INDEX. 



291 



pinnatifulum, Euastrum, II 80 



Tetrachastrum, If XI 

 pinnatum, Euastrum. II 10 



var. intermedium, II 9 



var. typicum, II 10 

 Placodermoe, I 26, 70 

 Plankton, I 13, 10 



plnnum, Spondylosium, I 10 : Y 222 

 platyisthmum, Cosmarium, 111 127 

 Pleurenterium, I 24: IV 118. 119 

 Pleun.h.-niopsis, 1 24 ; II 126 

 I'l'-urotienium, I 3. 24, 197 

 plicatiim. < 'osmarium, II I 60 

 var. decedcns. 1 1 1 4.'5 



- var. hibernicum, III 61 



- f. major, 1 1 1 60 



- var. minus, 1 1 1 44 

 var. Sroticum, III <>l 



- var. sinuosiini, 1 1 1 44 



Didymidium (Cosmarium), III on 

 Pokornvanum, Cosmarium, II 190 



Euastrum, II inn 

 ])olare, Kuaslnim. I I lint 

 puloiiicum, I'enium, I !(." 

 plygona, Ursinella, III 70 

 polygonum, Cosmariuin, 1 1 1 76 



Kuastrum (Cosmarium), III 70 



- Xanthidium, I V ', \ 

 polymazum, Cosmarium, III 1-ln 

 polymorphum. ( 'lustcrium. I HO 



- ( 'osmarium, I '.)') 

 Didymidium (Staurastrum). Y 



120, 129 

 Penium, I 14, 90 



- t. alpicola, I DO 



- var. Lundellii, I 90, 91 



- Staurastrum, V 125, 12'. 



- var. braehycerum, Y 130 

 var. cyrtocrnim. V 135 



- var. munitum, V 128 



- var. pusillum, V 127 

 var. simplex, V 128 

 var. subgraeile, V 127 



polytriehum, Ph vast rum, V 53 



- Staurastrum, Y 53, 50 



var. alpinum, V 5!> 



- var. readingense, V 54 

 porrecta, Arthrodia, I 1 1 

 porrectum, Closterium, I 116 



- var. angustatum, I 115, 116 

 Portiana, Ursinella, III 105 

 Portianum, Cosmarium, III 165 



- var. nephroideum, III 167 

 var. orthostichum. Ill 105 



Portii, Leptocystinema, I 31 

 praegrande, Cosmaridium, III 150 



- Cosmarium, III 150 



PleurotseniopsiS; III 150 



VOL. V. 



prselonga, Arthrodia, I 104 

 praelongum, Closterium, I 164 



- f. brevior, I 165 

 prsernorsum, Cosmarium, III 196 



var. gallicum, III 197 



- var. germanicum, III 199 

 var. soandinavicum, III 197 



Preservation of Desmids, I 15, 17 

 rringsheimii, Staurastrum, var. 



duplo-major, V 53 

 Pritchardiana, Arthrodia, I 172 

 Pritchardianuni, Closterium, I 172 



- vai-. minus, I 173 

 proboscidium, Staurastrum, V 129 



- var. subglabrum, V 129, 130 

 prominula, Ursinella, IV 46 

 prominulum, Cosmarium, IV 46 



- var. subundulatum. IV 47 

 promoiitorium, Cosmariuni, IV 34 

 proiia. Art Iirodia. 1 !".'> 

 proiium, Closterium, I 173 



- var. acutum, I 177 



- f. brcvius. \" 264 

 var. ( 'ornu, I 157 



- var. Linea. I 179 



- var. Pritehardianum, I 172 



- var. typicum, I 173 

 Protoplasm, 1 ."> 



protractum, ('osmarium, IT 07; III 

 181 



Didymidium (Cosmarium), III 

 182 



Kuastrum (Cosmarium), III 181 

 protuberans, Cosmarium, III 69 



- f. paludosa, III 70 

 pseudamcena, Ursinella, IV 31 

 pseudamoemim, Cosmarium, IV 31 



- var. basillare, I Y 32 

 1 )ysphinctium, IV 31 



pseudarctoides, Cosmarium, V 266 

 pseudarctoum, Cosmarium, III 32 



Dysphinctium, III 33 

 pseudarctous, Calocylindrus, III 33 

 pseudatlanthoideum, Cosmarium, II 



191 

 Pseudbroomei, Cosmarium, IV 22 



- var. eonvexum, IV 23 

 pseudelegans, Euastrum, II 49 



Helierella, II 49 

 Pseudincus, Staurastrum, V 13 

 pseudobiremis, Ursinella, III 77 

 pseudobiremum, Cosmarium, III 77 

 Pseudoclosterium, Closterium, I 106, 



109 



Roya, I 109 

 pseudoconnatum, Cosmaridium, III 



27 

 Cosmarium, III 26 



