240 PROCEEDINGS OF THE AMERICAN ACADEMY 



P. Duhji occurs there. "We have also found sterile specimens of a 

 Peyssonnelia at Eastport, Me., which is pi'obal}ly referable to P. Duhyi. 

 P. imbricata, K.tg., in the absence of fruit, will remain a doubtful 

 species. 



Cruoria purpurea, Crn. San Diego, Cal., Mr. Cleveland. 



Cruoriella armorica, Crn. San Diego, Cal., Mr. Cleveland. 



Galaxaura (Microthoe) lapidescens Lam. Key West, Mr. 

 F. W. Hooper. 



Galaxaura rugosa, Kiitz. Key West, Mr. F. TV. Hooper. 



Liagora farionicolor, and L. Cayohuesonica Melville, Jour, of 

 Bot., Sept., 1875, do not seem to be admitted as species by Agardh 

 in his Epicrisis. 



Nemalion? Andersgnii, n. sp. frondibus congregatis lubrico-car- 

 tilagineis simplicibus vel sparse furcatis ; raniis primura subcompressis 

 solidis demum cavis cylindraceis ad 6-8 pollicares altitudine, plerumque 

 subjequalil)us ramulis dense cinctis ; ramulis simplicibus vel furcatis ; 

 antherozoideis ad cellulas externas fasciculatis ; cystocarpiis ? — Santa 

 Cruz, Cal., Dr. C. L. Anderson. — This species, first found by Dr. An- 

 derson, is variable in appearance. AYhen young, the fronds are solid, 

 and consist of an undivided axis, from which ai'e given off short lateral 

 branches in all directions. When older, the main axis forks once or 

 twice, as do also the ramuli ; and, still later, the main axis becomes 

 swollen and hollow, and not unfrequently perforated. The substance 

 is always lubricous and cartilaginous, and the color is a blackish-purjile. 

 The frond is composed of closely interwoven longitudinal filaments, 

 from which are given off at right angles dichotomous moniliform fila- 

 ments. We liave never found the cj^stocarps or tetraspores of this 

 species, and consequently there must remain some doubt with regard to 

 the genus. Antherozoids are abundant, and nearly cover the surface 

 of some specimens. As we have not been able to find traces of cysto- 

 carps, it is probable that the present species is dioecious, and, in ihat 

 respect, different fi-om other sjiecies of Nemalion. In aspect it not 

 unfrequently resembles a coarse Ghordaria, and in its later stages bears 

 a certain resemblance to some forms of Halosaccion rameMaceum. As 

 ordinarily seen, it is easily recognized by the rather thick main axis, 

 closely beset with short ramuli of nearly equal length. The ramuli are 

 often distorted by the parasite Strehlonema fasciculatnm Thuret. Np- 

 malion virens, Ag.. of the Pacific coast of Mexico, might be expected 

 to occur in California. The description of that species, however, does 

 not at all apply to the plant found by Dr. Anderson. 



Plocamium violaceum, n. sp. froude anguste liiieari ad 5-6 pol- 



