31. The living siphonariids are all marine pulmonates, false sea limpets that breathe air. 32. This limpet is up to 41 millimeters long. 33. In early Holocene, limpets were the dominant species represented within the midden levels. 34. Sharp steering and limpet cornering give uncanny responses, modest body roll and terrific composure. 35. However, many other members of the Vetigastropoda do not have the morphology of limpets . 36. The true limpets have an internal structure much like that of other members of Mollusca. 37. Limpets can be long lived, with tagged specimens surviving for more than 10 years.38. There are some enoplan species known to feed upon barnacles, limpets , and polychaetes. 39. This foot exerts a strong suction, adhering the keyhole limpet to its hard substratum. 40. The families in this clade are basically air-breathing freshwater snails including freshwater limpets .
