12j6 OYSTERS, AND ALL ABOUT THEM. 



Animal, the size of organs not modified or affected by a change in the 

 habits of an, 164. 



Animals, All, either monoecious or dioecious, 101. 

 No two entirely the same, 101. 

 Secretion of carbonate of lime by, 95. 

 Marine, Organization of, not rigorously correct, 227. 

 Molluscous, Chemical composition of, 315. 

 Living on oyster shells, 1058. 



Animalcules (Lat. animalculum, a little animal; animals discernible only 

 by the microscope) 81, loi ; in chalk, 213 ; in levigated whiting, 

 213; shield bearing, 213; size of, 213; in polishing slate, 214; 

 quantity of, to a grain, 21 1\; weight of a single one 214 ; ingenious 

 device to cast light on immense numbers relative to, 254. 



" Annals and Magazine of Natural History" cited 900. 



Annelids (Lat. annulus, a ring, and eidos, form animals like the earth- 

 worm, whose bodies are formed by a succession of rings) 1228. 



Annianus, 50. 



ANOMIA (a genus of oysters) 128; described by Linnaeus, 141, 142; 

 popularly designated "Silver-shells," "jingle-shells," 142; no 

 species of, found north of Iceland, 142 ; the originator of this name, 

 141 ; wrongfully applied by him, 141 ; and afterwards by Linnaeus, 

 141 ; Poll's name for the, 142 ; in what its shell resembles the shell 

 of the Argiope, 142 ; fossil shells of, found at Uddevalla, 1^2. 

 Ephippiuni, 128; described, 142-47; synonymous species of, 144; 

 said to be poisonous, 145 ; Professor Eyton on, 145 ; remarkable 

 structure of the plug of, 145 ; adaptation to circumstances of, 146, 

 147 ; HABITAT of, 143 ; wide distribution of in European seas, 

 143 ; extensive range of the, 144; dredged in the Scandinavian 

 seas, 144; Protean variety in shape of shell of the, 144; Variety, 

 " Squamula" 144, 147; " aculeata" 144; lt cylindrical 144. 

 Patelliformis, 128; described, 147-150; and A. ephippium, difference 

 between, 149; number of names assigned to each, 149; same 

 species as the Ostreum Striatum of Da Costa, 149 ; the latter 

 placed by some conchologists in the genus Placunanomia of 

 Broderip, 149; distinctive character of that genus same as in 

 Placuna and Placenta, 149, 150; HABITAT, 148, 149; Variety, 

 striata, 148; a tertiary fossil, 148; Pectiniforinis (Philippi) 149; 

 taken in the Gulf of Lyons, 149; recorded from Sitka Sound, and 

 north west coast of America, 149; tubularis, 147. 



