TEICHOCEPHALUS DISPAR. 323 



vagina laevi cylindricd instructus. Extremitas caudalis organo 

 copulatorio auxiliario, spinis armato, subcylindrico ornata, cujus 

 lonyitudo 0-451 mill = 0-198'" Par. = 0-203'" F, latitudo in 

 parte libera 0-090 mill. = 0-039'" Par. = 0-Q40"' F, in parte op. 

 posita fere 0'049 mill. = 0'0216'" P. = 0'022 /// F. est. Cloacae 

 communis musculosas in maribus longitudo circiter 4 mill. 2'" P. ; 

 latitudo 0-261 mill = 0-116'" P. = 0-119'" F ; latitudo foraminis 

 cloacae ipsius = (the lumen of the canal formed by the cloaca) 

 0-130 mill. = 0-058'" P. = 0'059'" F. Spermatozoidia globuli- 

 formia ad 50 mill, longa. 



Femina .- in trunco rectior, minus curvata, mare aliquid latior, 

 minusque elastica et flexibilis, obovulorum in utero et ovariis 

 copiam, eaque de causa colore magis fusca ; extremitate caudali 

 obtuso acuminata. 



Ovula fusca cum generis speciminibus ; 0'054 mill. = 0'022 //x 

 P. et F. longa; media in parte 0'025 mill. 0-0112 7 " P. et V., 

 in apicibus O'Ol mill. = 0'0048 /// P. et F. lata. Embryonum miora- 

 tioncs adhuc ignotce. VerisimiUimum est, Trichinas, quas dicerunt 

 spirales, Trichocephali disparts embryones esse. 



Description of Trichina spiralis .- corpus plerumque in spiras 2 re- 

 tortum, ad anum versus crassius et obrotundatum, ad caput attenu- 

 atum ; tubus intestinalis, uti apud Trichoc. disparem, ab initio 

 multifarie retortus, ventriculus pyriformis cum lateralibus 2 appen- 

 dicis alosis (lobulis aut glandulis aut nervis), intestinum rectum 

 post coarctationem quandam iterum incrassatum, rectdque via ad 

 anum in extremitate posterior e edque crassiore apertam profectum. 

 Funiculus quidam secundus in utraque extremitate ccecus et semi- 

 lunaris genitalium primordia format (?) 



Longit. vesicularum 0'2 0*5 0'7 7// = 0-4 1-0 1'5 mill. ; 

 latitudo fere mediam partem exhibet. 



Longitudo vermiculi ex cystide liberati et evoluti secundum, 

 Luschka J ^" ; secundum meas mensuras 1-115 mill. = 0*50 //x 

 P. = 0-518'' 7 F. ; latitudo in capitis apice 0-008 mill. = 0'0036 W 

 p. = 0-0037 r// F. ; latitudo extremitatis posterioris seu ani 0-024 

 m ill. = 0-0108 7 " P. = O-lll"' F 



The Trichocephalus dispar was first discovered by Morgagni in 

 the csecum and vermiform appendage of typhous patients, and is 

 mentioned in his ' Epistolse Anatomicse.' Subsequently, in the 

 year 1761, it was found by a student of Gottingen, who regarded 

 it as a young Ascaris lumbricoides, or a very large Oxyuris ver- 

 micularis, although Roederer and Wagler immediately recognised 



