471 ^h\ C. Mereschkowsky on CaUfornian Diatoms. 



LX. — A List of CaUfornian Diatoms. 

 By C. Mereschkowsky. 



[Continued from p. 300.] 



104. NitzscMa angularis, W. Sm. Santa Monica, amongst 

 Macrocystis, not rare. [M.] 



105. NitzscMa "bilobata, AV. Sm. Santa Monica, amongst 

 yacroci/stis, not rave. [^L] 



lOG. Nitzschia circumsuta (Bail.), Grun. San Pedro, marine, 

 rather rare. [M.] 



Lenfrth: 0^2-32 0-3n_ 

 ]5readth : 0^70 0-0tt9' 



107. NitzscMa distans, Greg. San Pedro; Santa Alonica, 

 amongst Macrocystis, not rare ; Northern California, 

 rare. [M.] 



108. NitzscMa fraudulenta, CI. San Pedro, rare. [M.] 



I liave seen only one short chain composed of four indi- 

 viduals united by their ends. Length O'OSo mm. Endo- 

 chrome composed of two plates. 



109. NitzscMa granulata, Grun. San Pedro, rather common. 



[M.] 



110. NitzscMa incolor, Mer. San Pedro, very common. [M.] 

 This species, whicli 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. NitzscMa insigms, var. SmitMi, Kalfs. Santa j^Ionica, 

 amongst Macrocystis ; Northern California, not rare. 

 [M.] 



112. NitzscMa 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. NitzscMa sigma^ var. intercedenSj Grun. Santa Monica, 

 marine, not rare. [M.] 



Length 0*2G2 mm. (Jsually to be found in brackish 

 water. 



