140 



THE VOYAGE OF H.M.S. CHALLENGER. 



Table Y. — Showing the Association of Crinoid Genera at different Stations occupied hy 

 the "Porcupine," Cliallenger, and "Talisman," together with the number of Species 

 obtained at each Station. 



Table VI. shows the association of Pentacrinus, Holopus, Rhizocrinus, and the three 

 Comatuhd genera in the Caribbean Sea, together with the number of times that two or 

 more species of Pentacrinus were found at the same Station. Comatulse were obtained 

 some eighty times ; but as I have not yet been able to determine them critically, I have 

 found it impossible to give the number of species occurring at each Station^ as has been 

 done for the Challenger dredgings. 



