244 



EXPLANATION OF PLATE 23 



Figure Page 



149. Melanella conoidea (Kurtz and Stimpson) 116 



150. 3Ielanella iiitennedia (Cantraine) 116 



151. 3relanella bilineata (Alder) 116 



152. Melanella hemphilli (Dall) 117 



153. iVlso iiitemipta (Sowerby) 117 



154. Pjramidella crenulata (Holmes) 118 



155. Turbonilla dalli Bush 119 



156. Turbonilla hemplillll Bush 119 



157. Turbonilla conradl Bush 119 



158. Turbonilla punieea Dall 120 



159. Turbonilla ineisa constricta Bush 120 



160. Peristichia toreta Dall 120 



161. Odostoniia bisutiiralis Say 121 



162. Odostoniia impressa Say 122 



163. Odostoniia trifida Totten 122 



164. Odostoniia seniinuda (C. B. Adams) 122 



