BY J. J. FLETCHER AND A. G. HAMILTON. 361 



GEOPLANA (altered from Stimpson). 

 " Corpus depressum, vel depressiusculum, elongatum vel lineare, 

 capite contiuuo. Ocelli numerosi, marginales, vel submarginales ; 

 vel in parte anteriori corporis solum, vel passim circa corpus, 

 singulatim plerumque, nonnunquam in acervos dispositi" (1). 



1. Geoplana Tasmaniana, Darwin. 



Planaria Tasmaniana, Darwin, Ann. Mag. Nat. Hist., 1844, 

 XIV, p. 246 ; Geojilana Tasmaniana, Schultze I.e. p. 7 ; G. Tas- 

 inaniana, Moseley. I.e. p. 289. 



" Mouth-sucker widely extensile : alimentary orifice [)laced 

 neai'ly in centre of the body ; genital orifice /„ inch posteriorly, but 

 when the animal crawls it is f^j inch distant. Genital orifice very 

 distinct submar2;ined. Ocelli scattered round the entire margin of 

 the foot, but most frequent at the anterior extremity. Both 

 extremities pointed. Colour dirty honey-yellow with a central dark 

 brown line bordered on each side with a broader line of j)ale 

 uraber-brown : foot quite white. Length when crawling Ifg, when 

 contracted ^^ inch." 



Bab. — Beneath decayed trees in the woods of Yan Diemen's 

 Land : frequent in February (Darwin). 



2. Geoplana c^rulea, Moseley. 



(Plate v, fig. 1). 

 Ccenoplana ccBviolea, Moseley, Quart. Jour. Micro. Sc. 1877, 

 p. 285. 



(1) Gulliver, Phil. Trans. Vol. 168, p. 562. 



The following is Mr. Moseley's definition of the genus Ccenoplana : — 

 " Body long and wormdike, much rounded on the back, flattened on the 

 under surface, witlmut an ambulacral line ; external longitudinal muscular 

 bundles largely and evenly developed over both dorsal and ventral regions ; 

 lateral organs as in Rhynchodemus ; eyes absent from the front of the 

 anterior extremity, but present in two lateral elongate crowded patches 

 placed just behind the anterior extremity, and scattered sparsely on the 

 lateral margins of the body for its entire extent ; mouth nearly central, 

 pharynx cylindrical. " Hob. — N.S.W. 



