242 PROCEEDINGS OP THE AMERICAN ACADEMY 



J. Ag. ; but having sent a specimen to Prof. Agardh, he has decided 

 that it is not the species prevously sent him from Vancouver's Island. 

 The fronds are fixed by a disk, from which they rise, or more probably 

 expand out horizontally, for five or six inches. As most commonly 

 seen, they resemble a species of Opuntia with fan-shaped or obovate 

 joints, which are usually fringed with small leaflets on the margin. 

 All tlie lower parts are distinctly costate. The color is a deep I'ed, 

 which becomes very dark. The cystocarps are densely scattered in 

 the central part of the upper portion of the frond. In none of the 

 specimens which we have received is the fruit ripe ; but, using the 

 common exjiression adopted in this order, there is a compound nucleus, 

 not a simple one, as found in Prionitis^ Schizymenia, and other allied 

 genera. 



Phyllophora Clevelandii Farlow. Tetraspores in oval shaped 

 nemathecia in the upper part of frond. 



Gymnogongrus leptophyllus, Ag. California, Dr. Anderson. 

 Under this name Prof. Agardh distinguishes the species commonly 

 distributed as Gymnogongrus Griffithsice of our west coast, in which 

 the cystocarps are immersed, or nearly so. There is still another 

 Gymnogongrus, not uncommon in California, in which the cystocarps 

 project hemispherically on one side of the frond, and which, with little 

 doubt, is G. tenuis, Ag. G. linearis Ag. was accidentally omitted from 

 the list in Proc. Am. Acad., 1875. 



Chondrus canaliculatus Ag. California in several places. It 

 is doubtful whether G. qfftnis Harv. is really distinct from this 

 species. 



Cryptonemia obovata J. Ag. Santa Cruz, Cal., Dr. Anderson. 



Crytonemia dichotoma J. Ag. A single specimen of what seems 

 to be this species was collected by Mr. D. Cleveland at San Diego. 



Prionitis Andersoniana, Eaton mscr. Santa Cruz, Dr. An- 

 derson. 



Prionitis ? Clevelandii, n. sp. fronde coriacea substipitata repe- 

 tite flabellatim prolifera inferiori parte subcostata demura irregulariter 

 perforata ; prolificationibus a disco aut intra margiuem exeuntibus ; 

 cystoearpiis — ? — San Diego, Mr. D. Cleveland. — Of this striking 

 species we have seen but a single steiile specimen, from which it is of 

 course impossible to determine the genus with certainty. We at first 

 supposed it to be the same as the plant to which we have given the 

 name of Kalbjmenia Galifornica. The resemblance, however, is only 

 external, for the structure of the frond is exactly that of Prionitis. If 

 the fruit of the present species should show that it really belongs to 



