244 PROCEEDINGS OF THE AMERICAN ACADEMY 



Harvey states, however, that his name, G. ghhifera, was only intended 

 to apply to what he afterwards called a variety of G. corallina. We 

 have ascertained by examination of the living jDlant, which is common 

 in Long Island Sound, that there is but one species which comprises 

 all the forms described by Harvey under the name of Griffithsia in the 

 Ner. Am. Bor. The so-called var. ghhifera is merely the male plant, 

 of which the terminal cell is enlarged and globose, and has the anthero- 

 zoids borne in the form of a cap on the summit, in which respect it 

 differs from any other species of the genus. The male plant is always 

 shorter and stouter than the female plant. The var. tenuis of Harvey 

 is usually tetrasporic, and the tetraspores are borne in whorls of sev- 

 eral consecutive joints. In another place we shall have more to say on 

 the present species ; and we only need remark, iu this connection, that, 

 under G. Bornetiana, we include all the forms erroneously referred by 

 Harvey in the Ner. Am. Bor. to Griffithsia corallina, and by Agardh 

 in his Epicrisis to G. glohifera^ Harv., which was the name applied by 

 Harvey himself to what is really only the male plant. 



Callithajinion Lejolisea, n. sp. fronde minuta repente ad nodos 

 Amphiroce parasitica ; filis verticalibus superne nudis in parte infe- 

 riore ramulosis ; antheridiis ovalibus ad ramos inferiores terminalibus ; 

 cystocarpiis (favellis) ad ramos inferiores terminalibus ; sphserosporis 

 triangiilatim divisis in ramulis lateralibus terminalibus. This very 

 small species of Callithamnion, which is seldom an eighth of an inch 

 high, was found growing on the joints of an Amphiroa received from 

 San Diego, Cal. It is probably not rare on the coast of California, 

 but from its small size escapes detection. It resembles i:)erfectly, ex- 

 cept in the cystocarps, Lejolisea Mediterranean which grows upon Udotea 

 Jlahellata. In both species the frond is procumbent and attached by 

 disk-like cells, and the erect filaments give off at the base a few lateral 

 branches, upon whose tips the organs of fructification are borne. In 

 both species the antheridia are oval, and the tetraspores tripartite and 

 more or less clustered. In the one case, however, the fruit is a true 

 favella, and the species must be considered a true Callithamnion, while 

 in the other the fruit is more complicated, having a sjiecial covering, 

 and with the spores arranged not in indefinite masses, but around a 

 central placenta. 



Callithamnion Dasyoides J. Ag. {Gall, ptilophora Eaton mscr.). 

 California. 



Callithamnion arbdscula, var. Paeijiciim., Harv., Jour. Proc. 

 Linn. Soc, Vol. VI., No. 24 = G. Pikeanum, Harv., Ner. Am. Bor. 11, 

 p. 230. 



