I. TURBEILARIA. 



A. PROCTUCHA, Max Schultze. 

 Animalia ano stipata^ sexu cliscreta. 



Rhyncocoela, M. Sch. (Nemertinea, Stimpson, Keferstein.) 



Tubus cibarhis probosciile praeditvs tiibiilosa, exsertili, ahintesti- 

 110 sejuneta, interdiim armata. 



Enopla, Keferstein. Proboscide armata. 



Familia unica 



TRAEMACEPHALIDAE^ Kfrst. Cwput fissuris bremhtis transver- 

 sis respiratoriis instructum. 



Tetrastemma, H. & Ehbg. Gorpiis teretmsctdum, p)a'tittulum 

 depressKin. Caput continuicm I. subdiscretum; fovea transversa, in me- 

 dio utriusque lateris (fissurae respiratoriae) ; fronte truncata; apei'ttira 

 prohoscidis in rima transversa, terminali. Anus terminalis. Ocelli jr 

 Maricolae. 



T. obseiiruni, M. Sch. Corpus fere cylindricum; antrorsum 

 aliquantum attemiatum; utrinqiie truncatum, olivaceum. Oeuli jv — vj. 

 Proboscis (oesophagus) stylo uno mediano armata, sacGulisque ij stylife- 

 ris latercdibus, stylis binis. Long. 14 millim.; latit. 1 — l,o m. m.. 



Synon. Tetrastemma obscurum. Max Schiiltze pag. 62: idem in 



museo zoologico Kieliae Holsatomm. 

 Polia obscura, Yan Beneden, p. 23 



Tetrastemma varicolor y olivaceum, G. .Johnston p. 20 f^)] non- 

 dum vero Oersted c& Diesing. 



Habitat sub lapidibus lignisqve submersis 1 in fucis aliis- 

 que plantis; passim frequens. — Helsingfors, Abo (Runsala). 



Obs. Tlie description and figures of the internal organs 

 given by Van Beneden, as also those given by Max Schultze, 

 quite accord to my observations; but Van Beneden represents 

 the animal threadlike and designs the length to be 5 — 6 centim. 

 and the breath 2 m, m. — I have seen specimens with 3, 4, 

 5 and 6 eyes. 



B. APROCTA, M. Sch. 



Auimalia ano destituta, androgyua; caput fissuris carens, 

 DEXDROCOELA, Ehbg. Oesophagus tnusettlosus, protractilis, pe- 

 ristomio interdum lobcdo; tractus intestinalis dendritice ramosus; corpus 

 depressum I. plartuni. 



