. 3, 138. 
Ceramium byssoides, Agardh Disp. 20. 
Hutchinsia byssoides, Agardh Syn. 60. 
Sea -shore; August. 
Main thread obscurely jointed, composed of many pa- 
rallel veins ; twigs in bundles, short, rose-red. 
vol. i. a 
