44 THE NAUTILUS. SOME NAMES WHICH MUST BE DISCAEDED. BY WM. H. DALL. Iii January, 1853, Gray (Brit. Mus. Cat. Brach., p. 114) insti-tuted the genus Gistella for Terebratula cuneata of Risso and allied forms. This name has been generally adopted and, in the last re-vision of the Brachiopods by Schuchert, is not credited with any synonyms. But in 1848, Gistel, in his Naturgeschichte des Thier-reichs, p. xi, proposed the name Oistella for a group of Insects. For the Brachiopod, therefore, I propose the name Aryyrotheca, with the same type. The name Euryla was proposed for a subgenus of Terebra, by H. and A. Adams in 1858, and is in general use, but Euryta had already been used for an acaleph by Gistel, in 1848, and must therefore be rejected. In its place I would propose Mazatlania. In 1876 Jef-freys proposed Glomus for a remarkable bivalve allied to Leda, but he had also been preceded by Gistel, who had proposed the name Glomus for a beetle (Naturg. p. xi, 1848). The genus may take the name of Pristigloma, The dismemberment of the heterogeneous Linnean genus Patella was one of the first tasks of naturalists after the publication of the Systema Naturas. The first author to undertake this necessary work has been generally overlooked. This was Modeer, who in 1793 (K. vetensk. Akad. nya Handl. xiv, pp. 110-111) divided the true limpets from those with internal septa or processes and gave to the latter group, with a proper diagnosis, the name of Gheilea. This group was subsequently divided by authors who, however, omitted to reserve any portion of the original genus Gheilea to preserve the name, as required -by the. rules of nomenclature. On the five species cited as examples by Modeer, four genera were instituted by Hum-phrey (after Hwass) in 1797, two belonging to his genus Crypta, more generally known as Grepidula. In 1799 Lamarck made two subdivisions with new names for three of the species, and added a third in 1809. Ferussac added a synonym to one of Humphrey's names in 1807, and Schumacher did the same in 1817, while a subgeneric name was proposed by Morch, for one of the two Crepidulas, in 1852. What name must we now reject, to reinstate
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