140 Platelminthes. — Turbellaria. 



))i 2. Convoluta cinerea v. Gkafk. Corpus 3 — .") inm lougum, latius et 

 crassius quam in C. paradoxa; dorso cinereo, facie ventrali all)ida; organa veneni- 

 fera apicibus curvatis; margines laterales iuvolubiles. 



Habit.: Xapoli, ^lessina (v. Ctrakf). 



3. C. paradoxa Okkst. (Monofxs pa^-adoxm Diks., C. alhicliicfa Scmi/rzE, 

 C. BicsiiKjii U. St H.M., C. iiifmiiJifmhuii 0. Schm., C. aniiafa v. (tkakk, C. SchiniiJfii 

 CzERN.). Corpus 2 — G mm lonjium, antice latum, rectuni, postice caudae instar 

 attenuatum et cellulis aggiutinantibus instructum; margines laterales inflexi; os 

 a margine anteriore quartam longitudinis corporis partem distans, vesicula otolithi 

 inter os et margineni anteriorem, oculi duo. Color flavo-viridescens aut flavido- 

 fuscus, sine pigmento nigro. (Zooxanthellae parasitae.) 



Distrib. : Maria Europae septenti-ionalis (Xorvegia, Scotia, Angiia, Helgo- 

 land ins.j, Mare balticum (^Kugia); pontus Euxinus. 



Habit.: Napoli (Metschnikoff) ; Messina (Grakk); Adria: Lesina, Corfu, 

 Cephalonia (O. Sch.midt). 



4. C. Schultzii O. Schm. (Mouofm Scliidfzii Dies.). Corpus 1 nini longum, 

 antice latum rotundatum, postice attenuatum, rotuiidatum maculis ruluis notatum: 

 margines laterales prorsus involubiles; oculi nulli (Zoochlorellae parasitae). \(tii- 

 rafor viridis Busch [Froporm viridis Lkt.], status juvenilis.) 



Distrib. : Roscoff"; Pontus Euxinus. 



Habit. : Napoli (JIetschnikokk); Adria: Ancona (M. S('Hi;i/r/E), Lesina 

 (0. Schmidt). 



B. Tribus Rhabdocoela v. Grff. 



Tubus intestinalis a parenchymate discretus in cavo corporis suspensus : 

 S3'stema nervosum at(iue organum excretorium adsunt; organa generationis herina- 

 phrodita (excepto genere il//rras/r>;»a et VS/n/o.s^>»/rf): testiculi giaiidulas duas com- 

 pactas, organa feminina ovaria aut organa ovo-vitellina aut ovigena et vitelligena 

 fonnantia, tunica propria a parenchymate discreta; pharynx vario modo fornuvtus: 

 otolithus plerumque nuUus. 



(1. Fam. JIACROSTOMIDAE Ed. \'an Hen. Orificia genitalia bina, femi- 

 neum aiitt' iniisculuin: ovaria, organa feminea accessoria nulla; pharynx simplex. 



Mecynostoma Ed. Van Den. Ofoliflnis adcsf: oraria hiiia . tcsticiili foJli- 

 Cidares; os rcnfnilr. inifr auf posf otolifhiiin positinii. 



*1. M. caudatum v. (trakf {Macrostoma cawlafum Ui.,i.). Corpus 1 mm 

 longum, cylindricum, antice rotundatum, postice dilatatum papillis adhaesivis mu- 

 nitum: })allid(' flavuni: i^ars anterior ciliis elongatis rigidis; os sub forma rimae 

 longitudinalis |taullo post otolithum. 



Hal)it.: Scbastopol, siiius, !) — 10 m prof. (Ul.ianin).) 



Macrostoma Ed. Van Ben. (Macrosfoma Oerst. p., Tnrhclla Dies. p.). 

 Ofolithns inilhis. oraria hiiia, tcsticidi compacfi, os ventralc post ganijlia cerchralia. 



*1. M. lineare Ui,.i. Corpus ^/4 — iV* min longum, anguste cylindratum. 

 antice et posticf aciiiialitcr rotundatum, extremitas posteiior jtapillis adliaesivis 

 niunita: os in anteriore (luarta jtarte corporis; oculi nulli: organuni copulationis 

 masculum tubum longum spiraliter contortum formans. 



Habit.: Sebastojx)!, sinus, inter plantas marinas (UiiJANiN). 



2. Fam. MICROSTOMIDAE O. Schm. Propagatio sexualis et non sexualis; 

 ovaria fere semper simplicia, organa accessoria $ nulla: pharynx simplex. 



Microstoma O. Scmm. Scrns discreti, fcsficnli compacti: cnrjms aci/nalifcr 

 ciliis Irrl/mi. jorrnlis rihranfihns ef sacco cacco 2>racocsitphajci> iii.sfrnctnm. 



