one wanting in the other group. page 128 On page 146 of the same word he thus amazingly described the species- "Koch. Char. - Orbed, orbicular, small, no cardinal area or delineation; spinal appendages very large, filling the greater part of the skull. This very interesting proof furnishes all the external characters of the Teretratulae due united to the internal structure of the fingers, to which latter family it truly belongs. Prof. Cuvier is the only author who has recognized the group; he from a part of his last observations of the same species, but gave no characters to distinguish it from Teretratula; the internal structure is, however, a sure guide. The above is all he wrote about it at that time. On page 147 in regard to Leconstrictus he said "that of. it and uncommon"