121 



Rochester ville. There he found good examples of fossil sponges, which 

 at first sight Mr. Whiteaves referred to the genus Galathmvi. They 

 require microscopic investigation before they can be I'eferred to their 

 proper places. 



The following species of unusual occurrence in these rocks are 

 recorded by Mr. Billings : Astylospongia fctrvula, Billings ; liecepta- 

 culiles occide-ntalis, Salter; Fttraia corniculum, Hall; Pasceolus 

 globosus, Billings (a smaller variety); Amygdalocystites florealis, 

 Billings; Agelacrinites resembling A. Billingsi, Chapman; Glyptocrinus 

 ornatus, Billings; Archceocrinus, n. sp.; Calceocrinus Imequalis, Billings; 

 Hyhocrhms conicus, Billings; Dendrocrinus proboscidialis, Billings. 



HENBY M. AMI. 



17th January, 1884. 



