INDEX. 



NAMES IN ITALICS ARE NEW SPECIES. 



\ 1 1 1 I \ i > \ . . . . 1 ">7 



Ai.<, 1 i Ikitm lerifitio of, \i 



< "1'ir of, . xii 



Fresh Water How i" find, 



collecl and preserve, . . xiii 



Significal ion of term, . . xi 



Uses of, xii 



Varieties of, . . . . xii 



.. 

 .. 

 (i 



95 

 95 

 95 



'.i7, 160 



'.'7 

 96 

 96 

 95 

 96 



\ i: i ll Rl IDE8M I S, Ehrb., 



convergent I Ehrb. Ralfe, 

 fragile, 



[ncus i Ehrjb. Ham 

 orbicularis, 

 octocornis, Ehrb., 



<>ntli.<, 



quadridens, Wood, 



1,'niii. 



" Bubulatus, Kg., 



\i if n iK- ^nd Books. Namesof viii 



Bambi bina, Kg. Uharacteristics of 24 



Brebissonii, Kg., . 24 



Var. gracileseens, Nord., 25 



delicatissima, . . . 25 



C\ini vi.imums I >.r\. Descrip- 

 tion of, . . . ~>4 

 Clevei, .... 56 

 connatus I Breb. I Kirch., 55 

 Var. min<r. Nord., 55 

 costaltui, . . . 56 

 Cucurbita (Breb.) Kirch., 54 

 " curtus ' Breb. I Kirch., . ~>4 

 diplospora, Lund., . 56 

 minutus (Halt's). Kirch.. ">4 

 pseudoconnatus, Nord., . 55 

 Ralfsii (Kg.) Kircli., . 54 

 Thwaitesii, Ralfs, . . 56 



