50 ORDERS. 
_ Examples. ‘Tipula, (crane-fly) culex, (gnat) 
asilus, (hornet-fly) empis, bombilius, musca, 
(house-fly) tabanus, (great horse-fly) conops, cs- 
irus, (gad-fly) hippobosca, (common horse-fly.} 
IX. CLASS MOLLUSCA 
. IS DIVIDED INTO FOUR ORDERS. 
4. Nupata, destitute of a shell. 
Examples. Slug or naked snail, cuttle-fish. 
2. Muxtivatva, having shells with more than 
two valves. 
Examples. Barnacles, acorn-shells. 
8. Bivatyva, having shells with two valves. 
Kxamples. Clams, oysters, scollops. 
4, Univauva, having shells with single valves. 
Examples. Snails, conk-shells. : 
xX. CLASS ECHINODERMA 
IS DIVIDED INTO TWO ORDERS. 
4, PepicELLA, having stem-like organs, which 
are applied by the animals for the purpose of toco- 
motion. : 
Examples. Asterias, (star-tish} echinus, (sea- 
hedgehog) holothuria. 
2. ApoDaA, having no organs for locomotion. 
_ Examples. Siponculus, molpadia, minyas. 
XL CLASS INTESTINA 
IS DIVIDED INTO TWO ORDERS. 
4. Caviroria, having internal cavities and a 
mouth. | 
