141 



fusca, postice dilatata, sub-angulata ; umbonibus elevatis, una cum 

 latere postico corrugatis ; dentibus cardinalibus pyramidatis, late* 

 ralibus flexuosis : impressionibus musculorum profundis ; margarita 

 albido-incarnata. Long. 2 ; alt. 1 1-2 ; lat. 4-5 poll. 



Closely allied to U. corrugata, Lam., which is less rounded and 

 less corrugated. 



Unio CRisrATA. Testa ovali-elongata, inequilaterali, antice ro- 

 tundata, postice subrostrata, costaque umbonali ; umbonibus parvis ; 

 colore virescente, fusco variegata ; rugis angulatis radiantibus un- 

 dique crispata. : intus livida ; dentibus parvis obtusis. Long. 1 7-10 j 

 alt. 9-10; lat. 1-2 poll. 



Unio foliacea. Testa, parva, compressa, fragili, fusco-vires- 

 cente, inequilaterali, transverse oblongo-ovata, postice sub-angulata. ; 

 umbonibus parvis, subtilissime corrugatis ; dentibus exilibus, rectis, 

 ad marginem parallelis ; margarita livida, iridescente. Long. 1 3-5 ; 

 lat. 1-2; alt. 9-10 poll. 



Closely allied to U. Bengalensis and Corrianus Lea. 



Unio exolescens. Testa transverso-oblongata, inequilaterali, 

 sub-compressa, fusco-virescente ; postice dilatata, sub-biangulata ; 

 umbonibus sub-elevatis ; dentibus cardinalibus parvis, obliquis, inter- 

 dum exoletis ; lateralibus remotis, rectis; margarita livida vel fer- 

 ruginea. Long. 2 3-4 ; alt. 1 1-4; lat. 3-5 poll. 



In form and color resembles some stinted varieties of U. compla- 

 natus. 



Dr. J. B. S. Jackson stated that the female Chimpanzee, 

 which had lately been exhibited at the Boston Museum, 

 having died, the internal organs had been obtained for the 

 Society. 



ADDITIONS to the library. 



Linsley, J. H. Catalogue of the Birds of Connecticut. Pam. 

 8vo. Author. 



Proceedings of the Academy of Nat. Sciences, at Philadel- 

 phia. Nos. 26—29. 8vo. Pam. Academy of Natural Sci- 

 ences. 



