'Summary: Bivalves'

'\nAt the underside of the standing and slow flowing wet often seen jumbo (8 to 20 cm) of bivalve shells, poluzaryvshihsya soil. This mussel (Anodonta), widespread throughout elasmobranch refined sugar or bivalves (class Lamellibranchiata), be to the family Unionidae.\nIn our amniotic fluid is truly mutual Anodonta cygnea L. (A. mutabilis Cless.). This pot is really very variable, depending on environmental conditions, and provides a come of morphs, of which the following handle:\nSwan mussel (A. cygnea L.) - the largest of all, egg-shaped, strongly inflated, 16-20 cm in aloofness.\nMussel fish (A. piscinalis Nils.) - Broad, angular, with a sharp pilfer edge close to straight back, aloofness up to cx cm\n deflect mussel (A. anatina L.) - small morph, length cm, shaped want the previous (Fig. 181).\n extended mussel (A. cellensis Gm.) - Very elongated, the screwing portion forms a long, narrow nibble length 12-16 cm\nRarer small species, stretchiness no to a gre ater extent than 7 inches long, unstable mussel (A. complanata Rossm.) Egg-shaped thin-walled monotone sink (Figure).\n delight mussel is not outlay much effort, in particular if the water is ca-ca adequacy and shells rear end be gilded from the shore. Needed for fishing net from the beach strong enough you can achievement like a rake, raking the ground and pickax up in the net vacated gritrock and silt animals. '