Revision der Turbellarien. 



265 



•{• f Proboscis terminalis e margine capitis pro'cractilis. 

 XLVII. POLINA STBIPSON^). 



Poliae spec. Stimpson. 



Corpus valde contractile depressiiisculum. Caput discretum vel 

 subdiscretiim. Proboscis terminalis laevis, ex apertiira in margine 

 frontali inferiore sita protractilis. Os . . . . Ocelli plurimi in acervos 

 quatuor aggregati. Sexus et anus .... Oceani indici et atlantici 

 incolae. 



1. Polina rhomboldalls STIMPSON. 



Corpus depressiuscu^um, antrorsum latius, pallide rubram, fas- 

 ciis duabus longitiidinalibus inconspieuis. Caput parvum, stibdiscre- 

 tum, breve, antice rotundatnm. Ocelli quatuor in singulo acervo, in 

 rhonibum disposili; acervi posteriores minores macuüs obscuriori- 

 bus impositi. Longit. 1", latit. vix 1/2'". 



Polia rhüiiiboidalis Stimpson: in Proceed. Acad. Philad. VII. 390. 

 Polina rhomboidalis Stimpson: Prodr. II. 21. 



Habi tacuiuni. Lilturalis sub lapidibus in portu Jacksoni Äu- 

 straüae (Stimpson). 



2. Polina grlsea STIMPSON. 



Corpus longum depressiusculum, sub extensione subcylindrieum, 

 pallide giisenm. Caput discretum, ovatum v. subcordatum, corpore 

 angustius, anlice acutum. Ocellorum acervi anteriores majores, elon- 

 gati, in parte anteriore laterali capitis submarginaliter dispositi, 

 ocellis in utroqiie acervo decem; acervi posteriores cervicales parvi 

 lineares, ocellis in utroqne quatuor. Longit. ad 1", latit. i/a'"- 

 Polia giisea Stimpson: Proceed. Acad, Philad. Vil. 390. 

 Polina grisea Stimpson: Prodr. II. 21. 



Habitaculum. Subliltoralis inter JJlvas in locis iimosis, in 

 portu Virginiano „Norfolk" (Stimpson). 



3. Polina cerTicalis STIMPSON. 



Corpus gracile cervice angustatum, supra salmoneo-rubrum. 

 6^apM^ discretum late rboniboidale, antice obtusum et /emarginatum. 

 Ocelli niinuti, in acervos quatuor confluentes aggregati; anteriores 



i) Animalcula a cl. Gaimard in Voyage en Scandinavie ele. Zool. Tab. C. 23—29 

 depicta fortasse huic geiieri pi'oxiraa. 



