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Show 974 MR. F. A. BATHER ON UINTACRINUS. [Dec. 17, Cirrochrista cliaphana, Hmpsn. 111. Het. viii. p. 135, pi. 155. f. 11, belongs to the Pyraustince. Pelena unicolor, Moore, Lep. Ceyl. iii. p. 386, pi. 184. f. 16, belongs to the Hydrocampince. Taseopteryx sericea, Butl. Trans. Ent. Soc. 1883, p. 63, belongs the Deltoidince. Metothemma angulipennis, Butl. Trans. Ent. Soc. 1883, p. 62, belongs to the Deltoidince. „ acuminata, Butl. Trans. Ent. Soc. 1883, p. 62, belongs to the Deltoidince. striata, Butl. Trans. Ent. Soc. 1883, p. 63, belongs to the Deltoidince. Eromene vetustella, Wlk. xxxv. 1763, is a Nola. Crambus perspicuus, Wlk. Ent. v. 155. Type lost, description not recognizable. ADDENDUM (Feb. 18, 1896). SEDENIA, Guen. Delt. & Pyr. p. 249 (1854), before Eromene, from which it is distinguished by the abortion of the proboscis. SEDENIA CERVALIS, Guen. p. 250, pi. 3. f. 3 = fitonusalis, Wlk. xviii. 794, and fpictoalis, xix. 1016. Australia. SEDENIA RUPALIS, Guen. p. 250. Australia. ?5 6. On Uintacrinus: a Morphological Study. By F. A. BATHER, M.A.1 [Eeceived December 3, 1895.] (Plates LIV., IN., & LVI.) CONTENTS. 1. Introduction and History of Discovery, p. 974. 2. Morphological Description of Uintacrinus socialis, p. 978. 3. The Relations of Uintacrinus, p. 995. 4. Summary, p. 1002. 5. Tbe Literature of Uintacrinus, p. 1003. 6. Explanation of the Plates, p. 1004. 1. INTRODUCTION A N D HISTORY OF DISCOVERY. Among those extinct forms that have evoked the curiosity of naturalists, the peculiar unstalked crinoid Uintacrinus holds a foremost place. Not merely its rarity and its beauty have caused it to receive unusual attention, but also the circumstances that, though found in the Cretaceous rocks, it reminds one strongly of forms extinct since the Carboniferous period, and yet cannot be joined to them, so far as we are aware, by any chain of ancestors. Like the other unstalked and free-swimming crinoid of the Chalk, Marsupites testudinarius, it is a forlorn foundling, with not even birth-mark to reveal its parentage. The riddle with which Uintacrinus perpetually challenges the naturalist may perhaps be 1 Communicated by Sir W. H. FLOWER, K.O.B., P.Z.S. |