FRESH-WATER MOLLUSKS. 85 



climb the stems of water-plants with the greatest 

 ease. 



So, you see, wherever may be your home, or 

 wherever you go for your summer vacation, by 



Figure 39. 



the mountain or the river or the sea, you may 

 expect to find some of these forms of life. As 

 you study their habits and examine their shells, 

 you will better understand what a wonderful place 

 is this old world in which we live. 



BLACKBOARD WORDS. 



hastily (has'ti-ly), azalla (a-zarya), syrlnga (sir-iii'ga), 

 magnificent (mag-nif'i-sent), delicious (de-lish'Qs), ac- 

 quainted ak-quant'ed), perpetual (per-pet'Q'al), monk's- 

 hood (mtinks'hood), Planorbis (plan-or'bis), Llmnsea (lim- 

 ne'a), saxifrage (sax'i-fraj), Unio (u'ni-o). 



