176 SEA-SHORE LIFE 
Crab, Horseshoe (Limulus)—Arnold, A. F., Sea Beach at Ebb Tide, p. 295, Pl. 64. 
Packard, A. 8., Memoirs Boston Society of Nat. Hist., 1880, 
MOLLUSKS. 
Clam, Littleneck (Venus mercenaria)——Verrill & Smith, Invertebrate Animals of 
Vineyard Sound, p. 65, Pl. 26, Fig. 184, 1874. Kellogs, J. L., Bull. New 
York State Museum, No. 71, Sept., 1903. 
Clam, Sandbar—(Siliqua costata)—Dall, W. H., Bull. U. S. National Museum, No. 
Bly lS as library lots)! 
Clam, Bloody (Argina pexata)—Davenport, C. B. and G. C., Introduction to Zoology, 
p. 184. 
Ship Worm (Teredo)—Verrill and Smith, Invertebrate Animals of Vineyard Sound, 
p. 90 (384), Pl. 26, Fig. 183. Quatrefages, A. de, Annal Sci. Naturelles, 
Tom XI, pp. 202-228, 1849. Hatschek, B., Arbeit Zoolog. Institut Univer- 
sitat Wien, Bd. III, Heft 1, 1880. 
Seallop (Pecten irradians)—Davenport, C. B., American Naturalist, Vol. XXXIV, 
pp. 863-878, 1900. Also, Mark Anniversary Volume, 1903. 
Scallop, Arctic (Pecten islandicus)—Gould and Binney, Invertebrates of Mass., p. 
198, Fig. 495. 
Snail, Sand-Collar (Lunatia)—Verrill and Smith, Invertebrate Animals of Vineyard 
Sound, p. 59 (353), Pl. 23, Figs. 130, 133, 136. 
Snail, Salt Marsh (Melampus bidentatus)—Verrill and Smith, Invertebrate Animals 
of Vineyard Sound, PI. 25, Figs. 169, 169a. 
Whelk (Fulgur)—Arnold, A. I'., Sea Beach at Ebb Tide, PI. I. 
Periwinkle (Littorina lttorea)--Bumpus, H. C., Zoological Bulletin, Vol. I, 1898. 
Bigelow and Rathbun, American Naturalist, March, 1903. 
Nautilus—Griffin, L. E , Memoirs of National Academy U.S., Vol. VIII, 1900. Dean, 
Bashford, American Naturalist, Vol. XXXV, pp. 819-837. 
Giant Squid (Architeuthis princeps)—Verrill, A. E., Am, Journal of Science, 1874, 
p. 158; 1875, pp. 123, 177, 213; 1876, p. 236; 1877, p. 425. Also, Transac- 
tions of Connecticut Academy of Sciences, Vol. V, 1878-82. 
TUNICATES. 
Sea-Squirt (Ciona intestinalis)—Castle, W. E., Bull. Mus. Comparative Zoology, 
Harvard, Vol. XXVIT, 1896. Willey A., Amphioxus and the Ancestry of the 
Vertebrates, 1894. 
