81. NAIAD ACE.E. 35 



1135, C. ZOSTEKA NANA, i2ot/t. 



Area * 2 * * jjf ***** 11- 



South limit in Dorset, Isle of "Wight, Sussex. 



North limit in Northumberland. 



Estimate of provinces 2. Estimate of counties 4. 



Latitude 50—56. Local (Germ.) tjTpe of distribution. 



Agrarian region. Inferagrarian — Midagrarian zones. 



Descends to the sea level, in Channel i^rovince. 



Ascends, at the sea level, to Tyne province. 



Kange of mean annual temperature 51 — 4S. 



Native. Littoral. I am yet aware of localities for this 

 species in very few counties only ; namely Dorset (Mr. 

 Borrer), Isle of Wight (Dr. Salter), Hants (Dr. Bromfield), 

 Sussex (Mr. Borrer), Northumberland (Mr. Storey). To 

 these may perhaps be added the county of Caermarthen, 

 although the " much smaller plant than Z. marina" (DHl- 

 wyn's Materials) observed by Mr. Motley, washed on the 

 beach at Pembrey, in abundance, has been referred to Z. 

 angustifolia. The estimate taken above is made to ex- 

 press only the ascertained facts ; it being impossible at 

 present to make any other estimate beyond sheer guess- 

 work. The species may eventually be found far more 

 frequent on the English shores than is at present known ; 

 and it is not imlikely that some of the locaHties hereto- 

 fore reported for Z. marina, may belong to this smaller 

 species. It is reported to be washed up by tides on the 

 shores of Kent ; but it does not appear to have been ac- 

 tually found gi'owuig there. 



VOL. III. E 



