6o4 REPORT OF NEW JERSEY STi^TE MUSEUM. 



Lyrate. Shaped like a lyre or harp. 

 Lyriform. Harp-shaped. 



Mandibles. Crushing-jaws; usually fourth pair of appendages to head, and 



formed of body, masticatory part, cutting-edge, molar expansion and 



palp. 

 Marsupial pouch. Pouch in which female carries young. 

 Marsupiuni. Pouch. 

 Masticatory. Chewing. 

 Mastigobrancliicc. Epipodal plates. 

 Maxillcc. Jaws ; usually of two pairs as fifth and sixth pairs of appendages 



to head; first pair with basal part, basal lobe, masticatory lobe and 



palp ; second pair with basal part, inner and outer lobes. 

 Maxillipeds. Foot-jaws; usually of several pairs, or as many as three, often 



formed with basal part, basal lobes, masticatory lobes and palp. 

 Median eye. A single eye, as in many entomostraca. 

 Megalops. Big-eyed, with reference to stage in development arising after the 



zoea stages in higher decapods. 

 Merus. One of joints of foot-jaws or appendages. 

 Mesenteron. Intestinal cavity at an early stage. 

 Mesosome. Hind portion of anterior divison of body. 

 Metamere. One of a lengthwise series or part which are serially homologous 



with one another. 

 Metameric. Pertaining to a metamere. 

 Metamorphosis. Transformation. 



Metanauplius. Second or segmented stage of the nauplius. 

 Metasome. Front portion of posterior division of body. 

 Microscopic. Very minute, with reference to the microscope. 

 Mobile. Free or easily moved. 

 Monodactyl. A single finger. 

 Motile. With motion. 



Moult. Complete change of shell with growth. 

 Mouth. Aperture of head in which food is received. 

 Mucronate. Narrowed to a point. 

 Multiarticulate. With many joints. 

 Mysis. Stage of development in higher Crustacea following the zoea stage. 



Natatory. Swimming. 



Nauplius. Stage of embryo before hatching, or as free-swimming. 

 Nephridia. Renal organs, corresponding to the kidneys of the higher animals. 

 Nodose. Knotty or knobby. 



Obovate. Ovate, with distal end wider than the other. 



Obpyriforni. Pear-shaped, with distal end wider than the other. 



Occhident. Closed up. 



Ocellus. Like a little eye. 



(Ecology. The science of animal and vegetable economy ; often written 



ecology. 

 Olfactory. Pertaining to the sense of smell. 



