POND n.
Zoöl.), any gastropod living in fresh-water ponds or lakes. The most common kinds are air-breathing snails (Pulmonifera) 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 shru…
POSITIVELY adv.
ed may be esteemed good or evil comparatively, and positively simply. Bacon. Give me some breath, some little pause, my lord, Before I positively speak herein. Shak. I would ask . . . whether . . . the divine law does not positively require humility and meekness. Sprat. Positively charged or electrified (Elec.), having…
PULMONATA n.
b-class, of hermaphrodite gastropods, in which the mantle cavity is modified into an air- breathing organ, as in Helix, or land snails, Limax, or garden slugs, and many pond snails, as Limnæa and Planorbis.
PUPA n.
A genus of air-breathing land snails having an elongated spiral shell. Coarctate, or Obtected, pupa, a pupa which is incased in the dried-up skin of the larva, as in many Diptera. -- Masked pupa, a pupa whose limbs are bound down and partly concealed by a chitinous covering, as in Lepidoptera.