. Smithsonian miscellaneous collections . DIELASMA, SPIRIFERELLINA, AND HETERELASMA(SEE EXPLANATION OF PLATES AT END OF TEXT.) MITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 119. NO. 2. PL. 23. HETERELASMA, GLOSSOTHYROPSIS, LOPHOPHYLLIDIUM. NUCULANA. AND SPONGE(SEE EXPLANATION OF PLATES AT END OF TEXT.) SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 119. NO. 2. PL.

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