ZOOLOGKVVL RESULTS OF A TOUR IN THE FAR EAST. 
BRACKISH-WATER POI.YCl.ADS. 
By ToKio Kaburaki, Rigakushi, Science College, Imperial University, Tokyo. 
With one plate and two text-figures. 
The brackish-water Polyclads serving as basis for the present paper were col- 
lected by Dr. N. Annandale in January, 1916, in the Tale Sap or Inland Sea of 
Singgora on the west side of the Gulf of Siam. The collection, though smaU and 
consisting of only two species, is highly interesting, representing, as it does, forms 
closely alhed to Shelf ordia borneensis, Stummer-Traunfels ', the only known freshwater 
Poly clad. 
Before proceeding further, I take this opportunity to express my sincere gratitude 
to Dr. N. Annandale for the privilege of working at the planarians. I further desire 
to express my best thanks to Professor I. Ijima for many valuable help given me 
during the work. 
Shelfordia annandalei^ n. sp. 
PI. VIII, figs. I— 5.— Text-fig. I. 
This new species is based on twenty-eight specimens, all which were collected 
from the under side of stones and potsherds on the muddy shore of Koh Yaw Island, 
Tale Sap near Singgora. 
Form and s^'^^.— According to Dr. Annandale's notes, the anterior part of body in 
the living state was broadly rounded but not expanded in front, and the posterior end 
narrower. The body in the preserved condition is elongate-oval, of a firm consistence 
and without any sign of tentacles, measuring 7-5 — 12 mm. long by 3 — 5'5 mm. across 
in the broadest part. The worms in the living state must have shown about the 
same ratio of dimensions. 
Coloration. — According to the collector's notes taken while the worms were living, 
the dorsal surface of the translucent body was of an uniform olive-greenish colour 
without any marking. Some of the smaller specimens were somewhat reddish. The 
ventral surface was much lighter than the dorsal. 
Eye-spots (text- fig. i). — Tentacular eye-spots of a somewhat large size occur in two 
oblong clusters, each consisting of 21-23 eye-spots. In the preserved condition the 
clusters are separated from each other by a median space, about half as wide as their 
distance from the frontal margin and about one-third as wide as the distance of either 
I Stummer-Traunfels, R. Ritter, von, 1902. " Eine Siisswasserpolyclade aus Borneo." Zool. Anz., Bd. XXVIj 
pp. 159-161. 
