ECHINOCOCCUS ALTRICIPARIENS. 205 



b. EciIINOCOCCUS ALTRICIPARIENS = EcHlNOCOCCUS HOMINIS 



autorum. 

 (PL III, figs. 18 a— g, 19, and PL IV, fig. 10 a— e.) 



Synonyma. — In the confusion which prevails, it is no wonder 

 that this species lias been everywhere mixed up with the pre- 

 ceding one ; compare, therefore, the preceding species. 



Taenia matura : Hucusque ignota. 



Scolex = Echinococcus altricipariens : seu E. hominis (aidor.) 

 Vesica animata Echinococco scoliciparienti similis, sed omnino eo 

 multo major (ad \ ped. in diametr.) Scolices singuli quiescentes 

 majore hamulorum minorum numero (46, 52 et ultra) armati 

 parantur a, aut ex modo E. scoliciparientis; |3, aut in gemmis 

 aut capsulis a vesica matris superficie interna solutis, in quibus 

 iterum scolices et vesica secundaria scolices gignendi si pradila 

 gignuntur (mother-, daughter-, and granddaughter-vesicles); y, aut 

 fortasse in vesicis, qua divisione quadam aut sectione ex vesica matre 

 in vasibus animalis hospitis repente et serpente formantur. Vesica 

 mater nihil aliud est nisi vesicula embryonalis G hamulis armata 

 et valde amplificata ; vesicula filia et neptis hamulis 6 destituta, 

 quia ex vesicula embryonaU recta via non exorta sunt. 



Habitat : Non solum in homine, sed etiam, autoribus Haubnero 

 et Creplino, in mammalibus majoribus domesticis, et quidem in 

 diversissimis et hominis et illorum animalium corporis regionibus. 



Ovula : Hucusque ignota. 



Tania matura. — I should not wander far from the truth if I 

 were to assert that this Tania may probably occur in the human 

 intestines, and indeed in the intestines of those individuals who 

 suffer, or have suffered from the species of Echinococcus belonging 

 to it in some part of their bodies, and in whom such a colony of 

 Echinococcus has opened towards the intestine. Perhaps, as I 

 have already said, the Tania nana of Bilharz and Yon Siebold 

 had such an origin, and was a Tania Echinococcus altricipariens. 

 This Tania may also be enabled to develop itself in the intestines 

 of domestic carnivorous animals, especially dogs and cats, as well 

 as in man ; and I shall presently, in considering the circumstances 

 of Iceland, endeavour to show how these animals may acquire 



