42 ON A NEW SPECIES OF PLANARIAN WORM. 
whilst I took it myself some years ago on the Briinig Pass, 
in Switzerland. Though some of the European species have been 
discovered under somewhat suspicious circumstances, which 
render artificial importation probable, 1 quite agree with Prof. 
von Graff in the opinion that all the European Rhynchodemide 
are truly indigenous to our Continent. 
REFERENCES. 
1. Denpy, A.—The Anatomy of an Australian Land-planarian- 
Trans. R. Soc. Victoria, vol. i. (part 2), 1889. 
2. Grarr, L. von.—Monographie der Turbellarien: II. (Land- 
planarien), 1899. . 
3. Kennet, J. von.—Die in Deutschland gefundenen Land- 
planarien Lthynchodemus terrestris und Geodesmus bi- 
lineatus. Arbeiten d. zool. Instituts Wiirzburg, vol. v., 
p- 120, 1879. 
4. Mosenny, H. N.—On the Anatomy and Histology of the 
Land-planarians of Ceylon, &c. Phil. Trans. Roy. Soc. 
vol. 164, 1875. 
5. Vespovsky, Fr.— Note sur une nouvelle Planaire terrestre 
(Microplana humicola). Revue Biologique du Nord de la 
France, vol. ii., 1890. 
6. Woopwortr, W. M.—Contributions to the Morphology of 
the Turbellaria: I. Bull. Mus. Comp. Zool. Harvard Coll., 
vol. xxi., 1891. 
DESCRIPTION OF PLATE 6. 
Fig. 1. Rhynchodemus Howesi, natural size, dorsal aspect. 
2. The same, natural size, ventral aspect. 
ph., pharynx; g, genital aperture ; s, sole. 
3. The same. ‘Transverse section through anterior region, x 435. 
e,eye; 6, brain; ep., epidermis; m, longitudinal?muscular bundles ; 
8, sole; sg., sensory groove; c¢., connective tissue. 
