19. Echinoderms of Connecticut: by Wesley Roscoe Coe. 20. The Birds of Connecticut: by John Hall Sage and Louis Bennett Bishop, assisted by Walter Parks Bliss. 21. Fifth Biennial Report of the Commissioners of the State Geological and Natural History Survey, 1911-1912. 22. Guide to the Insects of Connecticut: prepared under the direction of Wilton Everett Britton. Part III. The Hymenoptera, or Wasp-like Insects, of Connecticut: by Henry Lorenz Viereck, with the collaboration of Alexander Dyer MacGillivray, Charles Thomas Brues, William Morton Wheeler, and Sievert Allen Rohwer. 23. Central Connecticut in the Geologic Past: by Joseph Barrell. 24. Triassic Life of the Connecticut Valley: by Richard Swann Lull. 25. Sixth Biennial Report of the Commissioners of the State Geological and Natural History Survey, 1913-1914. 26. The Arthrostraca of Connecticut: by Beverly Waugh Kunkel. 27. Seventh Biennial Report of the Commissioners of the State Geological and Natural History Survey, 1915-1916. 28. Eighth Biennial Report of the Commissioners of the State Geological and Natural History Survey, 1917-1918. 29. The Quaternary Geology of the New Haven Region, Connecticut: by Freeman Ward, Ph.D. 30. Drainage, Modification and Glaciation in the Danbury Region, Connecticut: by Ruth Sawyer Harvey, Ph.D. 31. Check List of the Insects of Connecticut: by Wilton Everett Britton, Ph.D. (In press.) Bulletins 1, 9, 12, 17, 21, 25, 27, and 28 are merely administrative reports containing no scientific matter. The other bulletins may be classified as follows: Geology: Bulletins 4, 6, 7, 8, 13, 18, 23, 24, 29, 36. Botany: Bulletins 3, 5, 10, 11, 14, 15. Zooelogy: Bulletins 2, 16, 19, 20, 22, 26, 31. These bulletins are sold and otherwise distributed by the State Librarian. Postage, when bulletins are sent by mail, is as follows: No. 1 $0.01 No. 13 $0.08 No. 23 $0.03 3 .08 14 .16 24 .10 4 .06 15 .06 25 .02 5 .03 16 .07 26 .06 7 .06 17 .02 27 .02 8 .05 18 .07 28 .02 9 .02 19 .08 29 .03 10 .08 20 .14 30 .03 11 .07 21 .02 31 12 .02 22 .08 The prices when the bulletins are sold are as follows, postpaid: No. 1 $0.05 No. 13 $0.40 No. 23 $0.15 3 .40 14 .75 24 .65 4 .30 15 .35 25 .05 5 .15 16 .35 26 .80 7 .60 17 .05 27 .05 8 .20 18 .25 28 .05 9 .05 19 .45 29 .50 10 .35 20 .50 30 .45 11 .30 21 .05 31 12 .05 22 2.00 A part of the edition of these Bulletins have been assembled in volumes substantially bound in cloth, plainly lettered, and sell for the following prices, postpaid: