#Hy men op' te ra#, order of insects to which belong bees, ants, and wasps. #Ich neu' mon# (ic nu' mon), an insect that deposits its eggs upon or in other insects, upon which its larvæ will feed. #In ha' lent#, flowing or moving toward the body. #In ha' lent pores#, the outer ends of the canals in the body-walls of sponges. #Ink-sac#, a defensive structure found in the squid. #Ju' gu lar#, pertaining to the throat. #La' bi um#, lower lip. #La' brum#, upper lip. #La mell' i branch i a' ta#, the class to which the clam, oyster, etc., belong; bivalves, sometimes called pelecypoda. #Lar' va#, (1) the early form of an animal when it is unlike the parent, or undergoes a metamorphosis; (2) the first stage of postembryonic development. #Lat' er al#, (1) situated to one side of the median plane; (2) situated in the region of the hinge in a bivalve shell. #Lep i dop' te ra#, butterflies and moths. #Lig' a ment#, a strong band or cord binding two structures together. #Lin' gual#, pertaining to the tongue. #Lip#, any structure that bounds an orifice. #Mam' mal#, vertebrates with a covering of hair or fur. #Man' di ble#, a jaw or a jaw-like mouth-part. #Man' tle#, folds of skin covering the body of a bivalve. #Masking#, the covering of an animal by some object so as to hide its identity. #Max il' læ#, the appendages just back of the mandibles in arthropods. #Max' il la ry#, pertaining to or situated near the jaw. #Max il' li peds#, the appendages back of the maxillæ in crustaceans. #Me' di an#, pertaining to the middle. #Mes o gle' a#, a non-cellular layer between ectoderm and endoderm cells. #Mes o tho' rax#, the middle division of the thorax. #Met a car' pal#, one of the bones between the wrist (carpus) and the fingers (phalanges). #Met a mor' pho sis#, the series of changes which take place in the development of some animals after they are hatched. #Met a tar' sal#, one of the bones of the metatarsus, between the ankle and the toes. #Met a tho' rax#, the most posterior region of the thorax. #Mi cro nu' cle us#, _see_ Nucleolus. #Mimicry#, a method of protection due to the resemblance of an unprotected to a well-protected animal. #Mol lus' ca#, the branch of animals to which clams, snails, etc., belong. #Mo nœ' cious#, reproductive organs in different regions of the same individual. #Mouth#, the anterior opening into the digestive cavity. #Neph rid' i um# (pl. #neph rid' i a#), a tubule functioning as a kidney in some of the worms. #Net' tle cells#, the stinging cells found in the cœlenterates. #Noc tur' nal#, pertaining to night. #Nu cle' o lus# (pl. #nucleoli#), a very small, dense, dark-staining body, either within the nucleus or near it. In the latter case it is often called the _paranucleus_ or _micronucleus_. #Nu' cle us# (pl. #nuclei#), a dense bit of protoplasm usually near the center of a cell, often staining dark. #O cel' lus#, a simple eye.