216 Dr. W. T. Caiman on Munidopsis polyraorplia. 



differs markedly from all the littoral and sliallow-water species 

 of Galatheidae^ which have well-developed eyes and numerous 

 small eggs. 



Munidopsis pohjmorphn, Koelbel, female, X 3. 

 a. One of the eggs, on same scale. 



I have been unable to find any record of a marine animal 

 living under conditions similar to those described for M. poly- 

 morpha. Many littoral forms are known to haunt caves on 

 the sea-coast, but none of these show special adaptations to 

 this habitat and none are specially related to abyssal forms. 

 It would be of great interest to ascertain whether the species 

 or any related forms occur on the shore or in shallow water in 

 the neighbourhood of Lanzarote. In view, however, of the 

 exclusively deep-sea habitat of the other species of the genus 

 this is unlikely. It seems more probable that the present 

 inhabitants of the cave are the descendants of some deep- 

 water species which, having been carried * into the fissures by 



* Chun has given an interesting account of the way in which animals 



