GLOSSARY, 



COilTAININO 



THE NAMES OF THE SUB-KINGDOMS, 

 CLASSES, AND OKDERS, 



AND TUB 



SCIENTIFIC TERMS OCCURRING IN TUIS WORK.* 



Acale'ph^, an order of rayed animals, ■well known by the name 



of Sea-nettles. They are remarkable for their gelatinoua 



structure and their stinging powers. From the Greek 



akalephe, a nettle. 

 Acamhoptery'gii, an order of fishes, in which the dorsal fins 



are supported in part by spinous rays. Gr. acanthos, a spine, 



pteryx a vdng or fin. 

 Ace'piiala, a group of molluscous animals which, like the 



Oyster and Scallop, are destitute of a head. Gr. a, without; 

 ..kephale, the head. 

 Aerated, a tcjin applied to water or other liquids when im- 



..pregnated with air. 

 Aeuial Respiration, breathing which belongs to the air, and 



is carried on by lungs, as distinguished from that which baa 



reference to water, and is effected by gills. 

 Affi'nities, a term used to denote the close relationship in 



points of structure existing between different animals or 



groups of animals. Lat. ajfinis, allied to. 

 Agglu'tinateu, having the one part united to another as if glued 



together. Lat. ad, to, gluten, glue. French, aijglutiner. 

 A.G GREGATED, Collected together, Lat. aggregare, to gather to- 

 gether. 

 Albumen, a thick glairy substance like the white of an egg. 



Lat. albus, white. 



" Some words, which strictly speaking are not scientific terms, have, by the 

 ad\ice of some experienced teacliers, been introduced in the Glossary. And for 

 the same reason the Greek words, whence the terms arc in many cases derived, 

 are given, not in the Greek characters, but in the ordinary Italic letters, th« 

 Greek upsilon being throughout represented by the Icttor jr. 



