GLOSSAKY. 67o 



IsoPODA. (Gr. isos, equal ; pous, a foot.) An order of Crustaceans in which the 

 feet are alike, and equaL 



Labium. Latin for a lip ; buc applied only to the lower lip in Entomology. 



Labrum. Latin for a lip ; but applied only to the upper lip in Entomology. 



Lameixibraschiata. (Lat. lamella, a plate ; bragchia, gills.) The class of ace- 

 phalous Mollusks with gills in the form of membranous plates. 



LAiCELLiFOEM. Shaped like a thin leaf or plate. 



Lasiaeifokx. (Lat lanio, to cut or tear ; forma, shape.) Shaped like the canine 

 teeth of the Carnivora, which are called laniaries from their office. 



Laeta. (Lat. larva, a mask.) Applied to an insect in its first active state, which 

 is generally ditierent from, and as it were masks the ultimate form. Larviform, 

 shaped like a lan'a. 



Larvipakods. (LaC larva ; pario, I produce.) The insects which produce their 

 young in the condition of larvce. 



Lemniscus. (The Latin for riband.) Applied to the minute riband-shaped ap- 

 pendages of the generative pores in Entozoa. 



Lepidoptera. (Gr. lepis, a scale ; pleron, a wing.) The order of insects in which 

 the wings are clothed with fine scales, as butterflies and moths. 



Macroura. ( Gr. makros, long ; oura, taiL) The tribe of decapod Crustacea which 



have long tails, as the lobster. 

 Malacology. (Gr. malakos, soft ; logos, discourse.) The history of the soft- 

 bodied or molluscous animals, which were termed Malakia by Aristotle. 

 Malacostraca. (Gr. malakos ; ostrakon, a shell.) The name given by Aristotle 



to the modem Crustacea, because their shells were softer than those of the Mol- 



lusca, or ordinary shell-fish. 

 MA3CMALIA. (Lat. mamma, a breast.) The class of animals \^hich give suck to 



their young. 

 Mandubulata. (Lat. mandibula, a jaw.) The insects which have mouths pro- 

 vided with jaws for mastication ; the term mandible is restricted in Entomology 



to the upper and outer pair of jaws. 

 itANTLE. The external soft conti-actile skin of the MoUusca, which covers the 



viscera and a great part of the body like a cloak. 

 Marsupial. (Lat. marsupium, a purse.) The tegumentary pouch, in which the 



embryo is received after birth, and protected during the completion of its de- 

 velopment. 

 Mastodok. (Gr. mastos, a teat; odon, a tooth.) A genus of extinct quadrupeds 



allied to the elephant, but having the grinders covered with conical protuberances 



like teats. 

 Maxilla. (From the Latin for a jaw.) In Entomology restricted to the inferior 



pair of jaws. 

 Median. Having reference to the middle line of the body. 

 Meoloxa oblongata. The oblong medullary colimm at the base of the brain, from 



which the spinal chord or marrow is continued. 

 MEDC8.E. A genus or family of soft radiated animals or acalephes, so called becatise 



their organs of motion and prehension are spread out like the snaky hair of the 



fabulous Medusa. 

 Mesentery. (Gr. mesos, intermediate ; and enteros, entrail.) The membrane 



which forms the medium of connection betweeii the small intestines and the 



abdomen. 

 Mesogastric. (Gr. mesos; and gaster, stomach.) The membrane which forms 



the medium of attachment of the stomach to the walls of the abdomen. 

 Mesonotum. (Gr. mesos, middle ; notos, back.) The middle piece of that half of 



segment which covers the back. 

 Mesosternum. (Gr. mesos ,- stemon, breast.) The middle part of that half of the 



segment which covers the breast. 

 Mesothorax. (Gr. mesos, middle ; and diorax, the chest.) The intermediate of 



the three segments which form the thorax in insects. 

 Metabola. (Gr. metabole, change.) Those insects which undergo a metamor- 

 phosis. 



