"EXPLICATIO FiGURARUM. 



Tab. II. Fig-. 1, a, Okthis zonata, valva major, retusa; b, eadem, valva minor; c, d, e, eadem species a 



basi et a lateralibus visa. 

 Fig. 2, Orthis caliactis a. 

 Fig-. 3, a, b, c. d : Ortuis calligramma. 



Fig. 4, a, b, c, d, Ortuks testiidiiiaria ; — 4, e : sulci cum striis, magn. aiict. 

 Fig. 5, a, b, c, d, e : Orthis basalis 

 Fig. 6, a, b, c, d : Okthis elegantula; — 6, e : hujus speciei valva major intue visa; 6, f: valva 



minoi- inlus visa ; g, valva minor a basi visa, ut reprsesententur denies cardiuales. 

 Fig. 7, a, 1), c, d : Orthis demissa." 



