GLOSSARY 193 



Ich neu'tnon (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 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, (i) the early form of an animal when it is unlike the parent, or 

 undergoes a metamorphosis ; (2) the first stage of postembryonic devel- 

 opment. 



Lat'eral, (i) situated to one side of the median plane; (2) situated in the 

 region of the hinge in a bivalve shell. 



Zep 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'lse, 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 maxillse in crustaceans. 



Me'di an, pertaining to the middle. 



Mes gle'a, a non-cellular layer between ectoderm and endoderm cells. 



Mes 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 develop- 

 ment 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 



