Malcostraca. The crustacean group containing crabs cobsters, shrimps, cray fish, etc.

Malaycophily. Pollinated by snails.

Malleus. The hammer shaped bone that is the outer most of the three ear ossicles.

Mallophaga. Biting Lice: Ectoparasites of birds and mammals. Unlike the sucking lice they rarely pierce the skin but use their mouth-parts to bite off small particles of feathers, etc.

Mallophyllous. Xerophytic plants, having fleshy leaves containing much water-storage tissue.

Malpigian body. A portion of the uriniferous tubule composed of Bowman’s capsule and the glomerulus.

Malpighian Thbules. Blind-ending, tubular glands, excretory in function, opening into anterior part of hind gut of in insects, arachnids, and myriapods.

Maltose. Sugar (disaccharide, with twelve carbon atoms) formed as a result of starch breakdown.

Mamma. Mammary gland.

Mammary glands. The milk-producing organs (possibly modified sweat glands) of female mammals, which provide food for the young (see milk-duct openings; e.g. teats have one duct leading from a storage cavity.

Mantle. That part of the Epidermis of a molluse which sercrtes the shell and covers the dorsal and lateral surfaces.