Mr. C. Mereschkowsky on Californian Diatoms. 299 
81. Amphiprora paludosa, var. hyalina, Eul. San Pedro, not 
rare. [M.] 
Endochrome composed of one plate with margins indented. 
Length 0033 mm. 
82. Tropidoneis elegans (W. Sm.), Cl. San Pedro, not very 
common. [M.| 
Endochrome composed of two plates. 
83. Tropidoneis vitrea (W. Sm.), Cl. [C.] 
84. Campyloneis Grevillei,(W. Sm.), Grun., var. typica. San 
Pedro, rare ; Monterey, 1 rare. [M.] 
85. Campyloneis Grevillei, var. regalis, Grev. Calif. guano; 
San Pedro, rare. [C., M.] 
86. Cocconeis costata, Greg. Northern California, common. 
[M.] 
87. Cocconeis costata, var. hexagona, Grun. San Pedro; 
Monterey, rare, marine. [M.] 
Length 0-016-0:0205 mm., breadth 0:008-0-0115 mm.; 
axial area narrow, lanceolate. 
88. Cocconeis costata, var. pacifica, Grun. Southern Cali- 
fornia (Haliotus washings), very common; Monterey, 
very common. [M.] 
89. Cocconeis dirupta, var. typica, Cl. [C.] 
90. Cocconeis heteroidea, var. sigmoidea, Grun. Santa Monica, 
on Macrocystis, not very rare. [M.] 
91. Cocconeis pellucida, Hantzsch. Northern California, rare. 
[M.] 
92. Cocconeis placentula, Khr. [C., M.] 
93. Cocconeis placentula, var. lineata, Khr. {M.] 
94. Cocconeis pseudomarginata, Greg. San Pedro; Mon- 
terey, not common. [M.| 
95. Cocconeis scutellum, Khr. Rare. [C., M.] 
96. Cocconeis scutellum, var. adjuncta, A. S.* Northern 
California, rather rare. [M.] 
97. Cocconeis scutellum, var. californica, Grun. [C.] 
98. Cocconeis scutellum, var. ornata, Grun. Northern Cali- 
fornia; Monterey, rare. [M.| 
Length : 0:042 0:047 0-053 
Breadth : 0-028 0:031 0:035° 
Four rows of puncta in 0°01 mm.; puncta very large, 
quadrangular, 
* TH, Peragallo, ‘ Diatomées marines de France,’ plate iy, fig. 2, 
