LIST OF ILLUSTRATIONS. 



Page. 

 Plate 1.— (1) Outline of adult Menhaden as feeding. (2) Gill-arches with Branchi® and Gill-rakers attached, 



removed from fish and arranged in order 126 



2.— (3) Six of a series of Gill-rakers attached to the Gill-arch, showing the projecting rows of hooks. (4) Six 



of the hooks attached to the Gill-raker. (5) Diagram of Gill-rakers in cross-section. (C) Organisms 



from stomach of young Menhaden 126 



3. (7) Organisms filtered from surface waters of the Acushnet River. (8) Organisms from the stomach of a 



Menhaden 126 



4. — (9) Organisms from stomach of Menhaden taken in Quisset Harbor. (10) Organisms from Menhaden's 



stomach - 126 



5. — (11) Organisms from food in Menhaden's stomach. (12) Organisms filtered from the surface waters of 



Buzzards Bay 126 



6. — (13) Organisms filtered from the surface of Lagoon Pond. (14) Organisms from the stomach of a young 



Menhaden 126 



7. — (15) Organisms filtered from surface waters of Vineyard Sound upon a bright, clear morning. (1G) Some 



of the organisms found in the stomachs of Menhaden in the Acushnet River ..■- 126 



8.— (17) Outline of an adult Menhaden living in Buzzards Bay. (18) Outline of an adult Menhaden living in 



the extreme upper part of Waquoit Bay 126 



9.— Sketch Map of Lake St. Clair and Vicinity 127 



10. — (1) Vertical Net ready for use. (2) The Bucket removed from the Net and shown on a larger scale. 



(3) One of the Tubes containing Plankton 137 



11. — Catfish (Ameiurus albidiu) infested with Ichthyophthirius multifiliis 173 



12. — Ichthyophthirius imdtifiliis in different stages, Figs. 1 to 9 182 



Figure in Text : Diagram of Floating Case used in Sturgeon Hatching 337 



13.— Ardglass Herring Fishery. " Hauling Out." The larger class of Mackerel Boats 360 



14. — South Isles of Aran Islanders rowing a Canvas Currach 360 



15. — Donegal Canvas Currachs, Rosapenta 360 



16. — Carrying a Donegal Currach 360 



17.— (1) Herring and Smelt Bake used by Indians of Puget Sound. (2) Wire Jigger attached to Fish 



Line. ( 3) Fish-line Jigger 376 



18.— Colored illustration of Fresh-water Pearls from Tennessee, Gray and Black Pearls from Lower California, 



and Clam Pearls from Long Island Sound 439 



19. — Objects in Silver in which some part of the figure is made of a large oriental Baroque Pearl 458 



20. — Sardonyx Helmet Shell representing the Landing of Columbus 458 



21. — Sardonyx Helmet Shell, reverse, Portrait of Columbus 458 



22.— (1) Tabernacle Door. (2) Mandolin 458 



23.— (1) Oak Screen inlaid with Mother-of-Pearl. (2) Old Wood Chest inlaid with Mother-of-Pearl, Damascus. 458 

 24.— Front of.Mensa; Mother-of-Pearl used in upper border line and in circles on right; Groundwork aMosaic 



of Mexican Onyx, colored and avanturine glass 458 



25. — Silver Reliquaire, Rococo style, Bohemian work of the seventeenth century 458 



26 Grand Piano, a study of the old Spanish method of inlaying Mother-of-Pearl with Tortoise Shell and col- 

 ored woods in a hard wood 458 



27. — Russian Icon, Triptych of Virgin and Child, made about 1640 458 



28. — Sterling Silver Teapot, gilt incrusted with Baroque Pearls from the rivers of Tennessee 458 



29. — Pearl Oyster (Meleagrina margaritifera) 458 



30. — (1) Pearl Oyster Shells with Coral growths. (2) Tregonla peclencnsis, Australia 458 



31. — Tiffany-Higinbotham Collection 458 



32. — Meleagrina margaritifera with included Parasitic Fishes 458 



33.— (a) Pearly Knob (Meleagrina margaritifera), Thursday Island, Tahiti. (6) Mother-of-Pearl Shell, with 



Pearly Knob with monkey-like ia,ce 458 



34. — Pearl Oyster, one valve showing two ingrown Pearls and four places where pearls had been attached 458 



35.— Fresh- Water Mussel, TTnio with deep purplish-red interior, from Sugar River, Wisconsin 458 



36. — Unio, deep purplish-red interior 458 



37 Pair of Large Shells, Mother-of-Pearl 458 



38. — Abalone Shell, Pearlaceous Growth resembling camel's head 458 



39. — Pearl Oyster, showing borings which the shell has covered 458 



40.— (1) Dipsas plicatus, interior and exterior, interior containing tinfoil figures of Buddha. (2) Diptas plica- 



tus containing three strings of Beads, with a pearlaceous coating 458 



41. — Fresh-Water Mussel, showing Tearl included between Mantle and Shell, from Bohemia 458 



VII 



