16 CATALOGUE OF THE 



u^-Lingulella cineinnattensis, Hall & Whitfield. 



tOrthis sequivalvis, Hall. 

 t-XDrthis bellula, JamesA 

 LJtOrthis biforata, Schlotl\eim. 



Orthis biforata, var. acuminata, James, 

 i ^Orthis biforata, var. acutilirata, James. 

 Orthis biforata, var. anniana, James. 

 Orthis biforata, var. cypha, James. 



L ^Orthis biforata, var. dentata, Pander. 



Orthis biforata, var inflata, James. 

 *Orthis biforata, var. laticostata, James. 

 i__*Or this biforata, var. lynx, Von Buch. 



Orthis biforata, var. profundo-sulcata, Owen. 

 *Orthis borealis, Billings. 

 Orthis clytie, Hall. 

 Orthis centrilineata, Hall. 

 Orthis cincinnatiensis, Ulrich. 

 Orthis crassa, James. 

 *Orthis eye) us, James. 

 Orthis dichotoma, Hall. 

 Orthis disparilis, Conrad. 

 l__^Orthis ella, Hall. 



*Orthis emacerata, Hall. 

 Orthis emacerata, var. meeki, S. A. Miller. 

 Orthis erratica, Hall. 

 L-^Orthis fissicosta, Hall. 

 I^JM3rthis insculpta, Hall. 



I Drthis jamesi, Hall. 



*Orthis linneyi, James. 

 Orthis merope, Billings. 

 Orthis morrowensis, James. 

 *Orthis multisecta, James. 

 *Orthis neglecta, James. 

 uJtOrthis occidentalis, Hall. 

 Orthis orthambonites, Pander. 

 Orthis pectinella, Conrad. 

 Orthis pectinella, var. semiovalis, Hall. 



