CALIFORNIA ACADEMY OF SCIENCES. 435 



63. Staurastrum cyrtocerum, Breb. 



64. Staurastrum dejectum, Breb. 

 6d. Staurastrum Dickiei, Kalfs. 

 Q6. Staurastrum echinatum, Breb. 



67. Staurastrum eustephanum, Ralfs. 



68. Staurastrum furcigerum, Breb. 



69. Stuarastrum fusiforme, Wolle. 



70. Staurastrum g-racile, Kalfs. 



71. Staurastrum hirsutum (Elirb.), Breb. 



72. Staurastrum inconspicuum, Nord. 



73. Staurastrum leptocladum, Nord. 



74. Staurastrum margaritaceum, Ehrb. 



75. Staurastrum muticum, Breb. 



76. Staurastrum paradoxum, Mejen. 



77. Staurastrum scabrum, Breb. 



78. Staurastrum Sebaldi, Reinscli. 



79. Staurastrum subteliferum. 



80. Staurastrum tricorne, Breb. 



81. Staurastrum trifidum, Nord. 



82. Staurastrum xiphidiophorum, Wolle. 



Most of these are more or less familiar forms, but Cos- 



