422 



INDEX. 



in connection with the intestine, 

 which makes its appearance dur- i 

 ing the development of the 

 embryo, 472. 



Alliga'tor, teeth of the, 340. 



Allu'vium (Latin), sand, gravel, &c., 

 orought down by rivers. 



Alternate generation, 518 547. 



Alter'nate reproduction, 516 532; 

 consequences of, 533, 547 ; dif- 

 ferences between, and metamor- 

 phosis. 536. 



Ambula'cra (Lat. ambulacrum, an 

 avenue or place for walking), the 

 perforated series of plates in the 

 shell of the sea-star or sea-urchin. 



Am'bulatory (Lat. ambulo, I walk), 

 an animal, or a limb for walking. 



Amer'ica, distribution of the faunas 

 of, 596619. 



Am'monites, an extinct genus of 

 mollusks, allied to the nautilus, i 

 which inhabited a chambered shell, 

 called Ammonite, from its resem- 

 blance to the horns on the statues 

 of Jupiter Ammon, xxii. 675. 



Amor'phous (Gr. a, without ; fiop^fj, 

 form), bodies devoid of regular 

 form. 



Amphibious (Gr. ajw0i, two, (3iO, 

 life), having the faculty of living 

 both in water and on land, 306. 



Amphiox'us, a genus of fishes, pecu- 

 liar structure of the, 567. 



Am'phipods (Gr. dp<f>i, on both 

 sides ; TTOWC, a foot), an order of 

 Crustacea which have feet for both 

 walking and swimming. 



Amphisto v ma (Gr. dp^i, on both 

 sides ; aTopa, a mouth), sucto- 

 rial parasitic worms, which have 

 pores like mouths at both ends of) 

 the body. 



Amphiu v ma, a batrachian, 626. 



Ampul'la (Lat. a bottle}, a mem- 

 branous bag, shaped like a leathern 

 bottle, 158. 



An'aema (Gr. d, without ; al/jia, 

 blood), the name given by Aris- 



totle to the animals which have 

 no red blood, and which he sup- 

 posed to be without blood. 



An'alogue, a part or organ in one 

 animal which has the same func- 

 tion as another part or organ 

 in a different animal ; see HOMO- 

 LOGUE. 



Anal'ogy, distinguished from affinity, 

 16. 



Anas'tomose (Gr. aver, through ; 

 (rro/Lia, mouth), when the mouths 

 of two vessels come into contact 

 and blend together, or when two 

 vessels unite as if such kind of 

 union had taken place. 



Anat'ifa, or duck barnacle, metamor- 

 phoses of the, 553 556. 



Androg'ynous (Gr. dvrip, a man; 

 ywri, a woman), the combina- 

 tion of male and female parts in 

 the same individual. 



Anella'ta (Lat. annellus, a little 

 ring), worms, in which the body 

 seems to be composed of a suc- 

 cession of little rings, character- 

 ised by their red blood. 



Anel'lide, the anglicised singular of 

 Anellata. 



An'enterous (Gr. or, without; tvTtpov, 

 a bowel), the animalcules of in- 

 fusions which have no intestinal 

 canal. 



Animal heat, 399. 



Animal life, organs and functions 

 of, 76184. 



Animal and vegetable kingdoms, 

 three great divisions of the, 67. 



Animarcuie (dim. of animal), a very 

 minute animal. 



Animals, extinct, 629. 



Animals, geographical distribution 

 of, 578 641 ; general laws, 578 

 594 ; the faunas, 595622 ; 

 conclusions, 623 641. 



Animals, geological succession of, 

 642690. 



Animals, metamorphoses of, 5-i8 

 577. 



