432 APPENDIX. 



near Cuxhaven and Vera Cruz. Locomotion is not yet 

 satisfactorily observed. Diameter l-860th to l-430th. 



769. COSCINODISCUS lineatus. Shell-like lorica marked 

 by small cells, disposed in a series of parallel and 

 transverse lines. Found fossil in the chalk marl of 

 Caltanisetta, and in the live condition near Cuxhaven. 

 The cells in this species form parallel lines in whatever 

 direction they may be viewed. In large and well-preserved 

 fossil specimens as many as twenty-five openings were 

 seen near the circumference. Within the live forms 

 sometimes numerous yellow vesicles are seen, as in Gallio- 

 nella. Diameter of fossil 1 -1150th to 1 -480th; living, 

 1-1 150th to l-860th. 



770. COSCINODISCUS minor. Shell-like lorica with 

 small scattered cells, and the whole creature small in size. 

 Found fossil in the chalk marl of Caltanisetta, Oran, and 

 Zante ; and alive in sea water, near Cuxhaven. Diameter 

 1-1 150th. 



771. COSCINODISCUS oculus-iridis. Shell-like lorica 

 marked with rather large radiant cells, except near the 

 centre and circumference, where they are smaller. Some of 

 the larger cells at the centre form a sort of star. Found 

 fossil in the chalk marl of Greece, and alive in sea water 

 near Cuxhaven. This large species is curiously marked, 

 whilst under the microscope, with coloured rings, which 

 are apparently caused by the peculiar arrangement of the 

 cells. There are generally from five to nine large cells at 

 the centre. Diameter 1 -240th. 



772. COSCINODISCUS patena. The large shell-like lorica 

 marked with moderately-sized cells, disposed in concentric 

 circles. The cells decrease in size towards the circum- 

 ference. Found fossil in the chalk marl of Zante, and 

 alive in sea water at Cuxhaven. The young and vigorous 

 specimens of live individuals are completely filled with 

 yellow granules, whilst the older ones have an irregular 



