Vorticidae. — Plagiostomidae. 145 



Habit.: In plantis marinis (Ulvis): Napoli (v. (traff); Adria: Trieste 



(v. CtEAFF). 



(?2. S. pulchellus v. Gk. [rroscncephalus jJuk-heUns Ui>.i.]. In Ponto prope 

 Sebastopol [Ul.jaxin].) 



C. Tribus AUoiocoela v. Gbaff. 



Tubus intestinalis a parencliyniate discretus, cavum corporis parenchymatis 

 incremento diminutum; systema nervosum et excretorium adsunt; organa genitalia 

 liermaplirodita, lacunis parenchymatis inserta; penis simplex, partibus chitinaceis 

 nullis aut parvis; pharynx variabilis aut plicatus; intestinum lobatum aut sacciforme. 



1. Fam. PLAGrlOSTOMIDAE v. Ctraff. Orificium genitale singulum, or- 

 gana feminea auxiliaria desunt (excepto^ CijlindrostotHa) , organis femineis varia 

 forma paribus, testiculis folliculosis sparsis; pharynx variabilis; otolithi desunt. 

 Plerumque formae teretes aut plano-convexae, parte posteriore attenuata cellulis 

 adliaesivis raris niunita. 



(1. Subfam. Acmostomina v. Gb. Apertura genitalis in extremitate po- 

 steriore, ovaria duo; os in extremitate antica; pharynx perparvus, fere globularis. 

 — Gen. Acmostoma v. Gr.) 



2. Sitbtam. PLAGIOSTOMIXA v. Grapf. Apertura genitalis ventralis 

 prope extremitatem posteriorem, organa ovigena bina, vitelligena ab eis discreta 

 bina elongata; pliarynx bene formatus in dimidio corporis anteriore, oriiicio an- 

 trorsum directo. 



Plagiostoma (0. Schm.) v. Gr. Sine tentaculis in anteriore ohtuse rotundata 

 extrentitate eorporis. 



in 1. PL sulphureum v. Gr. Foveolae vibrantes desunt; oculi duo reni- 

 formes; os et plmrynx pone cerebrum oculosque; color sulphureus bacillis confertis 

 in cttte, pigmentum reticulatum nullum; corpus 1 — 2,5 mm longum, medio latis- 

 simum, postice acute attenuatum. 



Habit. : Inter Ulvas natans: Adria: Trieste (v. Graff). 



2. PL maculatum v. Gr. Foveolis vibrantibus praeditum; corpus statu 

 extenso ad 3 mm longum, gracile, lacteum, macula majore latericia et minore 

 ante alteram sita nigra notatum; extremitas anterior sagittata; extremitas postica 

 papillis adhaesivis munita. 



D i s t r i b. : Puerto-Orotava. 



Habit. : Inter Ulvas: Napoli (v. Graff); Adria: Trieste (v. Graff). 



m 3. Pl. reticulatum v. Gr. (Vortex reticukitus 0. Schm., Turbella reti- 

 cidata DiES.). Foveolae vibrantes desunt; oculi duo; os et pharynx pone cerebruni 

 et oculos; cutis sine colore, color in parenchymate maculis duabus dorsalibus, 

 stria sine colore separatis dispositus, sepiaceus aut cerasinus; cutis setis liic illic 

 munita. Longit. paullo 1 mm superans, corpus teres. 



Habit. : Napoli (0. Schmidt, v. Graff), Messina (v. Graff); Adria: Trieste 

 (v. Graff), Lesina (0. Schmidt). 



m 4. PL siphonophorum v. Gr. (Orthostomum. siphonophorum. 0. Schm., 

 Macrostomum siphonophorum Schmarda, Turbella siphonoyhora Dies.). Foveolae 

 vibrantes nullae; oculi duo; os et pharyux pone cerebrum oculosque; cutis sine 

 colore , parencliyma pigmento reticulato nigro striam longitudinalem formante 

 tinctum. Longit. 1 mm (fere 5 mm 0. Schmidt). Corpus gracile, antice trun- 

 catum, angulis rotundatis. 



Habit. : Adria: Trieste (v. Graff), Lesina (0. Schmidt). 



m 5. PL Girardi v. Gr. {Vodex Girardi 0. Schm.). Foveolae vibrantes 



Carus, Fauna meditenanea. I. 10 



