100 ANIMAL PARASITES. 



Second Order — Tcenlca. 



Caput subglobosum aut tetragonum ; acetabulls-osadls suctoriis 4, 

 rarissime 6, muscularibus, orbicularibus, symmetries oppositis, valde 

 contractillbus ; rostello imperforate, retractili, in scollcibus quies- 

 centlbus inverso, in activis s. Tcenils maiuris propulso, hamulorum 

 simplici, duplici, aut multiplici corona armato ; corpore plerumque 

 albo, piano, depresso, bllaterale aut triquetro, articulato {strobila) ; 

 articulis maturis androgynis, aut non sexuallbus (?), sponte et alio 

 pout alium dehiscentibus, Trematode cuidam similibus [Proglottides) ; 

 systemate vasculoso perdaro ; poris genitalibus later alibus, plerumque 

 alternantibus, masculo tuajore et anteriore, femineo minore et pos- 

 teriore ; genitalibus perfectis. Scolices quiescentes et immaturi 

 formam cystl-, platy- aut a-cercam ineuntes. Scolices activi cum 

 strobila longiludine et latiludine valde variantes. Embryones 6 

 hamunculis armati, parvuli, pervivaces ; ovula in Mis qui formam 

 cysticercam ineunt, minima, pileata, flavescentia, in ceteris majora, 

 heviora et clariora. 



I. Tania> which occur in man in the mature state. 



1. Tcenia solium, and its scolex-nurse = Cystlcercus celluloses. 

 Tab. Ill, figs. 1—10, and Tab. IV, hooks iii. 



Taenia matura = Scolex activus cum strobila ; longlt. 4 — 5 

 metres = 6 — 8 ulnarum, latlt. ad 13 mllllm. Caput = scolex sensu 

 strictlore, breve, antrorsum planum, 0-56 — 075 — 1*0 mill, lat., 

 acetabulis validis, prominentibus OJ 92 — 23I /// =0*434 — 0-521 mill, 

 long., et 0-182— 224'"= 0-410— 0'505 mill. lat. ; rostello parvulo 

 0*4 mill, ad latera nigrescente ; hamulorum 22, 24, 28, 30, ple- 

 rumque 26, duplice or dine, longlt. 0-167 quoad majores, 0*11 mill., 

 quoad mlnores hamulos (secund. Leuckart), 0-18 et 0-12 secund. 

 meas mensuras, unque et stylo hamulorum ex longlt. fere similibus, 

 forma hamulorum omnino vastd ; loculis hamulorum perclarls, 

 nlgrescentlbus ; collo perparvo, fere nullo ; corpore antrorsum 

 maxime attenuato, deorsum ad 10 — 14 mill, lato, articulato, poris 

 genitalibus alternantibus, inter dum irregulariter ; utero ramls 6 — 

 10 — 13, irregulariter alternantibus, denuo ramificatis insiructo ; 



