115 



TABLE— Continued. 



44. GEN. LVCINA. 



117. L. mlumlata, Hall & Meek 



118. L. ocadentalis, Meek. & Hayden 



45. GEN. HETTAXGIA. 



119. //. Americana, Meek & Hayden 



46. GEN. CYPRINA. 



120. C. arenaria, Meek & Hayden . 



121. C. cordata. Meek & Hayden .. 

 C. compr&ssa, Meek & Hayden 



C. mala, Meek & Hayden 



C. subtumida, Meek & Hayden. 



122 

 123 

 124 



47. GEN. CARriOI. 



125. C. Sjjeciosim, Meek & Hayden 



48. GEN. NUCULA. 



126. y. 



127. N. 



128. N. 



129. .¥. 



130. X. 



131. N. 



132. y. 



133. y. 



134. N. 



sulnasida, Hall & Meek - - 



ventricosa, Hall & Meek 



scitula, Meek & Hayden 



Evansi, Meek & Hayden 



equilaieralis, Meek & Hayden 



subplana, Meek & Hayden 



cancellata, Meek & Hayden 



planorrutrginata , Meek & Hayden. 

 obsolelastriata, Meek & Hayden.. 



49. GEN. PECTUNCULUS. 



135. P. parvida, Meek & Hayden 



136. r. subimlricatus, Meek & Hayden 



50. GEN. CUCCLLEA. 



137. C. Nebrascenm, Owen 



138. C. cordata, Meek & Hayden ... 



139. C. Shumardi, Meek & Hayden 



140. C. ezigiut, Meek & Hayden 



51. GEN. MYTILUS. 



141. .1/. eittmuatus, Meek & Hayden 



142. i/. Galpinianus, Evans & Shiimard. 



143. M. subarciudus, Meek & Hayden . . . 



52. GEN. AVICULA. 



144. A. triangidark, Evans & Shumard... 



145. A. linguiformus, Evans & Shxnnard.. 



146. A. Haydmi, Hall & Meeli 



Formations in ascending 

 order. 



