Revision der Turbellarien. 561 



1. Planocera Gaimardi 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 m. In itinere d'ürvillei legit : G a i m a r d. 

 In hac spec'ie oesophagi limbus lobatus. 



2. Planocera clliptica GIRARD. 



Corpus eilipticum, rnarginibus iutegris, cinereo-flavum. Longit. 

 ad 9"'. 



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

 ting (1849) 398 (de evolut.). — Idcm in Boston. Soc. nat. bist. III. 

 (1848 — 1851), 251 (descr. incomple(a animalis) et ibid. 348 (de 

 evolut.). — Idem : Researcbes lipon Nemerteans and Planarians I. 

 Philadelphia 1854 c. tab. tribus. (de evolut.) — Stimpson: Prodr. I. 5. 



Habitaculum. Ad littus Massachusetts frequens (Girard). 



3. Planocera nebnlosa GIRARD. 



Corpus eilipticum obscure hyalinum, supra obscure adspersum, 

 inde cinereum, vitta mediana obscure brunneo-rufa a basi tentacu- 

 lonim ad marginem corporis posticum usque excurrente, subtus 

 ^riseun», antrorsum rubrotinctum, marginibus hyaiinis. Teniacula 

 albida, protracta X^/z"' longa. Longit. 1/2", latit. 3'". 



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



Habitaculum. In limo arenoso prope Fort Johnsfon ad littus 

 Carolinae (Kürtz et Stimpson). 



4. Planocera reticnlata DIESING. 



Corpus planum ovale, pellucidum, marginibus crenulato-undu- 

 latis, supra et subtus pallide flavum v. isabellinum reticuio pallide 

 brunneo insignitum et brunneo-maculatum. Teiitacula parum ante 

 corporis medium, brevia subcylindrica. Os rimaeforuie, oesophago. . . 

 Apertura genitalis ante os? Longit. 23/^", latit. 2^/4" (secund. 

 iconein). 



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

 sita. — Animalcula vivacia, natantia vel glisccntia. 



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

 Peasia reticulata J. E. Gray ibid. 



Habitaculum. Ad littora insularum Sandvicensiurn (Pease). 



