318 



GLOSSARY. 



embracing the spiders, scor- 

 pions, and mites. 



A'ke-o-late. Furnished with 

 small areas; like a network. 



A-ris'tate. Furnished with a 

 hair. 



Ar-thro'po-da (Gr. arthros, a 

 joint; pous, podos, foot). Those 

 Articulata with jointed feet, 

 such as crabs and insects. 



Ar-ti-cu-la'ta (L&t.articulus, di- 

 minutive of artus, a joint). 

 Cuvier's subkingdom of worms, 

 Crustacea, and insects. 



Ar-ti-o-dac'ty-la (Gr. artios, 

 even; daktulos, finger or toe). 

 Those Ungulates with an even 

 number of toes, as tbe ox. 



A-sex'tj-al. Applied to animals, 

 especially insects, in which the 

 ovaries or reproductive organs 

 are imperfectly developed ; and 

 which produce eggs or young 

 by budding. 



Au-re'li-a. Old term for the 

 pupa of an insect. 



Au'ri-cle (L:it. auricula, a little 

 ear). One of the cavities of 

 the heart of mollusks and verte- 

 brates. 



Az'y-gos {a, without ; zugon, a 

 yoke, a pair). An organ, such 

 as a nerve or artery, situated 

 in the middle line of a bilater- 

 ally symmetrical animal, which 

 has therefore no fellow. 



B^e-no'po r> \ (Gr. baino, to walk). 

 The thoracic legs of insects. 



B.e'no-some (Gr. baino, to walk; 

 soma, body). The thorax of in- 

 sects. 



Bifid. Divided into two parts; 

 forked. 



Blas'to-derm (blastos, a bud or 

 sprout; derma, skin). The first- 

 formed layer of the germ-cells 

 of the embryo. 



Blastopore. The mouth of 

 the gastrula. 



Blas to sphere. The embryo 

 when cousistingof a single cell- 

 layer. Thesameastheblastula. 



Blas'tu-la. The embryo with 

 but a single layer of cells. 



Bran'chi-a. A gill or respiratory 

 organ of aquatic animals. 



Buccal. Relating to the mouth 

 cavity; or rarely to the cheeks. 



Bul'late. Blistered. 



Ca-du-cibran'chi-ate (Lat. ca- 

 ducus, falling off; Gr.bragchia, 

 gills). Applied to those Ba- 

 trachia in which the gills be- 

 come absorbed before adult life. 



Cal'ca-ra-ted. Armed with 

 spurs. 



Ca'ltx. A little cup; often ap- 

 lied to the body of a Crinoid. 



Cap'i tate. Ending in a head or 

 knob. 



Cen-trum. The body or central 

 part of a vertebra. 



Ce-phal'ic. Relating to the 

 cephalum or head. 



Ce-pmai/o-mere. A cephalic seg- 

 ment of an Arthropod. 



Ce-phal'o-some. The head of in- 

 sects, Arachnida and Myrio- 

 poda. 



Cer-co'po-da (Gr. cercos, tail; 

 pous, podos, foot). The last pair 

 of jointed abdominal appen- 

 dages of insects; the "cerci." 



Che'la. The terminal portion of 

 a limb with a movable lateral 

 part, like the claw of a crab; as 



