422 



IKDEX. 



in connection with the intestine, 

 which makes its appearance dur- 

 ing the development of the 

 emhryo, 472. 



AlligaHor, teeth of the, 340. 



Alluvium (Latin), sand, gravel, &c., 

 Drought down by rivers. 



Alternate generation, 518 547. 



Alternate 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 



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. dva, through ; 

 oTOjua, 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. dvrjp, a man ; 



of, 596 619. yvrrj, a woman), the combina- 



Am'monites, an extinct genus of j tion of male and female parts in 

 mollusks, allied to the nautilus, j the same individual, 

 which inhabited a chambered shell, jAnella'ta (Lat. annellus, a little 

 called Ammonite, from its resem- 1 ring), worms, in which the body 

 blance to the horns on the statues seems to be composed of a suc- 

 of Jupiter Ammon, xxii. 675. cession of little rings, character- 



Amor'phous (Gr. d, without ; fjiop^ri, \ ised by their red blood. 



form), bodies devoid of regular j Anel'lide, the anglicised singular of 



form. 



Amphibious (Gr. 



life), having the faculty of living 

 both in water and on land, 306. 



Amphiox v us, a genus of fishes, pecu- 

 liar structure of the, 567. 



Am'phipods (Gr. dftQi, on both 

 sides ; TTOUC, a foot), an order of 

 Crustacea which have feet for both 

 walking and swimming. 



Amphisto'ma (Gr. 

 sides ; 



Anellata. 



two, /3ioc, An'enterous (Gr. a, without ; tvrtpov, 

 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. 

 aju0i, on both Animalcule (dim. of animal), a very 

 mouth), sucto- minute animal. 



Animals, extinct, 629. 



rial parasitic worms, which have 



pores like mouths at both ends of j Animals, geographical distribution 



the body. 



Amphiu^ma, a batrachian, 626. 



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

 branous bag, shaped like a leathern 



bottle, 158. 

 An'ffitna (Gr. 



or, without ; 



blood), the name given by Aris- 



of, 578641 ; general laws, 578 



594 ; the faunas, 595622 ; 



conclusions, 623641. 

 Animals, geological succession of, 



642690. 

 Animals, metamorphoses of, 548 



577. 



