INDEX-GLOSSARY. 385 



Metastoma (/tira, behind ; errata, a mouth), in the Crayfish The lower lip, 



89. 



Metatarsus, 188. 

 Metatheria, 346. 

 Metazoa (pira,, after, later ; &/, living creatures) Animals consisting of 



more than one cell, 339, Chap. ii. to end, 7 1 . 

 Micronucleus, 72. 



Micropyle (tumps, little ; -rvXti, door), 119. 

 Microzooid, 15, 72. 

 Mid-brain The part of the brain developed from the second cerebral 



vesicle, 169, 211, 253, 302. 

 Mid-gut (Mesenteron) That part of the alimentary canal which is lined by 



epithelium of endodermic origin, 48, 57, 78, 94. 

 Mitosis (PITO;, a thread) = Karyokinesis, q.v. 

 Mississippi, 349. 



Mollusca (mollis, soft), 340; Chap, vii., 109, 161. 

 Monocystis, 17, 18, 64. 

 Monodelphia, 346. 

 Monotremata, 345, 349, 352, 353, 

 Morphology (pitfii, a shape ; xya,-, speech, discourse), 1,2; Amoeba, 7 ; 



Vorticella, 11; Hydra, 19; Distomum, 28; Tsenia, 40; Ascaris, 47; 



Lumbricus, 54 ; Hirudo, 75 ; Astacus, 83 ; Anodonta, Unio, 109 ; 



Helix, 122 ; Amphioxus, 136 ; Scyllium, 153 ; Eana, 175 ; Columba, 



229 ; Lepus, 268 ; Homo, 322. 



Morula (dim. of morum, a mulberry) A solid blastula, 38. 

 Mosaic vision, 104. 

 Motor, of Nerves Supplying muscular tissue and conveying impulse 



leading to its contraction, 102, 146, 209, 216. 

 Moults, 106. 

 Mouth, 19, 29, 38, 47, 54, 57, 70, 76, 92, 113, 125, 157, 241, 268, 284, 313, 



329. 



Mouth-cavity = Cavity, buccal, q.v. 

 Mud-fish, 153. 

 Multipolar, 145, 214. 

 Muridae, 349. 

 Muscle, 209; Involuntary m.,208; Striped or striated m., 91, 145, 202, 



208, 209; Unstriped m., 132, 192: Voluntary m., 208; Abductor, 91 ; 



Adductor, 91, 109 ; Circular, 65, 81 ; of Eye, 174, 222, 256, 305 ; Ex- 

 tensor, 91 ; Flexor, 91 ; Gastric, 93 ; of Heart, 291 ; Longitudinal, 65, 



81; Oblique, 81, 174, 222; Papillary, 245; Protractor, 29, 65, 119; 



Rectus, 174, 222; Retractor, 29, 81, 119; Spindle m., 123, 132. 

 Muscle-cell, 81. 



2 25 



