Sardes on Collection Orthus futilis, extremely fine striae, scarcely visible with a lens. x Orthus perradi, dorsal valve tends to be more convex than the ventral. x Orthus emacrata, slims, fasciculate grapey y flications distinct outline. Orthus terea, very convex at back of ventral valve; very short hinge- line; faint small striae [illegible] x Orthus ignota has double plication at back, sinuos in front, resemble weeki. x Orthus copulenta, alternating plica- tions as they come in convex brachial valve, x Orthus argata, medium plications, plications come in symmetri- cally on two sides y media plication, Chas B Cleavy Mar. Ago. 2022 Park Ave, Chicago Ave Car. n 6th St. Sardes on Collection 1 Plect ant no [illegible] small, convex, get size with age. 2. Plect. plication strongly convex, especially at midr. 3. Plect. recedens, quadranigulara, and long tends to have a flat backy 2 plicae 4 Plect. Oaxea broader or flatter. 5 Plect. services Brickyard, Twin City! Near Pi [illegible] Lake Minneapolis - St Paul street car transfer Wabasha + West St Paul, to Charles Heights gor to end of line, in county line. Or straight W until road bends, then to R down the ravine. New Palad. 4 street