464 GLOSSARY. 



CRANIUM, the skull. Gr. kranion. 



CREPUSCULA'RIA, a term applied to the Hawk-moths and other 

 lepidopterous insects that fly in the twilight. Lat. crepus- 

 culum, twilight. 

 CRINOID, a family of Star-fishes which have a resemblance to 



the form of a lily. Gr. krinon, a lily, and eidos, form. 

 CRUSTACEA, the class of articulated animals which includes the 

 Crah, Lobster, and others possessed of a similar covering. 

 Lat. crusta, a shell or hard covering. 



CTENOID, a term applied to a group of fishes which have the 

 edges of the scales shaped like the teeth of a comb, as in the 

 Perch. Gr. kteis, ktenos, a comb, and eidos, form. 

 CYCLOBRANCHIA'TA, an order of molluscous animals of the class 

 Gasteropoda, distinguished by having the gills placed round 

 the lower edge of the body, as in the limpet. Gr. kyklos, a 

 circle, and branchice, gills. 



CYCLOID, a term applied to a group of fishes which have the 

 scales with circular or smooth edges, like those of the Her- 

 ring. Gr. kyklos, a curve, and eidos, form. 

 CYCLOS'TOMI, an order of cartilaginous fishes, which, like the 

 Lampreys, have a circular mouth capable of acting as a 

 sucker. Gr. kyldos, a circle, and stoma, a mouth. 

 CYSTIC ENTOZOON, an internal parasite resembling a delicate 



cyst or bladder. Gr. kystis, a bladder. 



DECAPITATION, the act of beheading. Lat. decapjtare, to behead. 

 DECA'PODA, that division of the Crustacea which includes the 

 Crab, Lobster, Crawfish, and others having ten feet. Gr. 

 deka, ten, and pous, a foot. 



DEGLUTITION, the act of swallowing. Lat. glutio, I swallow. 

 DENTINE, the bony substance forming the principal component 



of the teeth. Lat. dens, a tooth. 

 DIBRANCHIA'TA, a numerous family of Cuttle-fish (cephalopoda) 



comprising all species which are furnished with two gills. 

 DIP'TERA, an order of insects composed of two-winged Flies, 



Gr. dis, two, pteron, a wing. 

 DIUR'NA, a term applied to lepidopterous insects which fly by 



day, as Butterflies. Lat. diurnus, belonging to the day. 

 DORSAL, belonging to the back. Lat. dor sum, the back. 

 DORSIBRANCHIA'TA, a tribe of Annelids which have the gills 

 placed on the back. Lat. dor sum, the back, branchice, gills. 

 ECHINODER'MATA, one of the orders of radiated animals: it 

 includes the Star-fishes and Sea-Urchins. The term is 

 expressive of the appearance of their integument. Gr. 

 echinos, a hedge-hog ; and derma, a skin or covering. 

 EDENTA'TA, an order of mammalia, which comprises the Sloth 

 and Ant-eater, animals which are either destitute of teeth, 

 or have no incisors or cutting teeth. Lat. edentatus, without 

 teeth. 

 EFFETE, barren, worn out. Lat. e/oetus, or effetus, decayed, 



past work. 



ELY'TRA, the sheaths or wing-covers of coleopterous insects 

 (Beetles). Gr. elytron, a sheath. 



