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GLOSSARY. 



differing in size or shape from 

 the other, as in the oyster or 

 Brachiopod shells. 

 IR'KO-RA-TED. Freckled ; sprin- 

 kled with atoms. 



LAMB DOI'DAL. Referring to the 

 lambdoidal or ./f-shaped suture, 

 with the apex upward, in a 

 mammal's skull. 



LAM-EL-LI BKAN'CHI A TA (Lat. 

 lamella, ?, leaf or sheet ; bran- 

 chia, gill). A class of mollusks 

 with large leaf-like gills. 



LAII'VA (Lat. larva, a mask). 

 The second stage of the insect, 

 a caterpillar, grub, or mag- 

 got. 



LUM'BAR (Lat. lumbus, a loin). 

 Connected with the loins. 



LTJ'MEN. The cavity of an organ. 



MA-LI'PE-DES. The fourth and 

 fifth pairs of head-appendages 

 of chilopod Myriopods. 



ME-DUL'LA (marrow). The spinal 

 cord of vertebrates. 



MEN'TUM (chin). The basal 

 piece or sclerite of the labium 

 or second maxillae of insects. 

 Submentum is the posterior 

 division of the meutum. 



MES-EN'TE-RON. The mid-gut or 

 stomach. 



MES'EN-TE RY (Gr. mesos, inter- 

 mediate ; enteron, intestine). 

 The membrane between the in- 

 testine and abdominal walls. 



ME'-SO-BLAST. The primitive, 

 embryonic mesoderm. 



ME-TAG'E NE-SIS. Alternation of 

 generations. 



ME'-TA-MERE. The same as som- 

 ite or arthromere. 



MON-(E'CI-OUS (Gr. monos, single. 

 oikos, house). With the sexual 

 glands, etc., united in the same 

 individual. 



MY'-O-BLAST. The embryonic 

 cells which become muscle 

 cells. 



MYR-I-OP'O-DA (Gr. murios, thou- 

 sand ; pous, podos, foot). The 

 class of Iracheates comprising 

 the Millepedes and Centipedes. 



NE-MAT'O-CYST (Gr. nema, a 

 thread ; kuslis, a bladder). 

 The nettling, stinging organs 

 or thread-cells or lasso-cells of 

 the jelly-fishes and polyps, 

 etc. 



NE-PHRID'I-A (Gr. nephros, kid- 

 ney). The segmental organs 

 of worms, etc. 



NEU-ROP'TE-RA (Gr. neuron, 

 nerve; pteron, wing). The 

 order of net-veined insects with 

 a complete metamorphosis. 



NID-A-MEN'TAL. Referring to a 

 nest, or egg-sac. 



NO'TO CORD (Gr. noton, back ; 

 chorde, a string), or chorda 

 dorsalis. The primitive sup- 

 port of the body of vertebrate 

 embryos, larval ascidians, and 

 the backbone of the lancelet 

 and lampreys. 



OB'TEC-TED. Covered ; con- 

 cealed. 



O'DO-NA-TA (Gr. odous, teeth). 

 The dragon flies. 



O-DON'TO-PHORE (Gr. odous, a 

 tooth ; phero, I carry). The 

 so-called tongue or lingual 

 ribbon of the higher mol- 

 lusks. 



