A Guide for the Study of Animals Part 61

#Gre ga' ri ous#, a.s.sociations of animals with little division of labor; gathering in flocks, herds, etc.

#Gullet#, the inner end of the oral groove.

#He mip' te ra#, insects with a piercing organ for sucking their food, Bugs.

#He pat' ic#, pertaining to the liver.

#Her biv' o rous#, plant-eating.

#Hock#, the joint of the hind leg situated between the tibia and tarsus, corresponding to the ankle in man.

#Hu' me rus#, the long bone of the upper part of the arm or fore limb.

#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 larvae will feed.

#In ha' lent#, flowing or moving toward the body.

#In ha' lent pores#, the outer ends of the ca.n.a.ls 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 cla.s.s 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 sh.e.l.l.

#Lep i dop' te ra#, b.u.t.terflies 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 ident.i.ty.

#Max il' lae#, 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 maxillae 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 n' 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 clenterates.

#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.