NOTES ON A NEW LAND PLANARIAN, AE MUR 
NOTES ON A NEW LAND PLANARIAN FROM CEYLON. 
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By Dr. Iwast [kepDa. Xe 
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(With Plate TV. and one Text Figure.) 

N March last Professor R. C. Punnett kindly handed me an 
interesting animal which was caught at Namunukula, Ceylon, 
by Dr. Willey, then the Director of the Museum at Colombo. At 
first I took the animal to be a land nemertean, but it soon became 
clear that I was dealing with a land planarian. Further examina- 
tion has revealed the fact that the anima! is not only an undescribed 
form of the Rhynchodemide, but it also possesses several remarkable 
characters, some of which are quite new to the family. Moreover, 
some of these peculiarities are similar to certain typical character- 
istics of the family Cotyloplanide. The following is a_ brief 
description of this curious land planarian, representing a new genus 
and a new species. I wish to record my thanks to Professor Punnett, 
who kindly gave me the valuable specimen in connection with my 
studies. 
Pseudartiocotylus ceylonicus, n. gen. et n. sp. 
The single specimen (Plate IV., fig. 1) was preserved in formaline 
and was in a fairly good condition, except that it was torn near the 
posterior end. The body, which is nearly round in section, is about 
28 mm. long and 2 mm. thick at its broadest part. The anterior end 
is much broader than the posterior, which is pointed. Anteriorly 
the bedy is conspicuously compressed dorso-ventrally so as to form a 
distinct head-flap, which is turned upwards. On the ventral side 
of the head-flap there is a small depression, which is shallow but 
well defined, lying just in front of the anterior termination of the 
sole. Anteriorly and laterally the depression is bordered by a 
prominent ridge of a horseshoe shape, while posteriorly it becomes 
shallower, and gradually merges into the general ventral surface. 
By means of sections it has been ascertained that this ridge repre- 
sents anterior portions of the so-called glandular margins (‘‘ Driisen- 
Kante ’’), which are developed slightly below the lateral margins 
of the body, and extend backwards to about 3°5 mm. from the head- 
apex. Fuller description of this structure will be given later. At 
the very tip of the head there is present a small colourless spot (see 
Plate IV., figs. 1 and 3) measuring about 0°6 mm. in diameter, which 
is, as I shall try to prove later, a sensory organ not hitherto d-scribed 
in land planarians. Two small deeply-pigmented eye-spots (see 
Plate IV., figs. 1 and 3) are situated slightly behind the above organ. 
On the dorsal side the colour of the animal is dark brown mixed 
with a light violet tint, both ends, especially the anterior, being 
Q 6(2)1] 
