Tin: MAKINH ALCJ/K OF NEW ENGLAND. 151 



carps oxtcnial, sessile or peilieellale, with a distinct carpostouie, sj)ores 

 in several in:vsses coinposed of closely packed radiatiiij^ filaments horno 

 on a basal placenta. 



A boaiitiful j;oiins. coinprisin^^ahout twcnt.v-fivo species, the most striking of which 

 are found in Australia. Nrw Zeahmd, and at tlie Cape of CJood Hope. 1*. coccineum is 

 very witiely tlilfused in the North Atlantic and Pacilie, and jiossibiy also in tin* south- 

 ern hemisphere; hut it has only been observed once on the coast of New Kn;;land, 

 and that perhaps re(|uires veriiieat ion. The «;<nus is at once recognized by the braneh- 

 in«;. The fron<l is linear and distichously pinnated, the pinnules, which are always 

 alteniately secund in groups of from two to live, being of two kinds; the lowest 

 pinna is short, simple, and acute, while the remaining pinnie are pinnulate or pecti- 

 nato-decompound. The cystocarps of Phvamium are similar to those of JUiodifmniia, 

 and the zonate tetraspores are in special brauchlets or lealhts. known as stichidia. 



r. cocriNEUM, Lyngb.; Pliyc. Brit., Tl. 44. 



Fronds narrowly linear, withont a niidril), decompound pinnate, pinniC 

 idternately secund in threes or tours, the lowest snbidate and entire, the 

 upi»er pectinate on the upper side; conceptacles marginal, solitary, ses- 

 sile; tetrasjKires zonate on divaricately branching processes borne on 

 the inner side of the pectinated branchlets. 



Boston r>ay, Miss Haiclshurst. 



The above-named locality, given in the Xcreis, is the only one known on the New En- 

 gland coast, for this witlely <litiused species, if we except the vague statement of Hailey 

 in the American Journal of Science, Vol, III, 1847, p. 84, that it has been found by Kev 

 J. L. Kussell on the coast of Massachusetts. One sometimes finds forms of Euthora 

 orintata labelled P. coccineum in American herbaria. The common Californian form of 

 the species is coarser than the European, and has been named by Kiitzing P. Calif or- 

 ni( uin. It is not, however, distinct. 



CORDYLECLADIA, J. Ag. 



(From Kop6v?.Tjy a club, and K/.adnr^ a branch.) 



Fronds tilitbrni, irregidarly branched, carnoso-cartilaginous, formed 

 of two strata of cells; medullary layer of oblong, longitudinal cells, 

 cortical of roundish, colored, subseriated, vertical, minute cells; con- 

 ceptacles sessile on the branches, subspherical, furnished with a cellular 

 ])ericarp at length perforate, containing a densely' packed globular mass 

 of roundish angidar spores, formed bj' the evolution of much luanched 

 lilaments issuing from a basal jjlacenta ; tetrasjiores innncrscd in the 

 periphery of pod-like ramuli, oblong, cruciately parted. 



? C. HuxTii, Ilarv. 



"Fronds densely tufted, springing from a common, expanded, crust- 

 like disk, livid jMirple, tereti-comi»ressed, once or twice forked or se- 

 cundly branched; branches subulate, alternate, acute; fruit?'- (Xer. 

 Am. Bor., Part II, p. 155.) 



Narragansett Bay, J/r. George Hunt. 



