£ 't 4- D i e s i n g-. 



tundi. Penis ovalis in iippendieem styliformem antice uncinatam 

 attenuatus. Longit. 3"'. 



Vortex caudatus Oersted: in Kroyer's Naturhist. Tidssk. I. (1844— 



1845), 416. 

 Habitaculum. Prope Dröbak inter algas (Oersted). 



50. Tarbella strigata. 



Mesostomum strigatum Oersted. — Dies. Syst. Helm. I. 222. 



51. Tarbella bistrigata. 



Mesostomum bistrigatum Oersted. — Dies. Syst. Helm. I. 223. 



52. Tarbella? stagni. 



Planaria stagni Dalyell: Powers of the Creator II. 118. Tab. XVI. 30. 

 Mesostomum? Leuckart: in Troschel's Arch. 1859. II. 183. 



Habitaculum. In Scotia (Dalyell). 



53. Tarbella Planaria. 



Distigma 1 ) Planaria Hempr. et Ehr. — Diesing : Syst. Helm. I. 187. 



54. Tarbella Proteus. 



Distigma Proteus Hempr. et Ehr. — Dies. Syst. Helm. I. 187 et 648. — 

 Bailey in Smithson. Contrib. II. 45. 



Habitaculo adde: Salem in Massachusetts (Co le). 



55. Tarbella viridis. 



Distigma viride Hempr. et Ehr. — Dies. Syst. Helm. I. 188 et 648. 



56. Tarbella Helluo. 



Distigma? Helluo Diesing: Syst. Helm. I. 188. 

 Vortex viridis Schnitze: Beitr. Turbell. 47 (solum in nota). 

 Planaria graminea Dalyell: Powers of the Creator II. 119 — 121. 

 Mesostomum viridatum? Leuckart: in Troschel's Arch. 1859. II. 183. 



Habitaculo adde: In Scotia (Dalyell). 



57. Tnrbella tenax. 



Distigma? tenax Hempr. et Ehr. Diesing: Syst. Helm. I. 188 et 648. 



XI. SPIROCLYTUS 0. SCHMIDT. 

 Macrostomi et Goniocarenae spec. Schmarda. 

 Corpus gracile ciliatum. Caput corpore continuum, ciliis rigidis 

 loni^is cristatum. Os ventrale circulare vel rimaeforme, antrorsum 



l ) Cfr. Stirapson Prodr. I 1 (de Iranslatione ad Rhabdocoela). 



