Lima.

22. L. subauriculata, Montagu, (Pecten.)—L. nivea, sulcata, etc.—Plymouth, Man, Zetland, Belfast, etc., Mr. Nearly straight.

23. L. hians, Gmel. (Vitræa.)—L. tenera, fragilis, aperta, etc.—Channel Isls., Penzance, Oban, Belfast, etc., Mc. Oblique, gaping at sides.

24. L. Loscombii, Sowerby.Pecten and Ostrea and Lima fragilis and bullata.—Many Brit. loc., 10 to 50 fath., Mc. Oblique, closed at sides.

PLATE IX.

Pecten. Free, except 1.

Fig.

01. P. pusio, Pennant, (Ostrea.)—P., O., and Hinnites distortus and sinuosus.—Brit. co. generally, 15 to 90 fath., C. Irregular, attached to stones, etc.