Yendo : CORALLINE VER^E. 715 



normally subcompressed obovate but sometimes globular or 

 linear. The conceptacles are slightly bulged out, two to several, 

 mostly immersed in the shaded side of a cordate articulus. 

 Geniculi lineaeform. 



A branch is often simple with homogeneous cylindrical ar- 

 ticuli. Plants with lots of this sort of branch are likely to be 

 confounded with Amp. cretacea Endl. or the preceding forma. 

 But the occurrence of the cordate articuli is the character upon 

 which to separate the present species. Amp. epiphlegnoides 

 set- ms to me quite similar to this plant. I mention it here as a 

 synonym, however, with doubt, as I have not seen any authentic 

 specimen of Agardh's plant. 



Common : 25 ft. below low water mark, not seldom found, 

 several fathoms deep. 



3. Cheilosporum californicum (Dene.). PL LIV., Fig. 2 ; PI. 

 LVI., Fig. 3. 



Frond 3-5 cm. alta, stipitata, irregulariter di-trichotome ra- 

 mosa : articulis stipitis cylindraceis diametro sesqui- 2- plo 

 lorigioribus sursum latioribus et compressis ; ramorum approxi- 

 matis, adpressis mediis costatis, obreniformibus vel sagittatis 

 lobis rotundis, longitudine inter genicula distantiam loborum 

 4-plo brevioribus ; apicalium obovatis compressis : conceptaculis 

 hemisphericalibus binis vel quatuor in utraque facie articuli 

 instructis. 



Amphiroa californica Dene., Class f. d. Alg. et Cov., p. 112. 

 Kiitz : Spec. Alg., p. 704. 

 Aresch : in J. Ag. Spec. Alg., II., p. 542. 

 Harv: Ner. Bor. Americ, p. 86. 



As the original description of this plant was given somewhat 

 briefly, a few other species have been mistakenly identified with 

 it; and Areschoug counted it under the "species inquirendae" 

 (/. c.). We have a specimen of Amp. californica Dene., col- 

 lected at Oregon and determined by Dr. Farlow. Our plant is 

 exactly similar to this specimen and at once accords very well 

 with Decaisne's description. 



Not rare : low-water mark, also in tide pools. 



4. Cheilosporum frondescens (Post, et Rupr.), f. typica. PI. 

 LIL, Fig. i ; PI. LVI., Figs. 4, 5 and 8. 



C or allina frondescens Post, et Rupr., 111. p. 20, t. XL., f. 103. 



