156 PROCEEDINGS OF THE ACADEMY OF 



F. V. Haydex, M. D. Six species of fresh-water shells, from Ancient Lake 

 margins, Salt Lake, Utah. 



G. A. Lathrop. Five species of Helices from Tennessee. 



Isaac Lea. Types of Physa Carltoni and eight species of TJnio from Big Black 



River, Mis. 

 M. L. I, each. Pomaliopsis lapidaria, Say, from St. Louis, Mich. 



J. A. McNeil. Unio Macneilii and a species of Melarria. 



M. McDonald. Leucocheila fa/lax, Say, and Triodopsis introferens, Bland, from 



Lexington. 

 F B. Meek. Tiara humerosa, Meek, from Utah fossil. 



C. W. Peale. Specimens of Olandina. 



W. H. Pease. Melania Ka?iaiensis, Limnea rubella, Lea, L. turyidula. L. ambigua, 



and L. compacla. 

 J. S. Phillips. Two species of Marginella ; Aricia Scottii, Brod. ; Porccllana 



erythnrensis, Beck. 

 J. H. Redfield. Cyclophorus Kilagiricus, Benson ; fourteen species of Auricu- 



lidse, eight species of Ringicula, and nine species of Cylindrella. 

 S. R. Roberts. Helix alternata, Say, from Niagara Falls. 

 Rev. J. Rowell. Goniobasis circumliniata, Tryon, and a species of Physa. 

 W. S. W. Ruschexberger. Two specimens of Spondylus Delessertii, Chemn. r 



from Navigator's Island. 

 Mrs. Lucy W. Say. A unique rayed specimen of Unio cylindricus, Say, from 



the Wabash river. 

 John Wolf. Pleurocera Lewisii, and P. subulare, Lea, from Illinois River, Can- 

 ton, 111.: two species of Physa; two species of Limneidie; Amnicola parva, 



Lea, A. rustica, Say, and A. decisa, Haiti., from Illinois ; eleven species of 



Unionidu: and one of Sphs&rium from Canton, 111. 



The following were purchased with funds received from the sale of dupli- 

 cates : Cataulus h.-i'nastoma, from India ; Helix Skinneri, Reeve, from Ceylon ; 

 twenty-eight species operrulate land shells from West Inuies, new to collec- 

 tion, named by Thos. Bland, and six species of Cylindrella. 



A collection of one hundred and fifty-two species was sent to Sylvauus Han- 

 ley for shells received from him in 18G9. A similar collection was sent in ex- 

 change to Dr. J. C. Cox, of Sydney, N. S. W. 



Selections from the publications of the Section were sent in exchange to E. 

 A. Bielz, of Hermannstadt, F. de Malzine, of Bruxelles, E. von Martens, of Ber- 

 lin, M. Petit de la Saussaye, of Paris, W. H. Pease, of Honolulu, Paul Terver, 

 of Lyons, and Ralph Tate. 



In consequence of the comparative completeness of our collection in many 

 of the families, we have been forced to decline exchanging with foreign natu- 

 ralists, except when they are able to furnish us with specified desiderata. 



Through the liberality of Messrs. Jos. Jeanes, J. H. Redfield, Wm. L. Mac- 

 tier and W. S. Yaux, we have been enabled to place sixty-four drawers under 

 the horizontal cases. These drawers afford accommodations for the arrange- 

 ment of the fallowing families: the Poreellanidx, Cylindrellidiv, Cyclostomacea, 

 Auriculacea, the Helices, except the North American species, the Slugs, Vilrinte, 

 Succinex, and part of the Corbiculidzn. 



During the year, 10,060 shells have been cleansed, oiled, labelled and placed 

 in 3771 trays. Fifty beautiful sections, illustrating the genera arranged, have 

 been prepared by Dr. F. A. Hassler. 



Your Committee on the Arrangement of the Collection have met frequently 

 and devoted much time to the performance of the duty assigned them. They 

 have reason to refer with satisfaction to the above summary of the results of 

 their labors. 



All of which is respectfully submitted, 



Edward J. Nolan, Conservator. 



[Dec. 



