NEWYORK SHELL CLUB NOTES No, 264 September 1980 Page 1 
The NEW YORK SHELL CLUB 
September through June, Fi sihdeidalh on the second Sunday of each month, 
ROOM 426, AMERICAN MUSEUM OF NATURAL HISTORY 
NEXT MEETING: SUNDAY, SEPTEMBER 14, 1980, at 2:00 pm 
PROGRAM TO BE ANNOUNCED 
ne 
CONTENTS 
Page 
Obituary: Morris Karl Jacobson Dorothy Raeihle 1 
AMU 1980 Dorothy Raeihle 2 
Highlights of the June Meeting Milton Werner 3 
Marsh Snails - The Gentle Grazgers Thomas M, Baird 4 
Cepaea nemoralis in the Pacific Northwest George Holm 5 
A Chemical "Time Bomb" (Repeat) Watts Journal 6 
Cavtat Completed Calypso Log of The 
Cousteau Society 7 
A Return of Haminoea Dorothy Raeihle 7 

MORRIS KARL JACOBSON 
We are extremely saddened as we report the death of Karl Jacobson on 
July 21st, in Melbourne, Florida. He was in the hospital with care 
and attention for what had been seemingly a slight heart attack on 
July 15th, but this was followed by a massive attack July 20th from 
which he could not recover. He was 73 years of age. A memorial 
service was held July 28th in Fresh Meadows, New York. 
Our deepest sympathy is with his wife Lena (Pinky), with his son J. 
Ernest and family of Staten Island, and with his brothers and sis- 
ters, most of whom live in the New York area. . 
Karl's interest in Mollusca spanned two generations, beginning after 
he moved to Rockaway in 1937. His brother Harold tells how he first 
showed Karl how to locate clams at low tide by stomping on the flats 
and watching them spurt (this was at Barren Island, near Floyd Ben- 
nett Field). The interest in shells developed steadily during walks 
on the beach with his small son, his inquisitive mind led him to 
study, and he amassed a wealth of material which was welcomed by the 
American Museum. Meanwhile he discovered shells in his own back 
yard, and during the years his neighborhood was being built up he 
Would visit vacant lots for further collecting and rescue other col- 
onies, particularly of Cepaea nemoralis, for transplant to his yard 
on Beach 139th Street, where they thrived under the ivy. In years 
to come, his interest in land shells would take precedence over ma~- 
rine or freshwater species. 
Karl was co-founder, with Dr. Walter H. Jacobs, 
A 
po reangliondy se, epheil Club, which had its first meeting in January 
of the New York Shel 
