ANIMALS IN BRINE SPRINGS. 145 



Indies, lias long been known, which, like ^trifina J/ 

 (Risso) at Xiee, lives in the sea. I brought a great number of 

 marine Xeritina? from the Philippines, the Pelew Islands and 

 China, which from their variations are of the highest interest. 

 I have also found a few species of Jfelania in brackish water; 

 several species of Lymnwa and a Xeritina live at Bornholin in 

 the Baltic, in spots where the water contains from 1 to 1*5 per 

 cent, of salt. The Oligocha?tous Annelida, to which the earth- 

 worm belongs, are typical fresh-water or land forms : neverthe- 

 it least nine or ten species are known which live on the 

 sea-shore in salt water ; they belong to the genera S&nuris, 



FIG. 36. Pathydrilm sp., living in the Salines of Kissingen. It belongs to a group of 

 worms, Oligoehixta, which is principally confined to fresh water. 



Tu^ifex, and others. Marion, at Marseilles, has 

 discovered a new genus nearly allied to the common earth- 

 worm, which he has called Pontodrilus ; this worm lives there 

 under stones and decaying tangle, far from all fresh water, and 

 below high-water mark, so that it is apparently alteruately 

 moistened by salt water and fresh (rain) water. In the veiy 

 strong brine springs of Kissingen, I myself have found a new 

 species of the genus Pachydrihis (fig. 36), of which Clapamle 

 found another species on which he founded the genus in the 

 brine of Kreuznach : they are remarkably near to the fresh- 

 water form, Tnbifex. Finally. I will mention that the common 

 stickleback. (/">' ,-<->*/> us acitkatiis, which usually lives in 



