OXYURIS VERMTCULAEIS. 357 



penis is completely and essentially distinguished by its small size 

 and its form, from the penis of the Ascarides, which is usually 

 double. 



Having thus justified ourselves with regard to the name and 

 position of the worm in the system, we may pass to the closer 

 examination of the worm. 



Corpus album ; cutis transverse striata, in margine utroque 

 cum duplice ordine dentium acutiorum et obtusiorum secundum. 

 Dujardini mensuras 0*018 — 0023 mill., secundum meas in feminis 

 00.24— 0-030 mill. = 0-0108— 001 4'" P. = 0011— 0*015'" V., 

 in maribus autem 0-008 mill. = 0*0036'" P. = 00037'" V., inter se 

 distantium; caput 2 appendicibus lateralibus, vesiculosis epidermidis 

 duplicaturd ; os rotundum, antice margine trilabiatum et angustum, 

 oesophagus carnosus, musculis longitudinalibus et transversis, canali 

 triquetro ; ventriculus strictura ; cesophago sejunctus, globosus, 

 cum cavitate interna triquetra, et valvularum apparatu ; epithelio 

 polyedrico cum nodulo pellucido sparsim instructus. 



Mas : 2-05 mill. = 0*90'" P. = 0-95'" V. ad 2*5 mill, ad 337 mill. 

 longus {si caudam semper curvatam tanquam lined recta extensam 

 mensus es) ; in capite una cum appendicibus 0*094 mill. = 0-011'" P. 

 = 0-0-12 /// V., sine appendicibus 0024 wi//;=0 0108 /// i^O-011"' 

 V., medio in corpore 0-123 mill. = 0-05 if" P. = 0-055'" V., in 

 cauda 0-023 mill. = 00144'" P. = 0-0148'" V. latus. (Esopha- 

 gus a 0024 mill. = 0-0108"' P. = 0-01 1'" V. ad 0-041 mill. 

 = 0-0108'" P. = 0-011 V. ad 0-041 mill. = 0-018 w P. = 0-0185"' 

 V. latitudinis intumidus est circiter 0-311 mill. = 0-137"' P. 

 = 141"' V. longus. CEsophagum sequitur brevis tubi intesti- 

 nalis strictura 0-008 mill. = 00036'" P. = 0-0037'" V. longa et 

 0-016 mill. = 0-0072'" P. = 0-0074'" V. lata. Postea sequitur 

 ventriculus ; 0-115 mill. = 0-050'" P. = 0-052'" V. longus et 

 0-065 mill. = 0-0288"' P. = 0-0296'" V. latus cum valvularum 

 apparatu cognito ; tubus intestinalis paulo post ventriculum lati- 

 tudinis 005 7 mill. = 0-025'" P. = 0-026'" V. est, ad anum vero 

 0-008 mill. = 0-0036'" P. = 0-0037"' V. Penis simplex 0057 

 mill. = 0-025'" P. = 026'" V. longus, ad basin 0*008 mill. 

 = - 0036'" P. = 0*0037" V., in apice vero semper ad hamuli 

 instar recurvato, latitudinis (adultinum 0*003 mill. = 0*001'" P. 

 et V). Funiculus spermaticus et testis simplex ; spermatozoidia 

 epitheliorum imaginem simulantia. Cauda apex in foveam 

 suctoriam mutabilis. 



Femina : 784 ex aliis ad 10 mil/.= 348, ex aliis ad'l-%37'" P.= 



