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ZOOLOGY. 



especially insects, in which the 

 ovaries or reproductive organs 

 are imperfectly developed ; and 

 which produce eggs or young by 

 budding. 



AURELIA. Old term for the pupa 

 of an insect. 



AURICLE (Lat. auricula, a little 

 ear). One of the cavities of the 

 heart of mollusks and verte- 

 brates. 



AZYGOS (a, without ; zugon, a 

 yoke, a pair). An organ, such as 

 a nerve or artery, situated in the 

 middle line of a bilaterally sym- 

 metrical animal, which has 

 therefore no fellow. 



BLASTODERM (blastos, a bud or 

 sprout ; derma, skin). The outer 

 layer of the germ -cells of the 

 embryo. 



BIFID. Divided into two parts ; 

 forked. 



BRANCHIA. A gill or respiratory 

 organ of aquatic animals. 



BUCCAL. Relating to the mouth 

 or cheeks. 



BULLATE. Blistered. 



CADUCIBRANCHIATE (Lat. caducus, 

 falling off ; Gr. bragchia, gills). 

 Applied to those Batrachia in 

 which the gills become absorbed 

 before adult life. 



CALCARATED. Armed with spurs. 



CALYX. A little cup ; often ap- 

 plied to the body of a Crinoid. 



CAPITATE. Ending in a head or 

 knob. 



CHELA. The terminal portion of 

 a limb with a movable lateral 

 part, like the claw of a crab ; as 

 in the chelate maxilla of the 

 scorpion. 



CHI ASM A (Gr. chiasma, a crossing.) 



The commissure of the optic 

 nerves in most vertebrates. 



CHITIN (Gr. chiton, a tunic). The 

 horny covering of insects, etc. 



CHYLE (Gr. chulos, juice). The 

 milky fluid resulting from the 

 action of the digestive fluids on 

 the food or chyme. 



CHYME (Gr. chumos, juice). The 

 acid, partly fluid or partly di- 

 gested food, produced by the ac- 

 tion of the gastric juice on the 

 food. 



CTLIUM (pi. cilia). Microscopic 

 filaments attached to cells, usu- 

 ally within the body, and mov- 

 ing usually rhythmically, 



CCECAL. Ending blindly or in a 

 cul-de-sac. 



CCECUM. A blind sac; usually ap- 

 plied to one or more append- 

 ages of the digestive canal. 



CGENENCHYMA (Gr. koinos, com- 

 mon ; chumos, chyme or juice). 

 Applied in polyps to the coral 

 mass containing the chymiferous 

 or nutritive canals connecting the 

 different polyps. 



COMMISSURE. The nerves con- 

 necting two ganglia. 



CONCOLOROUS. Of the same color 

 as another part. 



CONDYLE (Gr. kondulos, a 

 knuckle). The articular sur- 

 face of a bone, especially of the 

 occiput. 



CORTICAL. Relating to the cortex 

 or inner skin ; external as op- 

 posed to medullary. 



COSTAL (Lat. costa, a rib). Relat- 

 ing to the ribs. 



CRIBRIFORM (Lat.cn&rwm, a sieve ; 

 forma, form). With perfora- 

 tions like those of a sieve. 



CROP. A partial dilatation of the 

 gullet or oesophagus, the inglu- 



