Revision der Tuibellarien. 361 



1. Planocera (Jaimardi BLAINVILLE. — Dies. Syst. Helm. I. 217. 

 adde: 



Planoceros Gaimardi Ehrenberg : Acaleph. d. rothen Meeres 67. 



Planocera Gaimardi Stimpson Prodr. I. 5. 

 H a b i t a c u 1 u in. In itinere d'Urvillei legit : G a i m a r d. 

 In Lac spec'ie opsophagi limbus lobatus. 



2. Planocera elliptica GIRARD. ' 



Corpus ellipticum, marginibus integris, cinereo-flavum. Longit. 



ad 9"'. 



Planocera elliptica Girard : in Proceed. Amer. Assoc. Adv. Sc. 2 mee- 

 ting (1849) 398 (de evolul.). — Idem in Boston. Soe. nat. bist. III. 

 (1848— iSäl), 251 (descr. incompleta animalis) et ibid. 348 (de 

 pvolut.). — Idem: Researches upon Nemcrteans and Planarians I. 

 Pbiladelphia 18o4 c. tab. tribus. (de evolut.) — Stimjm»! : Prodr. I. S. 



Habi tac ul um. Ad littus Massachusetts frequens (Girard). 



3. Planocera nebnlosa GIRARD. 



Corpus ellipticum obscure hyalinum, suprii obscure adspersum, 

 Inde ciiiereum, vitta mediana obscure brunneo-rufa a basi tentacu- 

 loriim ad marginem corporis posticum usque exeuri-ente, siibtus 

 griseuni, antrorsum rubrotinctiim, marginibus hyalinis. Tentncula 

 alhida, protracta 1 '/o'" longa. Longit. 1/2", latit. 3'". 



Planocera nebulosa Girard: in Proceed. Acad. Philad. VI, 367. 



Habitacul u in. In limo arenoso prope Fort Johnston ad littus 

 Carolinae (Kürtz et Stimpson). 



4. Planocera reticulata DIESING. 



Corpus planum ovale, pellucidum, riiarginibus crenulato-undu- 

 latis, supra et siibtus pallide flavum v. isabelliniim reticulo pallide 

 brunneo insignituin et brunneo-maculatum. Tentaculn parum ante 

 corporis medium, brevia snbcylindrica. Os rimaeforme, oesophago. . . 

 Apertura genitalis ante os? Longit. 23/4", latit. 274" (secund. 

 iconem). 



Ovula, in spiras multas dense agglomeratas disposita, sub lapidibus depo- 

 sita. — Animalcula vivacia, natantia vel gliscentia. ' 



Planarideum Pease in Proceed. Zool. Soc. London 1860. 37. t. 70. 1. 2. 

 Peasia reticulata ./. E. Gray ibid. 



Habitaculii m. Ad littora insularum Sandvicensium (Pease). 



