The examples are too often injudiciously truncated, and perhaps sometimes, I hope very rarely, alleged in a mistaken sense; for in making this collection I trusted more to memory, than, in a state of disquiet and embarrassment, memory can contain, and purposed to supply, at the review, what was left incomplete in the first transcription.

Cells obliquely truncated above with a short spine on the outer angle; opening large, suboval, with an obtuse angle outwardly; margin slightly thickened, wholly unarmed. Habitat: Off Cumberland Islands, 27 fathoms, fine grey mud.

Such a canopy is just what is required by æsthetic considerations to complete the curiously truncated appearance of the top story, and there is nothing in the structural design to make it impossible or improbable.