PI. cell. aph. 2.THALASSIOPHYTiE. S8.Verteb. 339 
Tufts stiff, close, blackish brown, >2 or 3 inches high, not 
adhering to paper; joints composed of an internal annular 
series of interrupted cells. 
C. CoiiALLiDEiE. Thallus threadshape, jointed; axis 
membranaceous, fibrous, continuous ; lark cellular, creta- 
ceous, jointed; thecce terminal or lateral. — Marine. 
XIV. 39. JANIA. Lamarck. Jania . 
Thallus threadlike, hairlike, forked, jointed ; joints cy- 
lindrical ; axis horny ; bark thin, chalky. 
1. Jania rubens. Reddish jania. 
Joints of the stem roundish, of the forks clubbed ; thecce. 
polymorphous, appendiculated, or naked. 
Jania rubra, Lamouroux Zooph. 212. 
Sea- shores. 
/3. communis. Branches long ; thecce 0. 
Corallina rubra, Ellis Corail. 64. 
S'. cristata. Thecce appendiculated; appendix truncated. 
Corallina cristata, Ellis Corail. 65. 
<■. spermatophoros. Thecce very numerous, broad ; ap- 
pendix long, bristlelike. 
Corallina spermatophoros, Ellis Corall. 66. 
2. Jania corniculata. Horned jania. 
Joints of the stem and branches roundish, rather com- 
pressed in the upper part, 2-horned. 
Corallina corniculata, Ellis Zooph. 121 ; Corall. 65. 
Sea-shore, and on marine plants. 
Appendices or horns at the top of the joints vary much 
in length, and are sometimes jointed. 
XV. 40. CORALLINA. Pliny. Coralline. 
Thallus threadlike, jointed; branches three-forked; axis 
fibrous, horny ; bark chalklike, thick, cellular. 
1 . Corallina officinalis. Shop coralline. 
Three-forked , greenish; branches pinnate; pinnules two- 
rowed ; joints of the stem rather compressed, wedgeshaped* 
©f the twigs cylindrical ; thecce terminal, capitate. 
z 2 
