Reports

Pectic Enzyme: An Elicitor of Necrosis in Cotton Inoculated with Bacteria

Ralph J. Venere

1-7

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Notes on Food Habits, Size and Spawning Behavior of Spotted Gar in Lake Lawtonka, Oklahoma

Jack D. Tyler

8-10

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Vegetational Changes in a Black Willow Forest Over a 23-Year Period

Forrest L. Johnson

pp. 11-13

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The Feeding Preferences of Tilapia aurea (Steindachner) for Five Aquatic Plants

D. P. Schwartz

14-16

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River Otters in Oklahoma

Richard T. Hatcher

17-19

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The Mussels (Unionaceae:Bivalvia) of Oklahoma—Part 3: Lampsilini

Branley A. Branson

20-36

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New Additions to the Diatom (Bacillariophyceae) Flora of Oklahoma

Michael T. Kennedy

37-39

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Metabolism of Nepetalactone and Related Compounds in Nepeta cataria L. and Components of its Bound Essential Oil

George R. Waller

49-56

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Seasonal Variation in the Phytoplankton and the Trophic State of a Southern Great Plains Reservoir

James C. Randolph

57-62

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Zooplankton and Benthic Microinvertebrates in Lake Carl Blackwell

Gregory L. Howick

63-65

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The pH of Rainfall in the Southern Plains

S. J. Smith

40-42

PDF

Notes

New Native Orchids for Oklahoma and Kansas

Lawrence K. Magrath

43-44

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The Occurrence of Notropis hubbsi in Oklahoma

Rudolph J. Miller

45

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Anomalies of Bobcat Skulls from Oklahoma

Mark A. Trail

46-47

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Red River Pupfish, Cyprinodon rubrofluviatilis (Fowler), in the Arkansas River Drainage in Western Oklahoma

Jimmie Pigg

48

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Award of Merit

Biographical Sketch, Benjamin J. Scherlag

66-67

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Academy Affairs

Officers 1983

68

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Financial Statement

69

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