244 GLOSSARY OF TERMS. 



Nana. {Nanus, a dwarf,) This term is applied to the smallest 

 of the Taeniae (T. nana). 



Nematoid. (fiijfj^a, a thread, and eiBof, a resemblance.) A class 

 of entozoa, in which the long, filiform worms are included. 



OPHTnALMOBiiTM. ( '0(p6a\fio'}, the eye, and /3(dw, to live.) The 

 D. ophthalmobium is a small trematode worm which has 

 been observed in the interior of the eye. 



OxTURis. ( '0^v9, sharp, and ovpa, the tail.) A species of 

 nematoid worm, in which the body tapers off gradually at 

 the posterior portion. 



Paeamecium. (TLapa, amongst, /htjkwu, excrementitions matter.) 

 An infusorial worm, which is sometimes observed in the 

 evacuations, or in the contents of the colon. 



Pentastomtjm. (HeVre, five, arofia, the mouth.) The parasites 

 included in the genus Pentastomum have four cavities, into 

 which the hooks can be retracted, situated near the mouth, 

 so that they possess altogether five mouth-like openings, 

 from which peculiarity the name of the genus is derived. 



PoLTSTOMTJM. (EloXrs, many, and aro/xa.) Under the head of 

 Polystoma, or Polystomata, are included all the trematode 

 worms which are provided with more than two suckers. 



PoLTMOEPHirs. (no\v9, many, and fi.op(pi], shape.) Having 

 many forms, or shapes. 



Proscolex. (11/30, before, (tkwXtj^, a worm.) The phase of 

 development which immediately precedes the scoles. 



Protozoa (Uptoroi, first, ^wov, a living animal.) Under this 

 head are included the first, or simplest, forms of living 

 organization. 



E-OSTRUM. (Bostricm, a beak.) This term is applied to the 

 projection which exists upon the head, in some of the cestoid 

 worms. 



Scolex. C^kioXtj^, a worm.) This word is used to designate a 

 phase of development of the cestoid eutozoa. 



ScoLiciPARiENS. (S/cwX^f , and pmno, to bring forth.) A term 

 applied by Kiichenmeister to the HJcMnococcus Yeterinorum, 

 i. e., the Echinococcus found in animals, as distinguished 

 from the E. hominis, found in man, to which that writer has 

 givett the name E. altricipariens (from alter, another, and 

 pm'io, to bring forth). 



Serrata. (Serratus, notched.) The tcenia serrata, very common 

 in the small intestine of the dog, has a number of projec- 

 tions, resembling the teeth of a saw, arranged along its two 

 margins, whence this species derives its distinctive name. 



