Origin of soft-shell
Examples from the Web for soft-shelled
All North American soft-shelled turtles belong to this genus.
This turtle is large, sometimes three feet long; and it deposits a great number of soft-shelled eggs in the sand.Zoology: The Science of Animal Life|Ernest Ingersoll
Soft-shelled crabs require a somewhat different kind of preparation.Woman's Institute Library of Cookery, Vol. 3|Woman's Institute of Domestic Arts and Sciences
The soft-shelled nut is very small, no larger than the tip of your little finger.On the Trail|Lina Beard and Adelia Belle Beard
The only foods, therefore, primarily obtainable by him which he could use to advantage were fruits and soft-shelled nuts.Foods and Culinary Utensils of the Ancients|Charles Martyn