Explicatio figurarum. 
Figurae in originalibus delineata erant: Sub Zeiss. Oc. 2, obj. A — figurae 3, 
6 C, 11, 12, 16 D, 17, 18, 19, 22, 23, 24, 95, 29, 34, 35, 36, 38, 39, 41, 42, 43, 
44, 45, 46, 47, 49, 50, 52, 53, 54, 56, 57, 59, 60, 61, 62, 63, 64, 65 et 66; Sub 
Zeiss. oc. 4 obj. a*—figurae 21, 32, 33, 37, 40, 48, 51, 55. 58. Sub. Zeiss. oc. 2 
obj. C- figurae 1, 2, 4, 5, 6 A et В, 7, 8, 9, 10, 16 A et C, 26, 27 et 28. 
In omnibuo figuris litterrae abreviationesque designant: 
a—stratum externum hydrothecae definitivae. 
av — apicem vegetationis. 
b—stratum internum hydrothecae definitivae. 
cd—cavitatem diaphragmae. 
cv —cavitatem vestibularem, i. e — cavitatem subumbrellarem 
hydromedusoidorum: cv, — hydromedusoidi hydrorhyzae, 
cv, — hydromedusoidorum hydrocaulis, ev,, cvs, cv4,— 
hydromedusoidorum primi, secundi et tertii hydranthi. 
D—-diaphragmam. 
gm—-hydromedusoidum genitalem (gonozoidum). 
Hb—hydrobasin hydrothecae definitivae. 
Hc—hydrocalycem hydrothecae definitivae. 
Hcl — hydrocaulem. 
Hm—hydromanubrium hydromedusoidorum: М, — in hydror- 
hyza, Hm,—in hydrocaule Hm,, Hm; et Нт.— ш hyd- 
ranthis (hydromedusoidi primi, secundi ac tertii). 
Hth—hydrothecam primitivam. 
Hum-—hydrumbrellam hydromedusoidorum: Нит„— hydrorhy- 
zae, Hum,—hydrocaulis, Æum,, Hum, et Hum; — hyd- 
ranthi (hydromedusoidi primi, secundi ac tertii). 
M — hydromedusoidos: M, — hydrorhyzae, M, — hydrocaulis, 
M,, M, et M,—hydranthii. 
O—foramen diaphragmae. 
Op— operculum hydrothecae. 
p— perisarcum. 
psd — pseudodiaphragmam. 
