220 Diesing. 



Intestinum conicum. 



Vortex conus Schmarda: Neue wirbell. Th. I. 1. 6. Tab. I. 6. 

 Habitaculum. In aquis stagnantibus sylvarum, San Juan del 

 Norte, in America centrali (Schmarda). 



* Os in medio vel paulum supra vel retro corporis medium situm. 



Mesostomum Duges. — Strongylostoma Oersted. — Mesopharyngis spec. et 

 Chonostomum Schmarda. 



26. Turbella fasiformis. 



Derostoma (Mesostoma) fusiforme Duges. — Ehrenberg : Akaleph. des 



rothen Meeres 66. 

 Mesostomum fusiforme Buges- — Diesing : Syst. Helm. I. 222. 

 Strongylostoma assimile Oersted. — Schnitze: Beitr. Turbellar. 53. 

 Habitaculum. In aquis stagnantibus Galliae (Duges); — in 

 Dania (Oersted). 



27. Turbella radiata. 



Mesostomum radiatum Diesing: Syst. Helm. I. 222. 

 Strongylostoma radiatum Schnitze: Beitr. Turbellar. 53. 



Habitaculum. In Daniae aquis paludosis et piscinis (Müller 



et Oersted). 



28. Turbella rostrata. 



Derostoma (Mesostoma) rostratum Duges. — Ehrenberg: Akaleph. des 

 rothen Meeres 66. 



Mesostomum rostratum Duges. — Diesing: Syst. Helm. I. 220. — 

 Schätze: Beitr. Turbell. I. 73-74. Tab. I. 10—12, 23 (anatom. et 

 de corp. bacill.). — Schmarda: Neue wirbell. Th. I. 1. 10. 

 Habitaculo adde: Prope Badulla in Ceylonia (Schmarda). 



29. Turbella Ehrenbergii. 



Os in calycem s. reeeptaculum vasorum aquiferorum excurrens. 

 Planaria tetragona var. Ehrenberg: Akaleph. d. roth. Meeres 66. 

 Mesostomum Ehrenbergi Oersted. — Diesing : Syst. Helm. I. 220. — 



Leuckart: inTroschel's Arch. 1852. I. 234 (anatom.). 

 Mesostomum Ehrenbergii O. Schmidt: in Sitzungsb. d. kais. Akad. XXV. 

 87, 88 et in Denkschr. XV. 32 et 46. Tab. III. 34 (anatom. cum 

 notit. biograph.). 

 Habitaculo adde : Prope Cracoviam frequenter (O. S c b m i d t). 



30. Turbella Lingua. 



Mesostomum Lingua Schmidt. — Diesing: Syst. Helm. I. 221. 

 Habitaculum. Prope Axien ad Albim , Aprili et Junio 

 (0. Schmidt). 



