604 LÖNNBERG. NOTES ON SOME RARE CEPHALOPODS. 



but in old specimens qiiite | of the same measureraent. In young 

 specimens the viscera are situated as Steenstrup describes it: 

 »i en naesten samlet Masse langt tilbage imod KappehulensBund»^) 

 but in mature specimens they are much larger so that the anus 

 with its appendages extends into tbe base of the fannel. Even 

 in this old specimen the funnel organ is well developed especially 

 the »lateral pads» (Weiss 1. c.) and a small valve is conspicuous 

 anteriorly. Having made sections of this organ for examination 

 of histological details, I have found the pads to consist af a 

 large columnar goblet epithelium. The nuclei are mostly placed 

 in the middlepart of the cellules. At the base of the cellules 

 we find a layer of very darkly stained protoplasma. The main 

 part of the cellules however contains a mucus-like substance of 

 which a great deal has already been excreted, and covers the 

 infundibular surface of the organ. By studying the sections 

 with a moderate, magnifying power, we see three darkly stained 

 stripes on each section, the first at the base of the cellules 

 produced by the above mentioned darkly stained protoplasma, 

 the second at the middle of the cellules produced by the nuclei 

 and the third at the top surface of the cellules. It was at first 

 difficult to see what caused the last of these stained stripes but 

 by the aid of a high magnifying power and by isolating the cellulär 

 elements I found that it was efi'ected by the stained remnants 

 of already emptied cellules. These remnants are cup- or bell- 

 shaped with a widely open mouth. The rims of these cups are 

 not so darkly stained, but the basal part is, and sometimes one 

 can see remnants of the nucleus, but even in other cases when 

 the nucleus is not conspicuous any longer, I suppose that the 

 stained substance in these parts is derived from the degenerated 

 nuclei. The middle and basal part of these cellules remains as 

 a thread carrying the bellshaped rest. 2) As I have not sufficient 



1) Vid. Medd. Naturhist. For. Kjöbenhavn 1881 p. 294. 



^) To a certain degree this structure resembles that of the nidamental glands 



of LoUgo and other Cephalopods as it is described by Brock, Zeitschr, f. Wiss. 



Zool., Bd 32, Leipzig 1879. 



