690 



GLOSSARY. 



embracing the spiders, scor- 

 pions, aud mites. 



A'RE-O-LATE. Furnished with 

 small areas; like a network. 



A-RIS'TATE. Furnished with a 

 hair. 



AR-THRO'PO-DA (Gr. artTiros, a 

 joint; pans, podos, foot). Those 

 Articulata with jointed feet, 

 such as crabs, bees, etc. 



AR-TI-CU-LA'TA (L&t.articulus, di- 

 minutive of artus, a joint). 

 Cuvier'ssubkiugdom 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 the ox. 



A-SEX'U-AL. Applied to animals, 

 especially insects, in which the 

 ovaries or reproductive organs 

 are imperfectly developed ; aud 

 which produce eggs or young 

 by budding. 



AU-RE'LI-A. Old term for the 

 pupa of an insect. 



AU'RI-CLE (Lut. 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-DA (Gr. baino, to walk). 

 The thoracic legs of insects. 



B^E'NO-SOME (Gr. baino, to walk; 

 soma, body). The thorax of in- 

 sects. 



BI'FID. Divided into two parts; 

 forked. 



BLAS'TO-DERM (blastos, a bud or 



sprout ; derma, skin). The outer 



layer of the germ-cells of the 



embryo. 

 BLAS TO-PORE. The mouth of 



the gastrula. 

 BLAS TO- SPHERE. The embryo 



when consisting of a single 



cell-layer. 

 BRAN CHI- A. A gill or respiratory 



organ of aquatic animals. 

 BRAN 'CHI- AL. Relating to the 



gills or branchiae. 

 BUC'CAL. Relating to the mouth 



cavity; or rarely to the cheeks. 

 BUL'LATE. Blistered. 



CA-DU-CI-BRAN'CHI-ATE (Lat. ca- 

 ducus, falling off; Gr.bragchia, 

 gills). Applied to those Ba- 

 tracJiia in which the gills be- 

 come absorbed before adult life. 



CAL'CA-RA-TED. Armed with 

 spurs. 



CA'LYX. A little cup; often ap- 

 lied to the body of a Criuoid. 



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-PHAL'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 



