214 ENTEROMORPHA. 



6 12 inches in length, filiform, cylindrical, tubular, inflated, rising with a 

 main stem about I line in diameter, on all sides of which, and along the 

 whole length, the branches are inserted : branches 26 inches long, smaller 

 in diameter than the stem, between erect and spreading, set with a second 

 series, 1 or 2 inches long, which, in their turn, bear a third, which are quite 

 capillary. The structure distinctly reticulated, the reticulations roundish, 

 but angular. Fructification : 3 or 4 subglobose granules within many of 

 the reticulations. Substance membranaceous, but firm and somewhat car- 

 tilaginous when dry, adhering very imperfectly to paper. Colour a very 

 pale, yellowish green." Grev. I. c. 



5. E. erecta, Lyngb. ; frond cylindrical, filiform, slender, 

 highly reticulated ; branches erect, opposite or alternate, set 

 with capillary rarnuli, all attenuated to a fine point. Hook. 

 Br. Fl. ii. p. 314; Wyatt, Alg. Danm. No. 166; Harv. 

 Phyc. Brit. t. xliii. E. clathrata, &. Grev. Alg. Brit. p. 

 181. Conferva paradoxa, Dillw. (authentic specimen) ; 

 Griff. MS. 



On rocks in the sea, about half-tide level. Annual. Spring and sum- 

 mer, not uncommon. Frond 4 8 inches high, cylindrical, from the thick- 

 ness of a hog's bristle to half a line in diameter ; stem generally undivided, 

 closely set with opposite or alternate, simple branches, which diminish in 

 length upwards ; these are gradually attenuated to a point, and set through- 

 out with sub-distichous, slender, setaceous, erecto-patent ramuli, 1 or 2 

 lines long, and all tapering at the tips, which give the plant a feathery ap- 

 pearance. Such is the normal state of this species, but there are number- 

 less varieties, which seem to connect it with the following, as that in like 

 manner is connected with E. ramulosa ; and I quite agree with Sir W. J. 

 Hooker, who, in adopting Capt. Carmichael's descriptions, says, that how- 

 ever distinct typical individuals of the three supposed species may appear, 

 still, " that there are intermediate states of these plants which would rather 

 lead me to coincide with Dr. Greville, and to unite them." Few plants are 

 so sportive in size and ramification, and if all the varieties were described 

 the species might easily be multiplied till we should have one for almost 

 every marine pool ! 



6. E. clathrata, Roth ; frond cylindrical, filiform, slender, 

 highly reticulated ; branches spreading, much divided, set 

 with divaricated or recurved ramuli. Grev. Alg. Brit. p. 181 ; 

 Hook. Br. FL ii. p. 315 ; Wyatt, Alg. Danm. No. 34 ? E. 

 clathrata, a. Grev. 1. c. Con/, paradoxa, E. Bot. t. 2328. 



Between tide-marks. Annual. Spring and summer. Not uncommon. 

 Frond 4 12 inches high, cylindrical, from the thickness of a bristle to 

 1 or 2 lines in diameter, generally with an undivided stem set with close 

 branches, which spread in all directions and bear a second, third, or fourth 

 series, till the plant assumes a very bushy appearance ; the ramuli slender, 

 abundantly scattered, either spreading or curved back, occasionally tangled 

 and interwoven, their apices always acute and tapering. Carmichael de- 

 scribes this plant as prostrate, "forming a thin, inextricable fleece," a state 

 evidently approaching the following. 



