October 25, 1941 
2725 Mont lake Blvd. 
Seattle, Washington 
Dr. Waldo Schmidt 
U. S. National l?useum 
Washington D. C. 
Dear Dr. Schmidt; 
We have an abundance of measurements of commeixsial si ze 
crabs. However, data of small crabs is greatly lacking. Will 
you please send the small crabs you collected last fall so we 
can measure them. At present approximately 9,600 crabs have 
been measured, which have provided a total of more than 40,000 
measurements. 
The lack of moulting records is our most perplexing problem 
at present. Only three or four tagged crabs were recaptured 
that had moulted. All except one of these were crabs you had 
tagged in Canoe Bay last fall. These moulting records along with 
five or six I secured from crabs allowed to shed in traps show an 
increase of from two to five times as much as Marukawa reports. 
These few moulting 3?ecord3 would seem to indicate that we have 
a different rate of growth here than Marukawa found in Japanese 
waters. It seems to bad that further studies cannot be made soon, 
IsTr, Heu^rison is sending you a copy of the article about the 
findings made on the trip of Pacific Fisheries and Trading Co, 
in 1938-1939, I wrote it about a year ago and had intended send- 
ing it to you then but never got it tsrped until recently. Very 
inadequate facilities were available at the time of the study, so 
I *m sure a more complete article can be written as a result of 
the past years study. Please criticize it freely so we will know 
better how to write the Bureau report. 
Dr. McMillin has been giving me some very valuable assistance 
in working up the measureaents. He is reluctant to accept some of 
Marukawas conclusions. 
Sincerely 
M, Marvin Wallace 
