474 Mr. C. Meresehkowsky on Californian Diatoms. 
LX.—A List of Californian Diatoms. 
By C. MrRuscuHKOWSKY. 
[Continued from p, 800. } 
10 
—_ 
. Nitzschia angularis, W. Sm. Santa Monica, amongst 
Macrocystis, not rare. [M.] 
105. Nitzschia bilobata, W. Sm. Santa Monica, amongst 
Macrocystis, not rare. [M.] 
106. Nitzschia circumsuta (Bail.), Grun. San Pedro, marine, 
rather rare. [M.] 
Length: 0°252 0°311 
Breadth : 0°070 0-069" 
107. Nitzschia distans, Greg. San Pedro; Santa Monica, 
amongst Macrocystis, not rare; Northern California, 
rare. [M.] 
108. Nitzschia fraudulenta, Cl. San Pedro, rare. [M.] 
I have seen only one short chain composed of four indi- 
viduals united by their ends. Length 0°035 mm. Endo- 
chrome composed of two plates. 
109. Nitzschia granulata, Grun. San Pedro, rather common. 
[M.] 
110. Nitzschiaincolor, Mer. San Pedro, very cominon. [M.] 
This species, which I have described in my paper on the 
Diatoms of the Black Sea, is remarkable for the complete 
absence of chromatophores, of which there is not the slightest 
trace, the frustules being absolutely colourless. It is also 
very common in the Mediterranean Sea (Villefranche). 
111. Nitzschia insignis, var. Smithii, Ralfs. Santa Monica, 
amongst Mucrocystis; Northern California, not rare. 
[M.] 
112. Nitzschia obtusa, var. scalpelliformis, Grun. San 
Pedro, not common. [M.] 
113. Nitzschia palea, var. subtilis, Grun. San Pedro, rather 
rare. [/M.| 
114. Nitzschia paradoxa (Gmel.), Grun. San Pedro, common. 
[M.] 
115. Nitzschia sigma, var.intercedens, Grun. Santa Monica, 
marine, not rare. [M.] 
Length 0°262 mm. Usually to be found in brackish 
water. 
