### animal | mollusc | gastropod | snail:

Land snail
* All land snail have calcium carbonate crystals in their egg shells
  - snails are hermaphrodites, producing both spermatozoa and ova
* Many land snails can lift ten times their own weight up a vertical surface
  - mate regularly as long as their living conditions are adequate for survival
* Most land snails bear one or two pairs of tentacles on their heads.
* Most land snails eat plants and other vegetation
* Most land snails feed on decay matter
  - plant matter
* Most land snails have chambers
  - characteristics
  - holes
  - interesting projections on the fronts of their heads
  - several characteristics
* Most land snails have shells that are drab in colour and inconspicuous
  - are right-handed in their coiling
  - thin shells
  - two pairs of tentacles, whereas aquatic snails generally have just one pair
  - lack gills and breathe with a lung derived from the mantle cavity
  - occupy the surface litter and upper soil zone
* Some land snails excrete acid
  - feed on bark
* Some land snails have fronts
  - rely on diets
  - spend almost their whole lives in trees
* are a neglected faunal group
  - calciphiles, thriving in limestone environments
  - hermaphroditic, that is, each snail has both male and female parts
  - marginally, but very successfully, terrestrial
  - nocturnal animals and move to food and partners in the late evening or at night
* are quite habitat specific
  - hardy and can survive for many days with little food or water
* avoid desiccation in several ways.
* consume rot vegetation
  - vegetables and fruits, such as lettuce, carrots, cucumber and apples
* engage in various types of courting rituals to attract mates.
  - many different kinds of coloured shells
* live on damp habitats
* require minimal care.
* use an internal mantle as a lung
  - the mantle cavity as a rudimentary lung
+ Snail, Food: Gastropods

Marine snail
* Most marine snails encapsulate their offspring in a resilient biological elastomer.
* Some marine snails eat meat
  - feed on algas
  - produce secretion

Parasitic snail
* Most parasitic snails belong to genus.
* Some parasitic snails live in rivers.

Pond snail
* Some pond snails have gills to breathe in water
  - teeth
* are one of the most frequently-encountered unwanted snails
  - usually tan or dark brown in color
  - very commmon in North America, and especially in Michigan
  - viviparous and the young are born with shells and start out independently at once
* can attach themselves to the feet of ducks and live for many hours
  - live to be at least a year old

Snail mail
* is computer slang for regular postal carrier mail
  - slang for postal mail
  - the term used to indicate letters sent via regular ground or air postal routes
* public service, subsidized by public funds.
* takes days or longer to travel from place to place.

Terrestrial snail
* Most terrestrial snails develop ability
  - excrete urea
* Most terrestrial snails have gas exchange structures
* Some terrestrial snails have lungs
  - live in habitats
* live in in Africa, Asia, Australia, Europe, North America and South America.

Winkle
* are herbivorous and graze on algae on rocks.
* includes brains
  - carapaces
  - cell membranes
  - cells
  - corpi
  - cytoplasm
  - ears
  - faces
  - nuclei
  - plasma membranes
  - sections
  - shellfishes
  - skulls
  - vacuoles
* is an univalve

Marine molluscs
* Many marine molluscs are slow growing and have very limited reproductive success.
* Some marine molluscs have tentacles.