NOTES ON A NEW LAND PLANARIAN. Va 
Thus, as regards the above-mentioned characters, Dolichoplana 
seems to most resemble the present form, next Platydemus and 
Rhynchodemus in order. Even Dolichoplana can hardly claim direct 
relationship to the present species, when we take into consideration 
those characters relating to the distribution of the longitudinal 
parenchyme muscles and the structure of the female copulatory 
organs. Platydemus is characterized by having a broad sole and by 
lacking the erythrophile glands and the chondrocysts of the integu- 
ment. Besides, the unpaired sensory organ, the paired ciliated 
organs, and the reversed relative positions of the marginal and the 
sensory margins are remarkable characters, all of which indicate 
clear points of difference between the present species and the 
established genera of the Rhynchodemide. 
For these reasons I propose to establish a new genus and species 
for the animal as follows :— 
Pseudartiocotylus ceylonicus, n. 2. et n. sp. 
The genus may be diagnosed as follows: The body is elongate 
and rounded, and the anterior end is blunt and flattened on the 
ventral side. The glandular margins are well developed in the 
head region and lie dorsal to the sensory margins, which are poorly 
developed. The sole is narrow but distinct, and in its anterior 
part is modified into two-paired ciliated organs. Beside the two 
a Retina-Augen,”’ a single unpaired sensory organ is present at the 
head-apex. 
As already referred to, Pseudartiocotylus ceylonicus bears a curious 
resemblance to Artiocotylus speciosus in having similarly constructed 
female genital organs. Whether this implies more than a chance 
resemblance ought not to be hastily decided from the present 
observations made on the single specimen. Similar hesitation 
must be expressed with regard to the resemblance between the 
ciliated organs of the present species and the suckers of Artiocotylus 
speciosus. I hope to have in the future a further opportunity of 
studying these interesting points. Here is von Graft’s view of the 
origin of the suckers of the Cotyloplanide : “‘ Auch die Familie der 
Cotyloplanide ist keine natiirliche Gruppe und die Gattungen 
Cotyloplana und Artiocotylus weisen nach dem Baue ihres Nerven- 
systems und ihrer Musculatur—von dem aberranten Typus der 
Geschlechtsorgane bei Artiocotylus gang abgesehen——auf vollig 
getrennte Urspriinge hin. Der fiir die praktische Systematik so 
brauchbare Charakter der Saugniapfe diirfte also in jeder der beiden 
Gruppen selbststandig erworben sein.” * 

* Von Graff, op. cit., p. 286. 
R 6(2)11 
