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One of the Pectinibranchiata. Also used adjectively.

A division of Gastropoda, including those that have a comblike gill upon the neck.

Having pectinated gills.

A genus of small pectinibranch mollusks, having thick spiral shells, abundant between tides on nearly all rocky seacoasts. They feed on seaweeds. The common periwinkle is a well-known example. See Periwinkle.

One of a family of fresh-water pectinibranchiate mollusks, having a turret-shaped shell.

Any one of numerous species of freshwater pectinibranchiate mollusks, belonging to Paludina, Melantho, and allied genera. They have an operculated shell which is usually green, often with brown bands. See Illust. of Pond snail, under Pond.

ra) belonging to Limnæa, Physa, Planorbis, and allied genera. The operculated species are pectinibranchs, belonging to Melantho, Valvata, and various other genera. -- Pond spice (Bot.), an American shrub (Tetranthera geniculata) of the Laurel family, with small oval leaves, and axillary clusters of little yellow flowe…

An extensive division of pectinibranchiate gastropods, including those that have a long retractile proboscis, with the mouth at the end, as the cones, whelks, tritons, and cowries. See Illust. of Gastropoda, and of Winkle.

A divisiom of gastropods; the Pectinibranchiata.

A division of pectinibranchiate gastropods, having the head prolonged into a snout which is not retractile.