ENTOZOA. 191 
Sp. Oxyuris vermicularis, Ascaris vermicularis L., BREMSER Ueb. leb. Wiirm. 
Tab. 1. figs. 6—12; Der Mastwurm, Springwurm ; it lives in the large 
intestine of man (especially in children), and causes a very troublesome 
itching and occasionally various nervous symptoms. The male was first 
discovered by BREMSER in 1815, in aspecimen sent to him by SHMMERRING, 
(see 8. TH. v. S@mMMERRING’S Leben u. Verkehr mit seinen Zeitgenossen von 
R. Wacner. Leipsig, 1844. 1. s. 340) previously the much larger female 
alone was known, 
Tricocephalus GorzE. Body filiform, elongate anteriorly capil- 
lary, passing suddenly into the more ample posterior part. Male 
genital organ a simple spiculum, long, vaginate. 
Sp. Tricocephalus dispar Rup., BREMSER Ueb. leb. Wiirmer. Tab. I. figs. 1—5 ; 
this species has frequently been met with in the intestinal canal of man, 
especially in the cecum, first by MORGAGNI, afterwards by R@DERER, Xc., 
in bodies of persons dying of typhus (RoxiTansky Handb. d. path. Anat.) ; 
frequently in cholera-subjects in Italy by DELLE CHIAsE (Isis, 1843, 
P- 557): 
Trichosoma Rup. 
Comp. Rup. Entozoor. Synops. p. 13, DusJARDIN Ann. des Sc. nat. 2e 
Série, xx. 1843, Zoologie, p. 332, pl. 14. 
Genera: Thominx, Hucoleus, Calodiwm Dusarp. 
Filaria Muri. Body very long, filiform, subequal. Mouth 
orbicular. Male genital organ a long spiculum with a contorted 
accessory part. 
Sp. Filaria medinensis, Gordius medinensis L., Bremser Veb. leb. Wiirm. 
Tab. tv, fig. 1. Dracunculus, Vena medinensis, the hair-worm, guinea-worm, 
le dragonneau, &c. This worm lives in man under the skin in the cellular 
tissue, especially in the legs, and may attain a length of ten feet; male 
individuals of this species do not seem to have been observed hitherto. 
Sometimes this worm occasions severe pain ; it is met with in hot countries 
especially of the old world, less frequently in America, except in the 
island of Curagao, where it is endemic, although the worm-sickness does 
not always prevail there with the same intensity. See the still interesting 
notices of B. HussrM in the Vehr. van het’ Zeewwsch. Genootsch. 1. 1771, 
443—464. The thread-worm is viviparous, and the young differ in form 
from the mother. SeeJacopson and Dr BuarInviLiz in Ann. du Muséum, 
nouvelle Série 111. pp. 8o—85. 
Lnorhynchus Rup. Body round. Head without valve, with 
tubule of mouth emissile, smooth. (Doubtful genus.) 
Sp. Liorhynchus denticulatus Rup., Brems. Icon. Helm. Tab. v. figs. 1g—22 ; 
in the stomach of Murena anguilla. 
Chetracanthus Dins. Body annulate, posteriorly attenuate, an- 
teriorly armed with palmate or dentate spinules, which in the middle 
