240 REPORT OF THE 



131. TJnio phaseolus, Mild. 



132. <l rectus, Lam. 



133. " rubiginosus, Lea. 

 *134. " leprosus, Nobis. 



135. " subrotundus, Lea. 



136. " Schoolcraftensis, Lea. 



137. " spatulata, Lea. 



138. " subovatus, Lea. 



139. i l tenuissimus, Lea. 



140. " trigonus, Lea. 



141. " triangularis, Bar. 



142. " undulatus, Bar. 



143. " verrucosus, Bar. 



144. " ventricosus, Bar. 



145. Alasmodon rugosa, Bar. 



146. " marginata, Say. 



147. " deltoides, Lea. 

 x 148. Anodonta Benedictii, Lea. 



149. " cataracts, Say. 



150. " edentula, Lea. 



*110. U. cariosus. I give this species on the authority of Prof. Sager. 



*116. U. glans. This shell was found in the Clinton River, at Pontiac, Oakland county, by 

 Mr. John A. McNiel, an enthusifstic and indefatigable collector of shelis, residing at 

 Grand Eapids. 



»121. V. luteolus. This bivalve presents a great variety in form and appearance, and is 

 found in every part of the State. Among the collections are several well marked 

 varieties that may prove to be distinct species on further examination. 



*134. TJ. leprosus, nobis. Shell, thick, oblong, transverse, very inequilateral, compressed to- 

 wards the basal margin; posterior extremity rounded, nearer the basal than the dor- 

 sal margin; anterior extremity sub-truncate; beaks slightly elevated; anterior lunale 

 distinct, extending between the beaks; umhonal slope rounded, prominent; basal and 

 hinge margins nearly parallel; epidermis reddish brown, somewhat roughened by 

 the lines of growth; cardinal teeth massive, prominent; lateral teeth long, elevated, 

 slightly curved; nacre white iridescent, with dark blotches towards the beaks, rough- 

 ened by numerous pearlaceous tubercles; anterior cicatrices large, deep; posterior 

 cicatrices large, confluent, slightly impressed; dorsal cicatrices deeply impressed, sit- 

 uated in the shallow cavity of the beaks. Diam. 1.56. Length, 2.65. Breadth, 6, 

 Hab. Huron River Livingston county. 



*148. There are undoubtedly several additional species of the genus Anodonta, in the col- 

 lections already made, which have not been determined, some of which may prove to- 

 be undescribed. I am indebted to Mr. Cnrrier's cabinet for several species in the 

 caialogue of this genus. 



