Wolf spider  (Pardosa amentata)

Information authenticated by Dr Peter Merrett of the British Arachnological Society:
http://www.britishspiders.org.uk/index.html

• Abdomen: in arthropods (crustaceans, insects and arachnids) the abdomen is the hind region of the body, which is usually segmented to a degree (but usually not visibly in spiders). In crustacea (e.g. crabs) some of the limbs attach to the abdomen; in insects the limbs are attached to the thorax (the part of the body nearest to the head) and not the abdomen. In vertebrates the abdomen is the part of the body that contains the internal organs (except the heart and lungs).
• Cocoon: a sheath of silk, which is spun around the pupae of some insects (a pupa is a stage in an insect's development, when huge changes occur that reorganise the larval form into the adult form. In butterflies the pupa is also called a chrysalis).
• Palps: in invertebrates, palps are sensory appendages located near the mouth.
• Spinnerets: tube-like, movable silk handling structures found at the tip of the abdomen (the hind region of the body) in spiders. There are four pairs of these organs, but in most species there are fewer (usually three). The silk is produced by the silk organs as a liquid, which passes through the spinnerets and is put under tension until the silk becomes a solid thread.

1. National Biodiversity Network Species Dictionary (Jan 2003): http://www.nhm.ac.uk/nbn/
2. Roberts, M. J (1993) The spiders of Great Britain and Ireland, part 1- text. Harley Books, Colchester.
3. Roberts, M. J. (1995) Collins field guide- spiders of Britain and Northern Europe. Harper Collins Publishers, London.
4. Cloudsley-Thomson, J.L. & Sankey, J (1961) Land Invertebrates. Methuen & Co Ltd., London.
5. Peter Merrett (2003) Pers. comm.
6. Nichols, D., Cooke, J., Whiteley, D. (1971) The Oxford Book of Invertebrates. Oxford University press, Oxford.