BRITISH MARINE TURBELLARIA. 



241 



Oersted 

 (21) 



r Leptoplana Urcebachcnsis, Oe. 



Length 4 lines. 



Body " antice obtuso, dein sen- 



sim angustiore." 

 Eyes arranged in an anterior 



linear clump, and a posterior 



triangular one of 7. 



Leptoplana atomata, 

 O. F. Miiller. 

 Length 3—4 lines. 

 Body "subovali, postice an- 

 gustiore. " 

 Eyes arranged in four clumps. 

 Those of the posterior ones 

 are the larger. 



With regard to the arrangement of the eyes, Jensen's specimens of 

 L. Droebackensis differ from Oersted's just as much or as little as does 

 L. atomata. Oersted does not mention a hard penis in Droebackensis, 

 although he describes it in L. atomata. Taking these facts into 

 account, it may, perhaps, be said that Oersted's and Jensen's specimens 

 have as much right to be classed in the same species as has Oersted's 

 L. atomata. 



For the future recognition of L. Droebackenses I quote Jensen's 

 diagnosis. 



Length 10 mm. Breadth 4 — 5 mm. Body slightly narrowed 

 posteriorly, rounded at both ends. Dorsal surface red with scattered 

 darker spots, and with a longitudinal area, down the centre of which 

 runs a broken white line. Ventral surface white. Four paired groups 

 of eyes. Anterior groups placed longitudinally, hinder group directed 

 outwards and backwards, composed of larger eye-specks. Mouth 

 subcentral. Penis styliform, hardened at its apex or for its whole 

 length. Vagina connected with the spermotheca by a long duct 

 provided with a moniliform series of dilatations (Jensen [49], pi. vii, 

 figs. 10—14). 



B. GOTYLEA. 



Family EURYLEPTID^E. 



Ootylea usually provided ivith marginal tentacles. Brain anterior, 

 behind the tentacles. Mouth just behind, rarely in front of the brain. 

 Pharynx directed forwards, cylindrical. Main-gut behind tke 

 pharyngeal sheath. Male copulatory organ simple, directed forward*, 

 placed just behind or beneath the sheath of the pharynx. A hard 

 stylet in tke penis. Female genital pore betwten tke penis and the 

 sucker. Eyes (1) in or round the tentacles ; (2) double cephalic 

 group, sometimes greatly elongated. 



