﻿May, 1S57.] 



ELLIOTT SOCIETY. 



221 



Fig. 3. — Persa incolorata. — The sexual organ at the right of the digestive trunk 

 was abnormal in form. Only three of the labial tentacula are represented. 



Fig. 4 to 5. — Cunina octonaria — full grown ; much magnified. 



Fig. 4. — Yiewed from above. On the outer edge of each muscular lobe, are seen 

 the three sense-capsules a. Within and above them, are the three corres- 

 ponding fleshy tubercles, b. 



Fig. 5. — Viewed in profile. 



MAY 1st, 1857. 



President Lewis R. Gibbes in the chair. 



Prof. Gibbes exhibited a specimen of Epidendron conopse- 

 um, from the neighborhood of Georgetown, So. Ca., the most 

 northern locality in which it has been found. It was there 

 noticed by Dr. A. M. Forster. Prof. Gibbes also exhibited a 

 specimen of Ophisaurus ventralis, and a copy of the Musci 

 Exsiccati of Sullivant and Lesquereux recently issued, and 

 just received by him. 



Contributions to the Library. 



M. L. A. Huguet Latour presented Reports of the Su- 

 perintendent of Education for Lower Canada, 1850-1855. 



An Act to provide for the better organization of Agricultural 

 Societies in Lower Canada. 



Dr. Isaac Lea, Philadelphia, presented 



Rectification of Mr. T. A. Conrad's Synopsis of the family 

 Naiades of North America. 



On the new Red Sandstone formation of Pennsylvania. 



Description of a new sub-genus of Naiades. 



Description of a new species of Triquetra. 



Description of new fresh water shells from California. 



Description of twenty-five new species of Exotic Union es. 



Lieut. Maury presented Astronomical Observations United 

 States Naval Observatory, Washington, D. C. 



Academy of Natural Sciences, Philadelphia. Proceedings 

 September, 1856, to January, 1857. 



