FAUNA AND FLORA OF THE SEA BOTTOM. 



I24I 



^■{^EYA RD 



Fig. 5«. — Local distribution of tbe gastropod mollusk Tritia trivittata. This species was recorded from 353 stations out 

 of the total of 41 7 comprised within the Hniits of the map. It has thus the most general distribution of any species of 

 animal dredged within these waters. 



a The circle around the star, here and elsewhere among t!ie moUusks, denotes the known occurrence of living speci- 

 mens. Where the circle is wanting, either dead shells only were present or the point is not indicated in the records. 

 This symbol has, however, been employed only in the case of shell-bearing animals. 



B. B. F. 1908— Pt 2—36 



