42 



cular impressions ; thighs more or less rufous at base ; a white 

 membrane between the joints. Feet, 4. 1. 3 = 2. Alabama. 



M. solstitialis. Deep black ; cephalothorax with two indenta- 

 tions, cheliceres moderately large ; abdomen with several impres- 

 sions above, and 4 yellow spots underneath ; membrane between 

 the joints white ; third pair of legs with the third joint short and 

 crooked ; feet hairy, 4. 1.2. 4. Alabama. 



M. Carolinensis. Brownish, very glossy ; cephalothorax with 

 two slight impressions near the base ; abdomen blackish, not glossy ; 

 third joint of the third pair of legs very short and crooked ; feet 

 4. 1 = 3 = 2. N. Carolina. 



M. gracilis. Rufous ; cephalothorax somewhat six sided, long 

 and narrow ; abdomen plumbeous, two nipples very long ; feet long, 

 hairy, penultimate joint of the anterior pair with a notch; feet 4. 1. 

 2. 3. Alabama. 



M. unicolor. Deep rufous ; cephalothorax deepened in the mid- 

 dle, with two impressions, cheliceres very large ; abdomen smooth ; 

 third pair of legs with short, very thick joints ; feet 4. 1. 2. 3. Ala- 

 bama. 



Professor W. R. Johnson presented to the Society a num- 

 ber of minerals and fossils from the coal regions of Penn- 

 sylvania, as Juglandites, Stigmaria Jicoides, PhiloUtJius 

 imbricatuSj Catamites cannceformis, Lepidodendron obova- 

 tum. 



A species of Agama from Texas, not before in our collec- 

 tion, was presented by Mr. Thomas A. Holt through Dr. 

 C. T. Jackson. 



DONATIONS TO THE LIBRARY. 



A Selection of the Birds of Brazil and Mexico, the Drawings by 

 Wm. Swainson. 8vo. Lond. 1841. 



History of British Starfishes, by Edward Forbes. 8vo. Lond. 

 1841. 



British Oology, by Wm. C. Hewitson. 8vo. Newcastle on Tyne. 

 Audubon Fund. 



Proceedings of the Philadelphia Academy of Natural Sciences, 

 No. 5. From the Academy. 



Report on the Fauna of Ireland, div. Vertebrata. By Wm. 

 Thompson. 8vo. Lond. 1841. The Author. 



