44 Dr. D. Bergendal on the Land-Planartce. 



Scytonema pentcillaium, Ag. 

 Ferguson ! 

 Geogr. distr. Blekingia. 



Lynghya majuscula^ Hook. 



Harvey ! No. 84. 



Geogr. distr. Mauritius, Socotra {Balfour' !), Europe, North 

 America, Bermuda, Martinique. 



Trichodesmium erythrceuniy Ehrenb. 



Ferguson ! 



Geogr. distr. Bed Sea, Indian Ocean, Chinese Sea. 



HyphcBothrix confervce^ Kiitz. 

 Ferguson ! 

 Geogr. distr. Germany. 



Cylindrospermum macrospermum, Kiitz. 



Ferguson ! 



Geogr. distr. Throughout Europe. 



IV. — Contribution to the Knowledge of the hand-Planarice. 

 By Dr. D. Beegendal *. 



In the orchid-house of the Botanic Garden in Berlin some 

 Bipalia were observed last autumn. These have since greatly 

 multiplied there, and I have made a careful investigation 

 of them in the Berlin Zoological Institute. In 1878 Moseley 

 described f Bijpalium Icewense from the hothouses of Kevv 

 Gardens. The form here observed seems to be identical with 

 this, although the ground-colour of the back is usually more 

 of an olive- green and the streaks are almost quite black. 

 The head is comparatively small, with a dark crescent upon 

 the upper surface. The mouth is situated further forward 

 than in most other Bipalia, at the anterior end of the second 

 third of the body. The animals found are all without any 

 developed sexual organs. Only in one animal have I been 

 able to interpret some small aggregations of cells in the sec- 

 tions as the rudiments of testes. Of the oviducts and vasa 

 deferentia I have never observed any traces. In other Bi- 



* Translated from the * Zoologischer Anzeiger/ No. 249, April 18, 

 1887, pp. 218-224. 



t Ann, & Mag. Nat, Hist, ser, o, vol. i. p. 238, 



