1 68 Roosevelt Wild Life Bulletin 



Plate II. Plankton Algae of Palisades Park 



(All figures x 680) page 



Pig. I Crucigenia rectangularis 142 



Fig. 2 Crucigenia irregularis 142 



Figs. 3-4 Crucigenia apiculata 142 



Fig. 5 Crucigenia quadrata 142 



Fig. 6 Scenedesmus ohliquus 142 



Fig. 7 Scenedesmus arcuatus 142 



Fig. 8 Scenedesmus arcuatus var. platydisca 142 



Figs. 9-10 Scenedesmus armatus 1 42 



Figs. 1 1-12 Scenedesmus brasiliensis 142 



Fig. 13 Scenedesmus longus var. Naegelii 142 



Fig. 14 Scenedesmus abundans 142 



Fig. 15 Scenedesmus quadricauda 142 



Fig. 16 Scenedesmus quadricauda var. longispina 142 



Fig. 1 7 Scenedesmus quadricauda var. qtiadrispina 142 



Fig. 18 Characium stipitatum 143 



Fig. 19 Characium curvatum 143 



