Osr.()RN-ANNl-.\l, ADDUKSS. 27 



future Dill-wins 1<» show their rchitioiis to the ('coiioinx of 

 iiatiirc. 



Our strciMiis. |)<>n(ls, ditches and swamps, like those of 

 other States, swarui with tlie minute forms of life whose size 

 renders them iiiuiotieed. hut \v!u>se existence is as full of iu- 

 <-ident as tiiat of liiulnu' forms. I l<now of no at(emi/t as 

 yet to even euuiuerate the connniui forms fomui in the btatc. 

 They are excrywhere ahundaut, and to every possessor of a 

 fairly uood microscope otf'er a most (h-liirlitful tiehl of 

 research. 



Of such a(piatic f<Huisthe (Jfuf^farf^a ha\-e already heeu ineu- 

 tioued. Prof. F. K. L. lieal has coutrilMited notes on the 

 Tardicjrada . Of llijdi-ovln we have, so far as yet known, 

 hut one or two forms though it is |)rohahIe that otliors may 

 occur. Of spono-es a few of the fresh water speeies have 

 l)eeu (h'termined by Mr. Edward Potts, of Philadelphia, from 

 s[)ecimeus sent from Ames and recorded in his Monouraph of 

 fresh water sponges. ^ Of the Protozoa there are iimumerahle 

 f(trms but so far as kuowii except the description of one 

 .species l>y Prof. C. C. Nutting,'' of Iowa City, no attemi)t at 

 a systematic study of them has l)een made. 



The flora of Iowa is to be congratulated on the fact that it 

 has received the attention of some of the most eminent l)ot- 

 anists of the day. Parry, Bessey, Arthur, Ilalsted, Ilolway, 

 McBride and many others have contributed to a knowledge 

 of our native plants. 



The first contribution which has come to my notice is an 

 elaborate list of species by Dr. C C. Parry, published in the 

 IJeport of the (Geological Survey of the Northwest. The list 

 enumerates above eiifht hundred species, a large part of 

 which are credited to Iowa. 



Messrs. Ilaupt and Naucl have listed the tlowei-iug plants 

 of I)aven[)ort."' 



8— Proc. Phil. Acad. Nat. Sci., 1S87, p. 157-279. 



g — Amer. Nat. Vol. XXII., p. i^. 



10 — Proc. Pav. Acad. Nat. Sci., Vol. 1., p. 153-164. 



