242 GLOSSARY OF TERMS. 



wliicli is able, by the aid of its buccal apparatus, to penetrate 

 the integuments of certain animals. 



CERCOMOiirAS. (Ke'/9Kos, and /nova9, a single point.) This is a 

 minute animalcule, which differs from the ononas, in the 

 circumstance of its possessing a caudal prolongation. 



Cestoidea.. (KcffTos, shaped like a flat band, and e?oo?, a resem- 

 blance.) An important class of the entozoa, in which the 

 long ribbon-like worms are included. 



CffiNUBUs. (Koti/os, common, and ovpa, a tail.) A genus of 

 cestoid worm, characterised by a vesicle, common to several 

 bodies, each of which is terminated by a head provided with 

 four suckers, above which is arranged a double crown of 

 booklets. Tliis genus is peculiar to herbivorous animals. 



Ceassicollis. {Grassus, thick, and collum, the neck.) A 

 species of Taenia, T. crassicoUis, is found in the cat and 

 other feline animals. 



CucuEBiTiNUS. {Cmurhita, a gourd.) The rings of the tsenia 

 have some resemblance to the seeds of the gourd, and con- 

 sequently received the name of ciicurbitini from the older 

 writers. 



Ctsticeecus. (Kwst<9, a bladder, and kc/jko^, a tail.) A genus 

 of the cestoid entozoa, remarkable for the caudal vesicle 

 which the worms in this genus possess. 



Dacttlius. (AuKTwXtos, a ring.) A genus of the nematoid 

 worms. 



Denticola. {Dens; genitive dentis, a tooth, and colo, to in- 

 habit.) An infusorial parasite, which lives in the matter 

 which collects about the teeth. 



DiBOTHEius. (A«s, twice, and fioOpiov, a groove.) Another name 

 for the Bothriocephalus. 



DiCTSTUs. (Ats, and kvotis, a bladder.) A variety of Cysti- 

 cercus, consisting of two vesicles. 



Diqenesis. (At?, and <^eveai's, origin.) The transition through 

 two distinct stages of development. 



DiSTOMTJM. (At?, and arofia, a mouth.) The entozoa in the 

 genus Distomum possess two mouths, or suckers. 



Dbaounculus. (Dracunculus, the diminitive of draco, a serpent.) 

 One of the former names of the Gruinea-worm. 



EcHiNococcus. ('Extfos, bcset with prickles, and kokko^, a 

 berry.) A species of immature tsenia. 



Entozoa. ('Ei/to?, within, and ^wof, an animal.) Animals 

 which live within the organs of other animals. 



