A large slug, yellowish gray above, with many irregular spots of clear yellow on the shield, and oval yellow rugae on the body; the gray disappears on the sides, which towards the front are entirely pale yellow; tentacles bluish.
Internally it is distinguished by having a long blind sac or caecum on the hindgut. The slime is yellow. Length 75 to 100 mm. or more. The shade of gray as well as the tint of yellow vary in different lots. Some from Philadelphia, Pa., New Albany, Indiana, and Unionville, Alabama are almost black with many small yellow spots on the individual rugae of the surface.
It is a slug of cultivated places, such as suburban gardens, greenhouses, cellars, wells and the like. It is said to prefer fungi to leafy plants. It is fond of tender vegetables and specimens in captivity have readily eaten lettuce, romaine, cabbage, carrot, potato and turnip. It was particularly fond of romaine root." (W. O. Gregg.)

Distribution.—Throughout temperate Europe; imported in many European colonies in other continents.
US:
MAINE: Portland and Bar Harbor. MASSACHUSETTS: Boston. New Bedford. CONNECTICUT: New Haven. NEW YORK: Monroe. Tompkins. Onondaga. Herkimer. Albany, New York counties, and Long Island. NEW JERSEY: Burlington, 1S69; Camden. PENNSYLVANIA: Philadelphia, York. West Chester. MARYLAND: Baltimore, 1869; Chestertown, Kent Co. DISTRICT OF COLUMBIA, 1891. VIRGINIA: Richmond. SOUTH CAROLINA: Charleston, Graniteville. GEORGIA: Athens and Savannah. 1S85. ALABAMA: Auburn; University. INDIANA: New Albany. Floyd Co. ILLINOIS: greenhouses in Lincoln Park. Chicago. MISSOURI: St. Louis. ARKANSAS: Magazine Mt.; Hot Springs. ALABAMA: Unionville. 192S. TEXAS: Houston. 1923; Waco; Nacogdoches, CALIFORNIA: San Luis Obispo Co.; Los Angeles. 1902; Santa Barbara Co.; Redlands, San Bernardino Co. (Berry); Orange Co.; Halfmoon Bay. San Mateo Co.; Ojai, Ventura Co.; Chico,