. Annual report of the regents of the university of the state of New York on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. Fig. 1. The dorsal valve of R. nigricans, a living species, showing the spiral appendages (or labial arms) : a, the adductor muscles; i, the 2. R. psittacea, ventral valve : /, foramen; d, deltidium; t, teeth; a, adductor; j>, pedicle muscles; r, cardinal muscles; o, ovarian 3. Dorsal valve : c, crural processes; t, sockets; a. adductor; s, septum. Figures 4 and 5 are illus
. Annual report of the regents of the university of the state of New York on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. Fig. 1. The dorsal valve of R. nigricans, a living species, showing the spiral appendages (or labial arms) : a, the adductor muscles; i, the 2. R. psittacea, ventral valve : /, foramen; d, deltidium; t, teeth; a, adductor; j>, pedicle muscles; r, cardinal muscles; o, ovarian 3. Dorsal valve : c, crural processes; t, sockets; a. adductor; s, septum. Figures 4 and 5 are illustrations of the ordinary form and appearane of Rhyn-ckonella psittacea, as it occurs in the modern tertiary deposits of the Fig. 4. Fig.
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectscience, bookyear1853
