Illustrated Index of British Shells / Containing figures of all the recent species

by G. B. Sowerby

Hippothyris. Fixed by byssus.

17. H. psittacea, Gmel. (Anomia.)—A. rostrum-psittaci, Chem.; Terebratula psittacea.—Northumberland, Fr. Forth; deep water, Rr. as Brit. "The Parrot's-beak Anomia."

Terebratula. Fixed by byssus.

18. T. cranium, Müller.—Anomia c., and T. vitrea.—Zetland; deep water, unique as Brit. Smooth, oval.

19. T. capsula, Jeffreys, Ann. Nat. Hist., Jan. 1859.—Belfast Bay, R. Minute, punctured.

Argiope, or Megathyris.

20. T. caput-serpentis, Linn. (Anomia.)—A. and T. retusa, pubescens, costata, and aurita.—Oban, Skye, etc., 20 to 50 fath., Mr.

21. A. cistellula, S. Wood. (Terebratula.)—A. seminulum?, T.

22. A. decollata, Chemn.—A. detruncata.—Guernsey, R.

23. A. seminulum, Philippi.—Croulin, near Skye, Jeffreys.