\!.'. ILS. 



Enen duloua u t" the poasibilit) 



especially with animal) and at another with ( 



reproductive b b show that their motion is produo 



exactly in the same way as in certain animals. Hut i: : !t i„ 



Imagine the transformation of one real Bpeciea Into another. 



assume a vast variety of forms according t" varying circum 



instructive to observe these changes ; but that th<- same 8] Jd undei 



oircumstana a I"- capable "t producing beings of an almost entirely different n 



each capable of reproducing it> Bpecies, i-> a matter which ought not I 



generally without the strictest proof." 



what wise purpose the Creator has till. • 1 the sea and the riv< rs with coui 

 myriads of such plant-, so that the Flora "f the deep waters is as • i I tat >•( 



dry land, «<■ can only conjecture ; the uses !■> which they are applied l._. ma 

 doubtless, of but Beoondar} consideration : and yet the) are of no little imp 

 tin- manufactures and domestic economy of the human race. One <>: th< 

 bets connected with them is their property of growing occasionally upon living 

 animals which they destroy ; this is the case with Achlya proliferate l- hei 

 notice I. 



Their history and classification have occupied the attention of some "I" the i 

 acute botanists of the present day. Bishop Agardh and hie son, Greville, Harvey, 

 D ue, and Klitzing, deserve to 1»- especially named a- most excellent a 



tigators of a very obscure and difficult Bubject. It is those onlj who have made 

 the subject their peculiar study who can determine which of the classifications pro] 

 by these authors has tin- strongest claim on att< ntion. 1, at least, am unable ti 

 ami tli' •■ fore I have preferred t" employ the arrangement made use ol bj Endlicher 

 in his last Supplement, as that which is m..~t likelj to be permanently employ) 

 some years to come. Those who wish to acquaint themselves with t) Y the 



great Algologists of the day should consult the younger Agardh's A 



12) j Greville's Alga 1 ; Harvey's '■' 



Alga (1H41) ; Decaisne's papers in the Annal - ' , 2 Series, 



vol. \\ii. (18-T2) ; Kiit/ii _ - /' . . / 



ttmkundt der . :i ni"st elaborate work, illustrated with eighty 



plates ; the A' n Bacillarim oder Du by the same author, with three 



. 1844, which we regret to saj we know only byname; the you; rdh's 



Adversaria in Systemata Algarwn hodiema, 1844, and various papei . 



N \ ii rax Orders op Alg u s. 



'~ll Di 

 J 



1 ■ llnr 



,/./<- rah d fa or at the < . . . J 



Cellular or tubular v \ bodies^ mutiiplu 



J 



Cellular or tu>- .41 



/' . Multipl, I 1 . .. 



nucules, JUled with starch j 



* # * For the information of those who may wish ti> know something of tl • si 

 og, which I do not adopt, the following li>t is extracted from bis 

 which the reader is referred for an explanation of the peculiar views ■ 



• I. CLASS. ISOC \i;r: 



Tribus l.—Gymnot « rum . Gompl 



moprium. 

 Orj>«b I.— EREMOSPERMEjB. VI. Palmkli 



**i 

 LCrtptooo cxx. -Crypl ■ ccua, Olrtaa, Sphas- ' 



tDtiltU 



II. hmtroMmx.— Hygrocroda, - I p- V1K '.' 



toraitua, Mycc i .. N 



matococcoa, Chionypbe. 



III. pAPftOLBONiaJE. Sa] M ilium. 

 I \ . Pa i qnbmr > .-- - ma. 





\ ■ 



i i i 

 D«SMn>iK.ii. - Cloaterium, '• 



Btetiaa, I'ua-trum, Xauthulumi. Maura-- VIII. ' - 



tram, Cradgenia, lleriamopcedia, - 

 rthra, Hiaastei 



