36 



O. NORDGAARD 



1915 



same 75 mm. Distance from fore end of cavity to upper edge 

 57 mm. Thickness of capsule walls V2 — 1 mm. 



Fig. 11 shows the dorsal side of the same as in fig. 10. It 

 will here be seen that the end tubes are in reality not so short 

 as indicated above, for as a matter of fact, these tubes should 

 be reckoned as eommeneing from the corners of the capsule 

 cavity, with which they are connected. It is only the free por 

 tion of the tubes in capsules of R. nidrosiensis which is com- 

 paratively short; between both apical and basal end tubes there 

 is a disc consisting of two leaves stuck togelher. This is, in the 

 case of R. nidrosiensis, very broad (abt. 57 mm.). On glancing 



at fig. 6, it will be noticed that in R. 

 radiata the capsule has very narrow ter- 

 minal discs. As it is an advantage to 

 have brief lerms for the various struc 

 tural parts of the capsule, I suggest that 

 the tubes at the fore end be named the 

 apical, and those al the hinder end the 

 basal, the corresponding terminal discs 

 being similarly indicated as apical and 

 basal. 



On the 13 /io 1916 I got 2 specimens 

 of R. nidrosiensis from the Munkholm 

 deep, male and female. 



Fe male. Total length 196 cm., 

 breadth 136.5 cm. Length from anus to 

 the end of the tail 81 cm. On the dor- 

 sal side there were 3 series of spines, of 

 which the middle one was least devel 

 oped. The distance from the base of 

 the 2. dorsal lin to the end of the tail 

 was 9 cm. In the ovaries was found 

 large and small eggs, the greatest eggs 

 Fig. 11. Egg capsule of na< ^ a diameter of 5.5 cm. In both of 

 R. nidrosiensis, 2 % 1908, the oviducts there was an egg capsule, 

 Munkholm deep. the apical end of which was 'straightly 



cut and directed towards the genital 

 opening. Yellowish threads were covering the capsules. The 

 outer basal tube was also bent, but the inner basal tube stood 

 straight out from the capsule. Each of the broad sides was 

 somewhat convex and most curved was the side which lav up 

 to the dorsal side of the fish. According to my former conclu 

 sions I suppose that the side with the greatest convexity is the 

 ventral one. Thus the dorsal side of the capsule is likely turned 

 lo the ventral side of Ihe fish. 



