332 VIEW OF NATURE. 



Second Grand Division. 



CLASS v, Mollusca, bodies soft, without bones, but their 

 muscles attached to a skin which forms a calcareous covering 

 called a shell, and is, in many cases, produced from their skin. 

 These animals possess no organs of sense but those of taste 

 and sight, and these are often wanting ; the nautilus and cut- 

 tie fish are of the highest order of Molluscous animals. 



One order contains animals without heads, having a shell 

 usually of two pieces ; these are called bi'valves ; as the oys- 

 ter, clam, and snail. 



Third Grand Division. 



We proceed next to those animals called Articulated; these 

 have jointed trunks, and mostly jointed limbs. They possess 

 the faculty of locomotion, or changing place ; some have feet, 

 and others are destitute of them ; the latter move by trailing 

 along their bodies. 



CLASS vi, Annelida, contains such animals as have red 

 blood, without a bony skeleton ; bodies soft and long, the cov- 

 ering divided into transverse rings ; they live mostly in water ; 

 some of them secrete calcareous matter which forms a hard 

 covering, or shell ; as the earth or angle worm, and leech. 



CLASS vn, Crustacea, contains animals without blood, with 

 jointed limbs fastened to a calcareous crust ; they breathe by 

 a kind of gills. 



CLASS vni, Archnida, contains spider-like animals without 

 blood, jointed limbs, without horns ; they breathe by little open- 

 ings, which lead to organs resembling lungs, or by little pipes 

 distributed over the whole body ; these do not pass through 

 any important change of state, as insects do ; they have mostly 

 six or eight eyes, and eight feet, and feed chiefly on living ani- 

 mals ; examples of this class are the spider and scorpion. 



CLASS ix, Insecta, or insects, without blood, having jointed 

 limbs and horns ; they breathe by two pipes, running parallel 

 to each other, through the whole body ; they have two horns ; 

 they are mostly winged, having one or two pairs ; a few are 

 without wings ; mostly with six feet. They possess all the 

 senses which belong to any class of animals, except that of 

 hearing. 



The winged insects pass through several changes or 'meta- 

 morphoses. The Butterfly is first an egg; this when hatched 

 is long and cylindrical, and divided into numerous rings, hav- 

 ing many short legs, jaws, and several small eyes ; this is the 



Second grand division, what class does it contain ? What order in this 

 class is mentioned ? Articulated animals Class 6th Class 7th Class 8th 

 Class 9th Metamorphoses of insects. 



