S38 GLOSSARY. 



LY-EN-CEPH'A-LA (Gr. luo, I loose ; egTcephalos, brain). A primary division 

 of Mammals, according to Owen. 



MAC-RO-DAC'TY-LI (Gr. malcros, long; daTctulos, a finger). A group of the 

 Wading Birds. 



MA-CRU'RA (Gr. mdkros, long; oura, tail). A tribe of Decapod Crustaceans 

 with long tails (e. g., the Lobster, Shrimp, etc.). 



MAD-RE-POR'I-FORM. Perforated with small holes, like a coral ; applied to the 

 tubercle by which the ambulacral system of the Echinoderms mostly com- 

 municates with the exterior. 



MAX-A-CO-DERM'A-TA. 



MAL-A-COS'TRA-CA (Gr. malakos, soft; ostrakon, shell). A division of Crus- 

 tacea. Originally applied by Aristotle to the entire class Crustacea, because 

 their shells were softer than those of the Mollusca. 



MAL-LOPH'A-GA (Gr. mallos, a fleece; phago, I eat). An order of Insects 

 which are mostly parasitic upon birds. 



MAM-MA'LIA (Lat. mamma, the breast). The class of Vertebrate animals 

 which suckle their young. 



MAN'DI-BLE (Lat. mandibuLum, a jaw). The upper pair of jaws in Insects -, 

 also applied to one of the pairs of jaws in Crustacea and Spiders, to the beak 

 of Cephalopoda, the lower jaw of Vertebrates, etc. 



MAN'TLE. The external integument of most of the Mollusca, which is largely 

 developed, and forms a cloak in which the viscera are protected. Techni- 

 cally called the " pallium." 



MA-NU'BRI-UM (Lat. for a handle). The polypite which is suspended from 

 the roof of the swimming-bell of a Medusa, or from the gonocalyx of a 

 medusiform gonophore among the Hydrozoa. 



MA'NUS (Lat. for the hand). The hand of the higher Vertebrates. 



MAR-SIP-O-BRANCH'I-I (Gr. marsipos, a pouch ; bragc/iia, gills). The order of 

 Fishes comprising the Hag-fishes and Lampreys, with pouch-like gills. 



MAR-SU-PI-A'LI-A (Lat. marsupium, a pouch). An order of Mammals in which 

 the females mostly have an abdominal pouch in which the young are carried. 



MAS'TAX (Gr. for mouth). The muscular pharynx or u buccal tunnel" into 

 which the mouth opens in most of the Eotifera. 



MAS-TI-CA'TO-RY (Lat. mastico, I chew). Applied to parts adapted for chewing. 



MAX-IL'L^E (Lat. for jaws). The inferior pair or pairs of jaws in the Arthro- 

 poda (Insects, Crustacea, etc.). The upper jaw-bones of Vertebrates. 



MAX-IL LI-PEDES (Lat. maxilla, jaws ; peg, the foot). The limbs in Crustacea 

 and Myriapoda which are converted into masticatory organs, and are com- 

 monly called " foot-jaws." 



ME-DUL'LA (Lat. for marrow). Applied to the marrow of bones, or to the 

 spinal cord, with or without the adjective " spinal'ig." 



ME-DU'S.E. An order of Hydrozoa, commonly Known as Jelly-fishes (Disco- 

 pJiora, or AcalepJuz), so called because of the resemblance of their tentacles 

 to the snaky hair of the Medusa. Many Medusae are now known to be 

 merely the gonophores of Hydrozoa. 



ME-DU'SI-FORM. Eesembling a Medusa in shape. 



ME-DU'SOID. Like a Medusa ; used substantively to designate the medusiform 

 gonophores of the Hydrozoa. 



MEM-BRA'NA KIC'TI-TANS (Lat. nicto, I wink). The third eyelid of Birds, etc. 



MEN'TUM (Lat. for the chin). The basal portion of the laoium or lower lip 

 in Insects. 



ME-RO-STOM'A-TA (Gr. meron, thigh; stoma, mouth). An order of Qnutaeta 

 in which the appendages which are placed round the mouth, and which 

 officiate as jaws, have their free extremities developed into walking or pre- 

 hensile organs. 



MES-EN-TE'RI-ES (Gr. mesos, intermediate ; enteron, intestine). In a restricted 

 sense, the vertical plates which divide the somatic cavity of a Sea-anemone 

 (Actinia} into chambers. 



MES-O-PO'DI-UM (Gr. mesos, middle; pous, foot). The middle portion of the 

 "foot "of Molluscs. 



