INDEX 



Roman numerals refer to plates, arable numbers immediately following refer to figures in plates, and 

 roman capital letters refer to illustrations in the body of the text. Page numbers are in boldface t^fpe. 



acadiana (Mougeotia), 100 

 acanthophora (Spirog^ra), XXXVIII, 



16-17; 216 

 ackleyana (Debarya), XII, 20-21; 77 

 adnata (Mougeotia), XIII, 15-17; 91 

 adpectinatum (Zygncma), III, 4; 25 

 aequinoctialis (Spirogyra), XXVIII, 



10; 178 

 affinis (Spirogyra), 157 

 africana (Mougeotia), XIV, 11-12; 93 

 africana (Spirogyra), 185 

 americana (Mougeotia), XVIII, 1-3; 105 

 americana (Zygnemopsis), VIII, 18-21: 53 

 amplectens (Spirogyra), XXXVI, 8-9; 207 

 angolensis (Mougeotia), XVI, 16; 100 

 angolensis (Spirogyra), 170 

 angusta (Mougeotia), XIII, i; 89 

 anomala (Spirogyra), 186 

 aphanosculpta (Spirogyra), XXV, 8; 166 

 aplanospora (Spirogyra), XXIII, 17-18; 161 

 areolata (Mougeotia), XV, 9-1 1; 96 

 areolata (Spirogyra), XXXVIII, 2; 213 

 areolatum (Zygnema), III, 5; 25 

 arta (Spirogyra), XXXVII, 8; 210 

 articulata (Spirogyra), XXXVII, 10; 212 

 asiatica (Spirogyra), XXIV, 6; 163 

 aspera (Mougeotia), 111 

 atasiana (Spirogyra), 222 

 atrocoeruleum (Zygnema), 38 

 atubulosa (Mougeotia), XVII, 13-14; 103 

 australensis (Spirogyra), XLI, 12; 167 

 austriaca (Mougeotia), XIX, 11-12; 110 

 azurcum (Zygnema), VI, 15; 39 

 azygospora (Spirogyra), XLI, 16; 193 



baileyi (Spirogyra), XXVIII, 7; 177 

 bellis (Spirog>Ta), XXXI, 17-18; 191 

 bicalpytrata (Spirogyra), XXII, 2; 154 

 bichromatophora (Spirogyra), XXVIII, 



6; 177 

 biformis (Spirogyra), XXVI, 9-10; 169 

 bohemicum (Zygnema), VI, 3; 36 

 boodlei (Mougeotia), XVIII, 23-25; 108 

 borgeana (Spirogyra), XXII, 8; XXIII, 



16; 155 

 borinquinae (Pleurodiscus), XII, 12-15; 71 

 borysthenica (Spirogvra), XXXIX, 



1-3; 217 

 borzae (Zygnema), VII, 4; 42 



braziliensis (Spirogyra), 182 

 brunnea (Spirogyra), XXX, 1-2; 184 

 buchetii (Spirogyra), 177 

 bullata (Spirogyra), XXII, 13; 156 



caelestis (Mougeotia), XV, i; 95 

 caimani (Mougeotia), XVII, 18; 105 

 calcarea (Mougeotia), XIII, 10-12; 90 

 calcarea (Spirogyra), 156 

 calospora (Mougeotiopsis), XII, 16-17; 74 

 calosporum (Zygnema), V, 4; 33 

 capense (Zygogonium), XI, 9-1 1; 67 

 capucina (Mougeotia), XVIII, 26-31; 107 

 carinatum (Zygnema), IV, 11; 30 

 carinthiacum (Zygncma), VI, 16; 39 

 carterae (Zygnema), 23 

 castanacea (Spirogyra), 181 

 catenaeformis (Spirogyra), XXII, 12; 



XXIV, 16; 157 

 catenatum (Zygnema), 40 

 ceylanicum (Sirogonium), 234 

 chalybeospermum (Zygnema), VI, 8; 38 

 chekiangensis (Spirogyra), XXXIX, 



13; 220 

 chenii (Spirogyra), XXXIII, 14; 198 

 cherokeana (Mougeotia), XVII, 23; 105 

 chlamydata (Mougeotia), XIII, 19; 113 

 chungii (Zygnema), II, 12; 24 

 chungkingensis (Spirogyra), XXIX, 



1-2; 180 

 chuniae (Spirogyra), XXXVI, i; 206 

 circumcarinatum (Zygnema), IV, 8-9; 30 

 circumlincata (Spirogyra), XXII, 3; 154 

 cleveana (Spirogyra), XXXVIII, i; 213 

 coeruleum (Zygnema), IV, 3-4; 28 

 colligata (Spirogyra), XXXI, 11-13; 190 

 collinsianum (Zygnema), VI, 11-13; 38 

 collinsii (Spirogyra), XXXIII, 12-13; '98 

 Columbiana (Spirogyra), XXVI, 15; 170 

 Columbiana (Zygnemopsis), VIII, 



15-17; 53 

 communis (Spirogyra), XXI, i; 150 

 condensata (Spirogyra), XXI, 11; 152 

 conspicua (Spirogyra), 201 

 conspicuum (Zygnema), II, 8; 23 

 corniculata (Mougeotia), XVIII, 4-5; 105 

 corrugata (Spirogyra), XXXIV, lo-ii; 201 

 costata (Debarya), XII, 22-23; 76 

 cotopaxicnsis (Mougeotia), XIII, 20; 114 



239 



