EXPLANATION To PLATE XXIV. 



1. Aglaopheiiia '-tnt^n-trlii Alliiiaii. Side view nl hvdrotheea- (greatly enlarged). ( Alter Allinan.) 



'2. Aijltioplii'iiia cnnstricta. Front view of liydroflieca (greatly enlarged). (After Allniau.) 



H. Ji/lanplicnia constricla. Front of stem (enlarged*. (After Allman.) 



I. .li/laniilieiiia xiirii/>i</ttn<i Marktanner-Tiirneretseher (enlarged). (After Marktanner-Turneretscher 



.">. Aglaoplienia bicornulu Nutting. Part of byilrocladiiun (enlarged). 



6. Aglaophenia hiconnila. C^nartering view of hydrothee.a' (enlarged). 



7. .liilnnpheniii liiconiiila. Front view of hydmtliecie (enlarged). 



8. Ar/laophenia bicornnla. Hydrotlieea (greatly enlarged). 



!i. A</l<ii>i>hrni<i riilniHiut Allman. Part of bydroeladinin (enlarged). (After Allman.) 

 Id. Aylaoplienia calamus. Front view of hydrotln-ea- (enlarged). (After Allman.) 

 11. Aglaoplif nia calamus Corbula (enlarged). (After Allniau. ) 

 1-. necocar/ius myriophulliim (Linnaeus). Part of hydrncladinni i enlarged). 



13. Tlii j ii'<iri>i< muriiijiliylliim. Ilydrotlieea (greatly enlarged). 



14. Tliecocarpits distans i Allman i. Part of liydrocladinni (greatly enlarged). (After Allman.) 

 lf>. Thecocarp u 8 distant , (.'orlmla (enlarged). (After Allman. I 



Iti. Thecocwpus distant. Corlnila leaf (enlarged). (After Allman.) 

 23fi 



