82 
Woodworth, W. Mc. M., 1898. Some Planarians from the great Barrier 
Reef of Australia. Buli. Mus. Comp. Zool. Harvard College. Vol, 
XXXII, Cambridge, Mass. 
Yeri, Megumi, and K ab urak i, Tokio, 1918. Description of some Japa- 
nese Polyclad Turbellaria. Journal of the College of Science, 
Imperial University of Tokyo. Vol XXXIX, art. 9. 
— — 1920. Notes on two new Species of Japanese Polyclads. Anno¬ 
tationes Zoologicae Japonenses. Vol. IX. Part. V. Tokyo. 
Zåhony, R. Ritter von, 1907 Turbellarien: Polycladiden. Ergebnisse der 
Hamburger Magalhaensischen Sammelreise. 1892—93. Bd. 111. 
Hamburg 1896 — 1907. 
Explanation of the Plates. 
Plate I. 
Pig. 1. Ceratoplana colobocentroti n. g. n. sp. from Krakatau. Dorsal view 
ofanimal. The pigmentation belongs to muscular wall and parenchyma. 9x. 
Fig. la, Ventral view of the same animal. 
Ceratoplana colobocentroti var. hawaiiensis n. var. 
Fig. 2-9. 
Fig. 2 and 3. Dorsal and ventral views respectively of a specimen in alcohol. 
Tentacles show the natural shape. 3.4 x. 
Fig. 4. The same specimen in cedar-wood oil. 6 x. The bi-lobed brain Clearly 
visible. 
Fig. 5 and 6. Dorsal and ventral views respectively of another specimen, 
which has the pharynx protruded through the mouth. 
Fig. 7 and 8. Ventral and dorsal views respectively of a third specimen with 
strongly contracted tentacles. 
Fig. 9. The same specimen, transparent in cedar-wood oil. Pharynx appears 
as a black band and the tentacles as black dots. 
Piate II. 
Discostylochus parcus n. g. n. sp. 
Explanation of lettering: 
de, ductus ejaculatorius. 
dgi, ductus genito-intestinalis. 
e, entrance of the ductus g. i. in the intestine. 
ep, epithelium of the ductus g. i. 
fvs, false seminal vesicle. 
i, intestinal branch. 
md, muscularis of the ductus genito-intestinalis. 
mi, main gut of the intestine. 
