GLOSSARY. 



Ab-do'men (Lat. dbdo, I conceal). The posterior cavity of the body, contain- 

 ing the intestines and others of the viscera. In many Invertebrates there is 

 no separation of the body-cavity into thorax and abdomen, and it is only in 

 the higher Anmilosa that a distinct abdomen can be said to exist. 



Ab-ee'baht (Lat. aberro, I wander away). Departing from the regular type. 



Ab-nob'mal (Lat. ai, from ; norma, a rule). Irregular ; deviating from the 

 ordinary standard. 



Ab-o-ma'sdm. The fourth cavity of the complex stomach of the Enminauts. 



A-branoh'i-ate (Gr. a, without ; bragcMa, gUls). Destitute of gills or bran- 

 chise. 



A-oa-le'ph^ (Gr. dkatepTie, a nettle). Applied formerly to the Jelly-fishes or 

 Sea-nettles, and other Eadiate animals, in consequence of their power of 

 stinging, derived from the presence of microscopic cells, called ^' thread- 

 cells," m the integument. 



A-oan-tho-oeph'a-la (Gt. akantTui, a thorn ; hephaU, head). A class of para- 

 sitic worms in which the head is armed with spines. 



A-OAN-THO-ME^Ei'ifA (Gr. uMrdha ; and metra, the womb). A family of I'ro- 

 tozoa, characterized by having radiating siliceous spines. 



A-OAs-THO-PTEE-To'-i-i (Gr. okantha, spine ; pierux, wing). A group of bony 

 fishes with spinous rays in the front part of the dorsal fin. 



A-oab'i-ha (Gr. akari, a mite). A division of the AracTmida, of which the 

 Cheese-mite is the type. 



Ao-oee'tion. 



A-oeph'a-lods (Gr. a, without ; kepTiale, head;. Not possessing a distinct 

 head. 



A-oe-tab'tj-la (Lat. acetcHmlum, a cup). The suckers with which the cephalic 

 processes of many Cephalopoda (Cuttle-fishes) are provided. 



A-oe-tab'u-ldm:. The cup-snaped socket of the hip-joint in Vertebrates. 



Ac'ki-ta (Gr. ahritos, confused). A term sometimes employed as synony- 

 mous with Protozoa or the lowest division of the animal Kingdom. 



Ao-ti-nom'ekes (Gr. aUin, a ray ; meros, a part). The lobes which are 

 mapped out on the surface of the body of the Ctenop'hora, by the oteno- 

 phores, or comb-like rows of cUia. 



Ao-Tnr-o-so'MA (Gr. alctin ; and soma, body). Employed to designate the 

 entire body of any Actinozoon, whether this be simple (as in the Sea- 

 anemones), or composed of several zooids (as in most Corals). 



Ao-Tiif-o-zo A (Gr. aktin; and zoo», an animal). That division of the Coilen- 

 terata of which the Sea-anemones may be taken as the type. 



Ad-el-ae-thko-so'ma-ta (Gr. adeloa, bidden; artTvroe, joint; eoma, body). 

 An order of the Araohmida. 



Ad-doo'toe. 



A-e'bi-al. 



A-oam'io (Gr. a, without; gamos, man-iage). Applied to all forms of repro- 

 duction in which the sexes are not directly concerned. 



