60 NATURAL HISTORY 



75. Navicula gihha. The crooked Navicula. — 1-1 20th 

 to l-144th ; new species. 



76. turgida. — l-120th to 1- 600th ; new 



species. 



77- uncinata. — l-240th ; new species. 



[h.) Distinct individuals connected together in various 



forms. 



Stick or rod-shaped. 



78. Bacillaria elongata. — l-480th ; new species. 



(c.) Distinct individuals connected in bundles not va- 

 rying in form, occasionally broken. 



79. Fragilaria aw^M5fa.~-New species; l-480th to 

 1.576th. 



80. ^ bipunciata. — New species; 1- 1200th. 



81. pectinalis. — 1 -576th. 



82. — scalaris, — New species ; l-576th to 



l-900th. 



{d.) Distinct individuals, without foot-stalks, radially 

 disposed (like a fan). 



83. ExiLARJ A Jlahellu?n — New species; l-960th. 



84. panduriformis. — New species ; l-430th. 



(e,) Fixed sessil. 

 Synedra. — New genus. 



(/.) Animalcules fixed by a pedicle or stalk ; some- 

 times in pairs ; fore part dilated. 



85. Gomphonema discolor, — New species ; J -600th. 



