290 



INDEX. 



pachydermum,Cosmarium, var. typi- 



cum, II 140 



pachyrhynchum, Staurastrum, IV 151 

 Palangula, Calocylindrus, III 108 



- Cosmarium, III 108 



- var. Debaryi, III 106 



- var. genuinum, III 108 



Dysphinctium, III 108 

 Penium, III 108 



palustre, Cosmarium, II 133 



var. ovale, II 133 



pandurans, Penium, I 83 

 papillifera, Helierella, II 91 



Micrasterias, II 91 ; V 266 



- var. glabra, II 93 



- f. major, II 92 



- var. varvicensis, II 93 

 papilliferum, Didymidium (Micras- 

 terias), II 91 



papillosum, Sphserozosma, V 223 



- Spondylosium, V 223 



- Staurastrum, V 41 

 papulosum, Euastrum. II 63 

 paradoxum, Didymidium (Stauras- 

 trum), V 102 



- Phycastrum, V 101, 119 



- (Stenactinium), V 102 



- Staurastrum. I 14 ; V 98, 101, 



108, 119 



- var. ciiigulum, V 105 



- var. evolutum, V 107 



- var. longipes, I 14; V 103, 

 107 



- f. minor, V 106 



- f. minutissima, V 106 



- var. iiodulosum, V 106 



- A^ar. parvum, V 106 



- var. tetracerum, V 119 



- Xanthidiastrum, V 218 

 parvula, Arthrodia, I 133 



- Spirotsenia, I 43 

 Ursinella, III 110 



parvulum, Closteiium. I 133 



- var. angustatum, I 134 



- Cosmarium, III 110 



- var. pumilum, III 49 



Dysphinctium, III 110 



- var. undulatum, Ill 49 

 paxilliferum, Staurastrum, IV 190 

 Pecten, Euastrum, II 12 



Helierella, II 13 

 pectiiiata, Helierella II 60 



Heterocarpella, II 60 



. pectinatum, Cosmarium, II 60 



Didymidium (Euastrum), II 60 

 Euastrum, II 60 



- var. brachylobum, II 62 

 var. inevolutum. II 61 



pectinatum, Euastrum, f. intermedia, 

 II 62 



- f. typica, II 60 



pelagic-urn, Staurastrum, I 13 ; V 124 

 Pelta, Euastrum, II 5 



Penieae, I 26 : 71 

 penioides, Tetmemorus. I 217 

 Penium, I 3, 71 ; V 261 

 peracerosa, Arthrodia. I 154 

 peracerosum, Closterium. I 154 



- var. elegans. I 155 

 perforata, Ursinella, II 143 

 perforatum, Cosmarium, II 143 



- var. typicum, II 143 

 pericymatia, Ursinella, III 34 

 pericymatium, Cosmarium. Ill 34 



- var. eboracense. Ill 34 

 Dysphinctium. Ill 34 



perissum, Cosmocladium, V 200 

 perpusillum, Cosmarium, III 88 

 Pertyanum, Cosmarium, III 144 

 Phaseolus. Cosmarium, II 158 



- var. achondrum. II 177 



- var. bioculatum, II 165 



- var. elevatum, II 159 



- f. minor, II 159 



- var. typicum, II 158 

 Euastrum (Cosmarium). IT 158 

 Heterocarpella. II 158 

 Ursinella, II 158 



phimus, Arthrodesmus, IV 104 



- var. hebridarum, IV 105 



- var. occidentals, IV 104 

 Phycoporphyrin, I 6 

 Phylogenetic relationships. Ill 

 Phymatodocis, I 25, 28 

 phymatosporum, Penium, I 91 

 pictum. Euastrum, II 41 

 Picum, Staurastrum, V 51 

 pileolatum. Staurastrum, IV 125, 



127 



- var. Brasiliense, IV 127, 128 



- var. cristatum. TV 129 

 pilosellum, Staurastrum, IV 187 

 pilosum, Gonatozygon, I 34 



Phycastrum (Amblyactinium), V 



63 

 - Staurastrum, V 61, 63 



- var. Brebissonii, V 62 



- f. minor. V 66 

 pingue, Euastrum, I 14 ; II 30 

 pinguis, Helierella, II 30 

 pinnata, Helierella. II 10 

 pinnatinda, Didymidium (Micras- 

 terias). II 81 



Holocystis, II 81 

 Micrasterias. TI 80 

 var. trigona, II 82 



