354 GLOSSARY. 
CoryNIDA (Gr. korune, a club). An order of Hydroid Zoophytes. 
CosTaL (Lat. costa, arib). Connected with the ribs. 
Cranium (Gr. kranion, the skull). The bony or cartilaginous case in 
which the brain is contained, 
ORASPEDA (Gr. kraspedon, a margin or fringe). The long, convoluted 
cords, containing thread-cells, which are attached to the free margins 
| of the mesenteries in a Sea-anemone. 
CREPUSCULAR (Lat. crepusculum, dusk). Applied to animals which are 
active in the dusk or twilight. : 
ORINOIDEA (Gr. krinos, a lily ; eidos, form). An order of Echinodermata 
comprising forms which are usually stalked, and sometimes resemble 
lilies in shape. 
CroconiLia (Gr. krokodetlos, a crocodile). An order of Reptiles. 
Crop. A partial dilatation of the gullet, technically called ‘‘ingluvies.” 
Sometimes it has the form of a membranous bag appended to the gullet. 
CRUSTACEA (Lat. crusta, a crust). A class of articulate animals, compris- 
ing Crabs, Lobsters, &c., characterised by having a hard shell or crust, 
which they cast periodically. 
CTENOID (Gr. kteis, a comb; eidos, form). Applied to those scales of 
fishes, the hinder margins of which are fringed with spines or cut into 
comb-like projections. 
OTENOPHORA (Gr. ktéeis, a comb; hero, I carry). An order of Actinozoa, 
comprising oceanic creatures, which swim by means of ‘‘ ctenophores,” 
or bands of cilia arranged in comb-like plates. 
CURSORES (Lat. curro, I run). An order of Birds, comprising birds in 
which there is no power of flight, but the body is formed for running 
vigorously. 
CUTICLE (Lat. cuticula, diminutive of cutis, skin). The transparent pellicle 
which forms the outer layer of the body in Jnfusoria. The outermost 
layer of the integument generally. Ms: 
CyrcLoIp (Gr. kuklos, a circle; eidos, form). Applied to those scales of 
fishes which have a regularly circular or elliptical outline. 
Cystic (Gr. kustis, a bladder). Applied to the embryonic forms of the 
Tape-worms, which were originally described as a distinct order of Para- 
sitic Worms under the name of Cystica, or ‘‘ Bladder-worms.” 
CyYSTOIDEA (Gr. kustis, a bladder; eidos, form), An extinct order of Echi- 
nodermata. 
Dercapopa (Gr. deka, ten; podes, feet). The division of Crustacea with ten 
legs adapted for walking (e.g., Crabs and Lobsters). Also, the family 
of Cuttle-fishes (Cephalopoda) in which the mouth is surrounded by ten 
processes or “‘ arms.” 
Dxcripvuovws (Lat. decido, I fall off). Applied to parts which fall off or are 
shed during the life of the animal. 
DEINOSAURIA (Gr. deinos, terrible; saura, alizard). An extinct order of 
Reptiles. 
DenTAL (Lat. dens, a tooth), Connected with the teeth. 
DENTIROSTRES (Lat. dens, a tooth; rostrum, beak). The division of the 
Perching Birdsin which the upper mandible of the bill has its lower 
margin toothed. 
DIAPHRAGM (Gr. diaphragma, a partition). The *‘ midriff,” or the muscle 
which in Mammalia separates the cavity of the chest from that of the 
abdomen. 
DIBRANCHIATA (Gr. dis, twice ; bragchia, gills). The order of Cephalopoda 
(comprising the Cuttle-fishes, &c.) in which only two gills are present. 
DicynopontiA (Gr. dis, twice; kuon, dog; odous, tooth). An extinct 
' order of Reptiles, called by Owen Anomodontia. 
