WY 
CONTENTS. 
PART I. 
CHAPTER I. 
Gx rae Position oF THE MoLiuscA IN THE ANIMAL Kinepom. 
—-Characters of the five primary groups, or sub-kirgdoms :— 
Vertebrata— Mollusca—Annulosa— Coelenterata— Protozoa. 
MSP RTG ATE NGULLLN gras afk other 91 Soest esos as elle abateyih eke itbedma ames steeens 
CrassEs oF Mottusca.—l. Cephalopoda.—2. Gasteropoda.— 
3. Pteropoda.—4. Brachiopoda.—d. Lamellibranchiata ... 38—7 
Hazirs anp Economy or THE Moutiusca.—Sedentary tribes, their 
mode of attachment ; locomotive tribes, their means of pro- 
gression ; situations frequented by shell-fish.— Food: vege- 
table, infusorial, and animal feeders.—Use of shell-fish to 
other animals for food; use of shells for ornamental and 
other purposes; prices of shells.—Longevity of molluscous | 
animals; tenacity of life; fecundity; oviposition ...... 7—16 
STRUCTURE AND PuystoLocy or THE Mo.iusca.— Nervous 
System; organs of sense.— Muscular system.—Digestive 
system; lingual teeth; secretions.—Circulating system; 
aquiferous canals.—Respiratory system.—The shell, its 
composition and structure; nacreous, fibrous, and porcele 
lanous shells; epidermis; erosion of fresh-water shells.— 
Formation and growth of the shell; adult characters; de- 
collated shells; monstrosities; colours; the operculum ; 
homologies.—Temperature and hybernation.—Reproduction : 
of lost parts; by gemmation; viviparous; alternate; ovipa- 
eM ee Ae EMOLO DIMEN Li ttity ia 2 ge hee Sloe alee sree e eere ato ars. hie 
CLAssIFICATION.—Affinities; analogies; species; genera; families; 
the quinary system; synonyms; authorities; types; abbre- 
UDOT bg Ue eet en a 
15—45 
45—49 
