122 SPOLIA ZEYLANICA. 
ol 
The following eight species of the Rhynchodemidze have been 
described from Ceylon :— 
(1) Rhynchodemus nematoides, Loman. 
(2) Rhynchodemus ceylonicus, von Graft. 
(3) A na teres, von Graft. 
(4) Amblyplana Trcecheli, von Graff. 
(5) Nematodemus lumbricoides, von Graft. 
(6) Platydemus thwaitesi, Moseley. 
(7) Dolichoplana feildeni, von Graff. 
(8) Dolichoplana nietnert, Humbert. 
All the above species have been found to be distinct from the 
present species in their external characteristics. Some principal 
points of difference may be mentioned as follows :— 
(1) Rhynchodemus nematoides : yellow ground colour; four dorsal 
stripes. 
(2) Rhynchodemus ceylonicus.: yellow ground colour; three 
dorsal stripes are distinct throughout the length of the 
body. 
(3) Amblyplana teres: body is relatively short and thick; a 
deep reddish-brown colour ; no dorsal stripes. 
(4) Amblyplana heckeli: yellow ground colour; four dorsal 
stripes. 
(5) Nematodemus lumbricoides: grayish-brown ground colour ; 
one dorsal stripe. 
(6) Platydemus thwaitesi : ground colour is nearly the same as 
in the present species, but the three dorsal stripes are 
distinct from the ground colour. 
(7) Dolichoplana feildeni: the body is very large; six dorsal 
stripes. 
(8) Dolichoplana nietneri: body is very large; six dorsal stripes. 
- Lastly, it may be added that I have examined some references* 
dealing with a few species of the Rhynchodemide which appeared 
later than von Graff’s Monograph, but no allied forms have been 
found in them. 
* Mell, C.—Die von Oscar Neumann in Nordost-Afrika gesammeltan Land 
Planarien (4 n. sp. of Amblyplana, 3 sp. of Platydemus), Zool Jahrb., Abt. 
Syst., Bd. 20, 1904. 
“Laidlaw, F. F.—On a land planarian from Herule, Male Atoll, with a note 
on Leptoplana pardalis, Laidlaw \ehymehed.euuns ceylonicus ?), Fauna and. 
Geogr. Maldive Laccadive Archip., vol. 2, 1903. 
Scharff, R. F.—New planarian ee Howest), Abstr. Journ. Roy. 
Micro. Soe. ,» London, 1900. 
