Plagiostomidae. — Mouotidae. 147 



4. Subfam. CylindrosLomina v. Ctraff. Os veiitrale, pliaryux plerumque 

 cyliudricus, autrorsum aut retrursum directus; orgaua l)iua ovi-vitelligeua ; oriticium 

 geuitale singulum, interdum apertura secunda bursae seminalis adest: sulcus auuu- 

 laris vibrans aut foveolae vil)rautes. 



Cylindrostoma Oekst. Xotae snhfamUiae efiaiii (jeiierin suiif. 



*[1. C. quadrioculatum Jexs. {Voiiex qnadriocuJafa R. Lckt., Psemlo- 

 sfomum faeroeiisc O. Scu.m.). 1 nun lougum, sine colore, orificiis geuitalibus 

 duobus. 



Distrib. : Atlanticum, litora Xorvegiae, Magnae Britanniae: Pontus 

 Euxiuus.) 



m 2. C. Klostermanni Jexs. (Tarbella K/osfermuinii v. Ctraff-). Corpus ad 

 1,5 mni longum, antice late rotundatum, postice cauda parva: foveolae vibrantes 

 in regione cerebri; cutis granulis luteis repleta et corpusculis calcareis praedita; 

 pharj^ux longus cylindricus, antrorsum apertus ; * ocelli 4 nigri, cerebro Iiaud qua- 

 drato impositi. 



Habit.: Xapoli, ]\Iessina (v. Ctraff); Adria: Trieste (v. Ctraff). 



2. Fam. MOXOTIDAE v. Ctraff. C^riticia genitalia bina, bursa semiualis, 

 organa ovigeua biua et vitelligeua bina ab eis discreta; vesiculae testiculorum 

 confertae inter cerebrum et pharyngem; pharynx longus plicatus retrorsum directus: 

 otolithus singulus. Corpus elongatum, depressum, autice atteuuatum, postice latius 

 cellulis adliaesivis munitum. 



Monotus DiEs., V. Ctk. [Monops et Cefidofis p. Dies., Monoeelis aut. p., 

 Bdeffonra Leidy p.). Orificium ifenifafe femineum anfe mascidnm. 



1. M. lineatus v. Gr. {Pfanaria fineafa 0. F. M., Monoeefis fiiteafa Oerst., 

 Monofiis rufilans Ehbc;., Monops rfegans. obesus Dies., 3Ionocefis af/ilis M. Schltze., 

 M. Ffnsfrae E. Lckt., M. protraefifis v. Ctraff, M. fruneafus et candafus Ulj.). 

 Corpus 2 — o mm longum, liueare, postice paullo latius, hyalinum brunneo tinctum; 

 otolithus prominentiis duabus; ocellus singulus maguus semilunaris uiger, ante 

 otolithum; penis mollis, papillosus. 



Distrib.: Atlanticum septentriouale, Balticum, Madeira; Pontus Euxinus. 

 Habit.: Xapoli, Messina (v. Graff); Adria: Trieste (v. CiRAFF). 



2. M. bipunctatus v. Cte. {Monocefis bipunefata Leydig, Monocefis anguiUa 

 O. ScHM., Monoeefis foni/iceps Dro.). Corpus 3 — 4 mm longum, sine colore aut 

 glaucum, macula latericia aut opaca prope extremitatem anteriorem interdum no- 

 tatum; pars posterior papillis adhaesivis munita: in utroque latere otolithi ocellus 

 parvus latericius aut niger. 



Distrib.: Madeira, Poiitus Euxinus. 



Habit. : Litora mediterranea Galliae (DuGi:s); Crenova (Leydig): X^apoli 

 (0. ScHMiDT, V. C^raff); Adria : Trieste (v. Geaff). 



Automolos V. Ctraff. {Monoccfis aut. p., Monotiis Dies. p.). Orifeinm 

 genitale femineum post mascufum sifuin. 



*{1. Au. unipunctatus v. Ctr. [Monocelis ^niipnnefafa Oerst.J. Ocellus 

 deest; penis tubulosus chitinaceus, spinulis confertis instructus. 



Distrib.: Atlanticum septentrionale, Balticum, Madeira. — Poutus Euxinus.) 



m 2. Au. ophiocephalus v. Ctr. {Monoecfis opliiocephafa 0. Schm.). Corpus 

 gracile, tenue, sine colore, pars antica coustrictioue distincta; ad partem con- 

 strictam otolithus, ante eum macula ocelliformis rubra; oviductus duo iu ductum 

 communem juncti ad oriticium femineum prope extremitatem posteriorem percurruut. 



Habit. : Adria: Corfu (0. Schmidt). 



10* 



