File:Sea slugs Ancula cristata and Doris - Philip Henry Gosse - 809 1997 76.jpg

Enlarged drawings of two sea slugs found on Devon’s coasts. No shell is present in the adult state, and the breathing organs, in most cases, are exposed on the back of the animal. The upper figure represents an elegant little creature about half an inch in length and called Ancula cristata (now known as Ancula gibbosa). Doris, shown on the lower half of the sheet, is a larger animal, often found between tide-marks. The spawn of this animal is attached to rocks or weeds and resembels a band of ribbon, or frills of fine lace. A single mass of spawn has been calculated to contain not less than 50,000 eggs.

Enlarged drawings of two Sea slugs found on our coasts. They are Molluscs belonging to a group the members of which are noted for their remarkable shapes and often brilliant colouration. No shell is present in the adult state, and the breathing organs, in most cases, exposed on the back of the animal. The upper figure represents an elegant little creature about half an inch in length and called Ancula cristata. There are two tentacles with basal appendages at the anterior end of the body, and the gills are placed in the middle of the back. Doris, shown in the lower half of the sheet, is a larger animal, often found between tide-marks. The spawn of this animal is attached to rocks or weeds and resembels a band of ribbon, or frills of fine lace. A single mass of spawn has been calculated to contain not less than 50,000 eggs.