GLOSSARY. 375 



Crk-pus'cu-lar (Lat. crepnscvlum^ dusk). Applied to animals which are 

 active in the dusk or twilight. 



Cri-noi'de-a (Gr. ^W«on, a lily ; eidoft, form). An order of E(-'7iinod(?r-mata^ 

 comprising forms which are usually stalked, and sometimes resemble lilies 

 in shape. 



Croc-o-dil'ia ''Gr. krohodeilos^ a crocodile). An order of Reptiles. 



Crop. A partial dilatation of tlie gullet, technically called '' mgluvies." 



CrtjS-ta'ce-a (Lat. a-usta, 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. beis, a comb ; kustis, a bag or cyst). The sense-organ (prob- 

 ably auditory) which occurs in the Ctcnophora. 



CrE'Noin (Gr. kteh, a comb ; eidns, form). Applied to those scales of fishes, 

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

 jections. 



Cte-noph'o-ra (Gr. kteis^ a comb ; and jt?7/cro, I carry). An order of Adinozoa^ 

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

 bands of cilia arranged in comb-like plates. 



Cur-so'res (Lat. citrro^ I run). An orcler of Av^s^ comprising birds destitute 

 of the power of Uight, but formed for running vigorously (e. <;., the Ostrich 

 and Emeu). 



Cus'pi-DATE. Furnished with small pointed eminences or " cusps." 



Cu'ti-cle (Lat. cutkula^ 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 c^ttis vera, the coriuin, or the derm,a. 



Cy'cloid (Gr. kitHos, a circle; eidos, fonn). Applied to those scales of fishes 

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



Ct-clos'to-mi. Sometimes used to designate the Hag-fishes and Lampreys, 

 forming the order MorsipolrancMi. 



Cyst (Gr. kvstis, a bladder or bag). A sac or vesicle. 



Cys'tic. 



Cys'ti-ca. The embryonic forms (scolices) of certain intestinal wonns (Tape- 

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

 ^vas discovered. 



Cys-toi'de-a (Gr. kvstis, a bladder; and eidos, foiTu). An extinct order of 

 A'c/iinodermaia. 



De-cap'o-da (Gr. deka, 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 ceplialio processes. 

 De-cid'o-ous (Lat. decido, I fall off). Applied to parts which fall off oi- are 



shed during the life of the animal. 

 De-col' LA-TED (Lat. decoUo, I behead). Applied to univalve shells, the apex 



of which falls off in the course of growth. 

 Dei-no- sau'ei-a (Gr. deinos, terrible; saura, lizard). An extinct order of 



Eeptiles. 

 Den'dri-foe3I, Den-dkit'ic, Dendroid (Gr. dendron, a tree). Branched like 



a tree, arborescent. 

 Den'tal. 

 Den-ti-ros'tees (Lat. (fens,atooth; ro.«<c«m,abeak). The group of Perching 



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

 Dek'ma. (See Cutis.) 



Der'mal (Gr. derma, skin). Belonging to the integument. 

 Der-mo-sole'rites (Gr. derma, skin ; sUf.ros, hard). Masses of spicules which 



occur in the tissues of some of the AJoijoindcn ( Actin^'zoa-t. 

 Des-mid'i-^. Minute fresh-water pi mts, of a green color, without a siliceous 



epidermis. , . , ■ , i- i m, 



Deu-ter-o-zo'oids (Gr. deuteros, second; zo^'n, animal; eidos, form), ihe 

 zoiiids which are produced by gemmation from zocids. 



