NEW YORK SHELL CLUB _ NOTES 
Page 6 May 1979 No. 252 
CYPRABA LEUCODON IN LOCAL COLLECTION 
j ber Waverley Harmon who has just 
Congratulations are due to NYSC mem y arbderin, eon. 
acquired an 80.2mm specimen of Cypraea lLeucodo : 
This excellent specimen is somewhat darker GEOWr, tag Geer Ea 
i Mr. and Mrs. H, Hor 
specimen belonging to Couie (NTSC NOTES No. 245.6,7). The 
on this species in an earlier ) 
spotting tf the new specimen is also somewhat different than the 
spotting of the Horn's shell -- this one tends to have larger and 
more clearly defined spots. 
The shell was collected a few weeks ago from very deep water (esti- 
mated at 150 fathoms) off Santa Rosa Island in the Philippines, in 
nets such as I described in earlier articles. The Harmon specimen 
is the only specimen that I know of in the metropolitan New York 
area. 
Robert H. Janowsky, March 16, 1979 
ok ee aes 
MUSSEL WATCH 
We learn from AUDUBON Magazine of March 1979 (p. 18) that there is 
a "United States Mussel Watch" with 105 collection sites. It seems 
that Mytilus edulis, which has a wide distribution in this country 
and Europe, has been found to be an excellent point of study to 
check pollution levels. The mussels naturally take in and collect 
the pollutants along with the nutrients from the sea water as it 
flows over their gills. What is valuable is that many pollutants 
can be identified, and frequently the source of the pollutant can 
be traced. 
The article refers to the work of Edward Goldberg of Scripps Insti- 
tution and notes that the chemical analysis of the mussel to dis- 
cover possible pollutants is considered more precise than other 
laboratory methods. 
In NOTES No. 238.6 we reported the use in Alaska of Macoma balthica 
as a "Watchclam" in similar checks. 
dr 
MALACOLOGICAL ARTICLE OF THE MONTH 
Re: Corbicula manilensis 
"Effects of potassium on adult Asiatic clams, Corbicula manilensis" 
Hi en aes pr srt in Biol. Notes No. 98, Illinois Nat. _ 
st. Surv. July 19 y Drs. K. B. Anderson, C. _B 
Sparks and A. A. Paparu. on, C. M. Thompson, R 
Since the introduction of Corbicula manilensis fr East 
into North America in 19358 it has spread rapidly on atuecaHe a very 
costly liability, causing the shutdown of plants for condenser pipe 
cleaning and accumulation in reservoirs. Laboratory experiments 
show that potassium levels could limit distribution by quickly pro- 
ducing foot immobilization. Further study is required to determine 
the chronic effects of potassium on this mollusk. 
Henry D. Russell 
May we hope that the “further studies”consi 
sidered d i fects 
of potassium on other organisms found in the Aetieed oc oho 
