GLOSSARY. 329 



CRE-PUS'CIJ-LAR (Lat. crepusculum, dusk). Applied to animals which are 

 active in the dusk or twilight. 



CRI-NOI'DE-A (Gr. Tcrinon, a lily ; eidos, form). An order of EcMnodemnata, 

 comprising forms which are usually stalked, and sometimes resemble lilies 

 in shape. 



CROC-O-DIL'IA (Gr. krokodeilos, a crocodile). An order of Reptiles. 



CKOP. A partial dilatation of the gullet, technically called " mgluvies." 



CKUS-TA'CE-A (Lat. cru$ta, a crust). A class of articulate animals, comprising 

 Crabs, Lobsters, etc., characterized by the possession of a hard shell or 

 crust, which thev cast periodically. 



CTEN'O-CYST (Gr. few, a comb ; kustis, a bag or cyst). The sense-organ (prob- 

 ably auditory) which occurs in the Ctenophora. 



CTE'NOID (Gr. kteis, a comb ; eidos, form). Applied to those scales of fishes, 

 the hinder margins of which are fringed with spines or comb-like pro- 

 jections. 



CTE-NOPH'O-RA (Gr. Icteis, a comb ; andphero, I carry). An order of Actinozoa, 

 comprising oceanic creatures, which swim by means of " ctenophores," or 

 bands of cilia arranged in comb-like plates. 



CUR-SO'KES (Lat. curro, I run). An order of Aves, comprising birds destitute 

 of the power of flight, but formed for running vigorously (e. g., the Ostrich 

 and Emeu). 



CCS'PI-DATE. Furnished with small pointed eminences or " cusps." 



CU'TI-CLE (Lat. cuticula, dim. of cutis, skin). The pellicle which forms the 

 outer layer of the body among the Infusoria. The outer layer of the in- 

 tegument generally. 



CU'TIS (Lat. for skin). The inferior vascular layer of the integument, often 

 called the cutis vera, the corium, or the derma. 



CY'CLOID (Gr. kuklos. a circle ; eidos, form). Applied to those scales of fishes 

 which have a regularly circular or elliptical outline with an even margin. 



CY-CLOS'TO-MI. Sometimes used to designate the Hag-fishes and Lampreys, 

 forming the order MarsipobrancTiii. 



CYST (Gr. kustis, a bladder or bag). A sac or vesicle. 



CYS'TIC. 



CYS'TI-CA. The embryonic forms (scolices) of certain intestinal worms (Tape- 

 worms), which were described as a distinct order, until their true nature 

 was discovered. 



CYS-TOI'DE-A (Gr. kustis, a bladder ; and eidos, form). An extinct order of 

 JSchinodermata. 



DE-CAP'O-DA (Gr. deJca, ten ; podes, feet). The division of Crustacea which 



have ten ambulatory feet; also the family of Cuttle-fishes, in which there 



are ten arms or cephalic processes. 

 DE-CID'U-OUS (Lat. decido, I fall off). Applied to parts which fall oif or are 



shed during the life of the animal. 

 DE-COL' LA-TED (Lat. decollo, I behead). Applied to univalve shells, the apex 



of which falls off in the course of growth. 

 DEI-NO-SAU'RI-A (Gr. deinos, terrible ; saura, lizard). An extinct order of 



Eeptiles. 

 DEN'DRI-FORM:, DEN-DRIT'IC, DEN'DROID (Gr. dendron, a tree). Branched like 



a tree, arborescent. 

 DEN'TAL. 

 DEN-TI-ROS'TRES (Lat. dens, a tooth ; rostrum, a beak). The group of Perching 



Birds in which the upper mandible of the beak has its lower margin toothed. 

 DER'MA. (See Cutis.) 



DER'MAL (Gr. derma, skin). Belonging to the integument. 

 DER-MO-SCLE'RITES (Gr. derma, skin ; skleros, hard). Masses of spicules which 



occur in the tissues of some of the Alcyonidce (Actinozoa). _ 

 DES-MID'!-^. Minute fresh- water pi ints, of a green color, without a siliceous 



epidermis. 

 DEU-TER-O-ZO'OIDS (Gr. deuteros, second; zocn, animal; eidos, form). The 



zooids which are produced by gemmation from zooids. 



