174 Hancke, Befruchtung uiul Inzestzuchfc. 



Pi/cnogonida 2 species 



Mollusca : Cephalopoda . . 



Gaxtfojioda . . 19 (1 with?; 



Lamellihranchiatff, 16 ('2 with'? 



Tunica ta 



Brachiopoda 1 



Vertnes 23 



Eclt inodcrm ft ta : Crmoidea 2 



Aster o idea 8 



Ophiuridea 8(7),, 



Echinoidea 1 



Holothurioidea 1 



Total 118 (110) species 



Other classes are also enumerated in N ares' list, but not having 

 as yet the material of the corresponding groups separated, I cannot 

 give, here, even provisorily, a para lei series. No doubt, the material 

 brought home by Nares' expedition was the coinpletest collection of 

 marine fauna from Baffin Bay and Smith Sound or, perhaps, the 

 only one. Since that time Greely's expedition is the only one that 

 has visited those regions before Peary; Greely's and Peary's first 

 expeditions did not bring home any valuable collections as no dred- 

 giugs were carried out. I have thought it proper to publish even 

 now this preliminary report to show how rich is the animal life in 

 those waters, how T little is known about the fauna and what a fertile 

 field for further explorations in zoological respects these seas are 

 which have hitherto been sounded so few times. 



The material will be worked up by specialists as soon as possible 

 and I hope then to be able to publish a full account of all forms 

 obtained during the expedition. 



Lund, Sweden, November 25th 1894. 



Die Bedeutung der Befruchtung mid die Folgen der Inzest- 



zuclit. 

 Von Wilhelm Haacke. 



t (Schluss.) 



Meiue Theorie der Inzestzucht liisst sich am besteu an der 

 Hand von Beispielen erlautem. 



Wir gehen aus von einem aus uicht miteinander verwaudten Stucken, 

 deren jedes gleichfalls von nicht miteinander verwandten Eltern ge- 

 zeugt ist, bestehendem Parchen v.on Tieren erster Generation, 

 dessen erstes Stiick aus der Plasmenkoinbiiiation ab besteht, wa'hrend 

 das zweite die Plasmenkombination cd entha.lt. Diese Tiere erzeugeu 



