INDEX. 



621 



PAGE 



Herring . . . 432, 43S 

 Hesperornis . . .519 

 Heteroceras . . . 343 



Heterocercal . . . 440 

 Heterodont dentition . 537 



Heteromya . . -313 



Heterophrys . . .110 

 Heteropods . . 315, 328 



Heterotricha . . .112 

 Hexapoda= Insects . 257, 281 

 Hind-gut='Proctod£eum . 389 

 Hipparion . . . .581 

 Hippocampus . 412, 414, 431 



„ of brain. . 556 



Hippolyte .... 250 

 Hippopotamidse . . 577 



Hippopotamus . . . 577 

 Hippurites .... 304 

 Hirudinea . . . .188 

 „ Classification of . 195 

 Hirudo . . . 188, 196 

 „ Structure of . 189-195 

 Histology . . . 25, 32 

 Histriodrilus . . .187 

 Hoatzin=Opisthocomus. . 523 

 Holoblastic segmentation . 58 

 Holocephali . . 427 



Holoptychius . . . 430 

 Holopus .... 218 

 Holothuria . . . -215 

 Holothuroidea . . . 214 



,, Classification of 215 



Holotricha . . . .112 

 Homarus .... 250 

 Hominidee . . . 602-4 



Homo . . . 602-4 



Homocercal . . . 440 



Homodont dentition . . 537 

 Homology of organs . . 28 

 Honeycomb bag . . 578 



Horns . . 534, 578, 579 



Hornwrack=Flustra . . 200 

 Horse .... 581 



Horse-shoe Crab . . . 293 

 House fly . . . . 280 

 Howling-monkeys . . 600 

 Huanaco .... 577 

 Humerus .... 378 

 Hyaena .... 592 

 Hysenidse . ' . . -592 



