194 



DR. A. ARNBACK-CHRISTIE-LINDE ON THE 



figure shows three transverse sections of the genital pouch with 

 the ducts, which are cut obliquely. The brood-pouch is repre- 

 sented by a short blind sac ; like the oviduct, it is compressed from 

 side to side. In text-figure 8 a the oviduct and the brood-pouch 



Text-figure b\ 



Text-figure 7. 



oa-- 



"•vd. 



Text-fig. 6. — KilTcenthalia borealis (Gottsch.). 



Transverse section of the genital pouch. X 110. 

 od. Oviduct, vd. Vas deferens. 

 Text-fig. 7. — Kukent7ialia borealis (Gottsch.). 



The reproductive organs from the outside. X 23. 

 bp. Brood-pouch. a. Ovarium. od. Oviduct. t. Testis. 

 vd. Vas deferens. 



Text-figure 8. 



KuJcentJialia borealis (Gottsch.). 



Sections through the genital pouch, showing the distal part of the oviduct and 

 the rudimentary brood-pouch ; cut obliquely. X 50. 



bp. Brood-pouch, od. Oviduct, o. Opening into the peribranchial cavity. 

 vd. Vas deferens. 



are still separated ; fig. b shows how the oviduct opens into the 

 brood-pouch, and in fig. c the opening into the peribranchial cavity 

 is visible. 



Whether this blind sac is to be regained as a vestigial trace or 

 possibly as a rudiment of the brood-pouch, is a question which 



