Dr. M. Schultze on the Terrestrial Planaria?. T) 



Eyes along the entire margin of the body, closer in front, very 

 much scattered behind. Not rare. 



" 9. Geoplana Nephelis. Resembling the preceding in form, 

 but somewhat less elongated ; in form and colour it reminds 

 one of a Nephelis. Back uniform brown ; belly paler. Not rare. 



" 10. Geoplana Maximiliani. Almost like the preceding ; the 

 back with a paler, yellowish, longitudinal band. This species, 

 however, is further distinguished from the preceding one by its 

 mouth and genital orifice being placed far more posteriorly, and 

 its penis being almost globular, whilst in G. Nephe/is this organ 

 is long and cylindrical. In the latter, also, the orifice of the pro- 

 boscis appeared to have entire margins, whilst in G. Maximiliani 

 (when examined in a spirit specimen) it appeared deeply tive- 

 lobed. 



"11. Geoplana marmoruta. Length 4 inches, breadth 4 lines. 

 The eye-spots present nothing remarkable. The dorsal surface 

 is pale reddish-grey, with small black spots arranged in irregular, 

 repeatedly-anastomosing, longitudinal rows ; the ventral surface 

 is pale grey. The proboscis is dilatable into a flat cup with an 

 undulated margin (in a spirit specimen). 



"12. Geoplana pulchella. The anterior third of the body above 

 brownish tile-red, with oval w^hitish spots ; beneath grey, with a 

 whitish band in the middle. Eye-spots considerably approxi- 

 mated near the anterior margin; their series uninterrupted on 

 the anterior margin, missing on the posterior two-thirds of the 

 body. About an inch long, by fully 1 line in breadth, not very 

 much attenuated anteriorly. Only once observed. 



"13. Geoplana subterranea. This, even from its abode, is pecu- 

 liarly interesting, as it again enlarges the circle of vital condi- 

 tions under which this animal form is enabled to exist. After 

 finding Flat-worms in the clear spring-water of the mountains, 

 as well as in the lakes and fens of the plains, under the stones 

 of the sea-coast, as on the floating sea-weeds in the midst of the 

 ocean ; after obtaining the prospect of a rich fauna of terrestrial 

 Planaria which conceal themselves in damp moss, under stones 

 and bark, and rise to the summits of the primaeval forest, where, 

 between the spinous leaves of the Bromelia, they tind a per- 

 petually humid asylum, — Earth-Plauarits now make their ap- 

 pearance, companions of the Earth-worms and grubs. In cha- 

 racteristic opposition to its coloured congeners, so abundantly 

 supplied with eyes, which live above the surface of the earth, 

 this Geojjlana, dwelling in darkness, is without both the adorn- 

 ment and the sense of colour, — milk-white and destitute of eyes. 

 In its habit, this species is more removed than any other from 

 the typical form of Planaria. Its uniformly narrow, very long 

 body, rounded off at the extremities, which, with a length of 



