378 INDEX-G LOSS ARY. 



Gustatory Organs, 369 ; Anodonta, Unio, 121 ; Amphioxus, 146 ; Rana, 

 218 ; Columba, 255 ; Lepus, 304 ; comparison of, 320. 



Gut The alimentary canal, composed of fore-gut, mid-gut, and hind-gut. 

 See Digestive System In Human Anatomy : the small intestine. 



H 



Heemal arch, 158. 



Haemal spine, 158. 



Hsemocyaniii (xJ/xet, blood ; xvuvtos, blue), 95, 98. 



Hemoglobin (aT^a) The red colouring-matter of blood, (50, 78, 95, 166. 



Hag, 153. 



Hair, 270. 



Hair-follicle The capsule in which the base of a hair is ensheathed, 270. 



Hair-germ The first rudiment of a hair in the embryo, consisting of a 



thickening of the Malpighian layer of the epidermis, 270. 

 Hair-papilla The projection at the bottom of a hair-follicle, upon which 



the hair is moulded, 270. 

 Half-facets, Capitular, 279. 

 Hallux The great toe, 176, 230, 329. 

 Hand = Manus, q.v. 

 Hare-lip, 329. 



Haversian canals The cavities in bone tissue in which the small blood- 

 vessels run, 188. 

 Haversian system An Haversian canal with concentric lamellae of bone 



surrounding it, 291. 

 Hayti, 349. 

 Head Astacus, 83, 87 ; Helix, 123 ; of Ribs = Capitulum, q.v. ; Scyllium, 



154 ; Rana, 175 ; Columba, 229 ; Lepus, 268. 

 Head kidney, in Vertebrata = Pronephros, q.v. 

 Heart Astacus, 96; Anodonta, Unio, 115; Helix, 127; Scyllium, 161; 



Rana, 195 ; Columba, 245 ; Chick, 265 ; Lepus, 289. 

 Hearts, of Lumbricus, 60. 

 Heel, 282, 328. 

 Hemichorda, 135,^341. 

 Hepatic Belonging to the liver. 

 Herring, 153, 161. 

 Heterocercal, of tail-fin Asymmetrical both externally and internally, 



154. 

 Heterogamy (sngoi, another; yajuos, a marriage) An alternation of normal 



sexual reproduction with parthenogenesis, 39. 

 Helix (Snail), 4, 122-134, 341. 



