The original breathing organ of snails is the comb gill (Ctenidium). As this type of gill is only able to acquire oxygen from water, all terrestrial and numerous limnic snail species have reduced it. Oxygen from dry air now had to be acquired directly trough the tissues of the pallial cavity wall.
www.weichtiere.at/english/gastropoda/terrestrial/main.h... www.weichtiere.at/english/gastropoda/terrestrial/main.html
Find out more about terrestrial snails, their classification, diet, and natural history in this illustrated natural history of snails. ... A Natural History of Terrestrial Snails ... Structure of a Snail Shell...
animals.about.com/od/mollusks/ig/World-of-Snails/ animals.about.com/od/mollusks/ig/World-of-Snails/
A Natural History of Terrestrial Snails ... What Classification Reveals About Terrestrial Snails ... Since terrestrial snails are classified as mollusks and gastropods, they posses the typical characteristics of those groups too. They have a single, often spirally coiled shell (univalve), they undergo a developmental...
animals.about.com/od/mollusks/ig/World-of-Snails/Snail-... animals.about.com/od/mollusks/ig/World-of-Snails/Snail-1.htm
Molluscs Gastropods Terrestrial Snails And Slugs Internet Resource Site for Students, Educators, and anyone wanting to learn more about the fascinating world of the Mollusc! ... Living Landscapes; Terrestrial Gastropods of the Columbia Basin, British Columbia Robert G. ForsythVolunteer, ... The Trail Of The Snail;
www.directory.manandmollusc.net/molluscs/gastropods/ter... www.directory.manandmollusc.net/molluscs/gastropods/terrestrial_snails_and_slugs/
Snail - Wikipedia, the free encyclopedia
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The word snail is a common name for almost all members of the molluscan class Gastropoda that have coiled shells in the adult stage. When the word snail is used in a general sense, it includes sea s...
en.wikipedia.org/wiki/Snail
Terrestrial snails and slugs (mollusca: Gastropoda) of Maine from Northeastern Naturalist provided by Find Articles at BNET ... ABSTRACT - Some 92 terrestrial gastropods, ... When we consider this sluggish, and too often despised snail, without legs, fins, or wings, and yet performing the important function of locomotion with...
findarticles.com/p/articles/mi_qa3845/is_200001/ai_n888... findarticles.com/p/articles/mi_qa3845/is_200001/ai_n8881466/
One thing that might be worth noting is the position of the eyes on these two terrestrial snail species shown. They have two pairs of tentacles, and the eyes are on the very tip of the uppermost pair. Almost all terrestrial species have this arrangement, and none of the aquatic snails do.
www.poweshiekskipper.org/terrestrial%20snails.htm www.poweshiekskipper.org/terrestrial%20snails.htm
We have investigated the role of the right mesocerebrum in the expression of mating behaviour in the garden snail Helix aspersa. Using an in vivo stimulation and recording technique, we provide evidence for both sensory and motor functions in the mesocerebral neuronal population.
jeb.biologists.org/cgi/content/abstract/203/6/1071
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jeb.biologists.org/cgi/reprint/203/6/1071
Identification of Mechanoafferent Neurons in Terrestrial Snail: Response Properties and Synaptic Connections. J. Neurophysiol. 87: 2364-2371, 2002. In this study, we describe the putative mechanosensory neurons, which are involved in the control of avoidance behavior of the terrestrial snail Helix lucorum.
jn.physiology.org/cgi/content/full/87/5/2364