l6o CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



33. Coilodesme calif ornica {Rufr.) Kjellm. 



Plate XXIX, Figs. 1-3. 



Coilodesme californica (Rupr.) Kjellm. in Engl, and Prantl. Natiirl. Pflanz- 



enfam., Lief. 86, 202, 1893. 

 Adenocystis californica Rupr., Tan^e. Ochol, 29. 



Plant olive-green, hollow, inflated, thin membranaceous or pajiery, cylindri- 

 cal or ovoid, 2-6 dcm. long, Yz~i dcm. wide, abruptly contracted below into a 

 short, solid stalk 1-3 mm. long. Sporangia abundant, scattered over the 

 whole surface of the plant, ovate, 25-30// x 12-15//. 



Abundant on the upper branches of Cystoseira osmtmd- 

 acca. Pacific Grove and San Pedro, California. 



The plants appear in June as minute, smooth, air-tight 

 sacks filled with a gelatinous liquid which is formed from 

 the degeneration of the central tissue. They gradually 

 increase in size, soon becoming wrinkled and folded and 

 finally torn, especially at the ends. The walls are thin and 

 delicate and are composed of two layers of poorly differen- 

 tiated tissue. The single outer row of cells is rounded and 

 though not well developed it is easil}'^ distinguished from the 

 hypodermal layer. The hypodermal layer is composed of 

 two or three layers of irregularly rounded or quadrangular 

 cells; beneath this is the central layer composed of three 

 or four layers of large cylindrical cells surrounded by many 

 smaller ones. The hypodermal layer is supplied with one 

 or two large oval chromatophores, and occasionally one is 

 found in the central layer of tissue. 



34. Halorhipis^, gen. nov. 



Plate XXVIII. 



Plant body solid, leaf-like, arising from a disk-like base, composed of two 

 layers of tissue, the outer layer consisting of 2-3 rows of cuboidal cells, the 

 inner layer of several rows of large, cylindrical cells; reproducing by unilocu- 

 lar sporangia collected in sori which are distributed over the whole surface 

 of the plant ; hairs numerous, forming the center of the sori ; plurilocular 

 sporangia and paraphyses wanting. 



1 a9.9=sea, /j:-cV=^fan. 



