Diagnosis
Among species of Hemphillia in BC, H. glandulosa is recognized by its smaller size, densely papillate dorsal hump, and fleshy horn-like protuberance at the end of the tail.
Animal
A small slug, brown with bluish-grey head and tentacles; dorsal hump/mantle with darker streaks and spots, covered with numerous, close-packed papillae; dorsal keep highly arched and laterally compressed; end of tail with a fleshy "horn".
Shell Mostly internal (small area exposed dorsally); plate-like, thin.