In certain case- reference- will be given. t descriptions of the-e 

 processes. 



c. Tile di-charge nf the unused parts nf the fund I defaccati' n i . 

 < >h-erve and de-cribe it" pn-<ible. In snme cases there i- a definite 

 opening for this purpn.-e. in nther eases not. 



d. Absorption, assimilation and dissimilation. These are u-ually 

 m t observable. 



e. 1 )i-trilmtinn of fn, >d \\-ithin the hndy. There is usually -nine 

 method . f carrying the fond almut within the Imdy : -nmetinic- a 

 definite -et nf nrgaiis fnr this purpose ( circulatnry sv-tem of higher 

 animal- i . 



f. Respiration, the taking nf oxygen and giving ; ft" of O >_.. The 

 processes involved are usually movements produced in the -urnmnd- 

 ing atnn>s]ihere or water, tn hring ( )._.aiid carry away O L.and inter- 

 nal current- or ninvement- { -ame as mentiniied in last paragraph). 

 Study both carefully. ( >fteii special organs are pre-ent. respiratory 

 nrgan- (gill-, lungs, tracheae, etc.). Draw and ile-crihe. 



g. Kxcretion, the discharge nf the wa-te products of dissimi- 

 lation (distinguish clearly from defaecatinn i. Study the nrgan- in- 

 \nlved and how they act; make drawings. Study al-n the pmce--e- 

 invnlved. Xntice that often currents are produced, fnr carrying of! 

 the wa-te materials (as in f ). 



It will not he possible, to study all these pn>ce--e- in each organism 

 we take up. Some are lacking in various organisms, and other- arc 

 unfavorable for study. In each case suggestions will he made, or 

 <|Ue-tion> a-kul, indicating the points to he studied. 



A. I ' \K \M El i I'M. 



Study 1'aramecium tir-t, a- a type showing how nm-t of the-e 

 prnce--es are carried on in a -imple way. 



In man\- ca-es in the -tndy of Paramecium, the animals mav he 

 ninunted to advantage in gum tragacanth, which makes their move- 

 ment- -ln\\rr. 



247. a. The tnkiiK/ of fund. I'.y tin- use of india ink ohserve 

 hnw Paramecium hring- fund tn it- nioutli. Sketch a ijuiet indi- 

 vidual. -ho\\ ing the current-, in relation to tlu- nmuth and oral 

 groove. < Jh-scrve the pa--age of the ]artick'- intn the nmnth. and 

 the formatinii () f tlii' f 1 \-aciinle-. 



h. Distribution <>f i,nl. ( )h-erve the circulatinn nf the fond 

 vacuolc-. Dd the vacuolc- alone mo\e. or does tin- internal proto- 

 |ila-m mn\r with them? I*'ollow the circulation of the vacuolr-. 



7-1 



