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Show 268 MESSRS. SCLATER AND SALVIN ON THE [Feb. 15, coloration he gives is that of H. bitaniata, Cox, also from South Australia, and persists in regarding the normal state of H. anga-siana as " solid, white, and porcellaneous," and furthermore gives " H. angasiana, not Pfeiffer," as synonym of H bitaniata, Cox, in his • Monograph.' The coloration of //. angasiana, when fresh, is singularly like that of H. bitaniata, although the form and characters of the two species are extremely different. I have therefore given a figure of both the species on the accompanying plate, which ought to set the matter definitively at rest. I may add that H. bitaniata, Cox (1868), is a synonym of H. flindersi, A. Ad. & Ang., (P. Z. S. 1863), the description of which was unfortunately also taken from a bleached specimen from which the bands had disappeared. The shell described and figured as H. angasiana by Dr. Newcomb in the 'Annals of the Lyceum of Natural History of N e w York,' in May 1860, must stand as H. bougainvillei, it having been described and figured under the latter name by Dr. Pfeiffer in the ' Proceedings' of this Society in February 1860 (see P. Z. S. 1860, p. 133). EXPLANATION OF PLATE XX. Figs. 1-5. Helix beatrix. Figs. 10, 11, 12 Helix rhoda. Figs. 6, 7. Helix ramsdeni. Figs. 13, 14. Helix angasiana. Figs. 8, 9. Helix moresbyi. Figs. 15, 16. Helix biteeniata. 3. Notes on some of the Blue Crows of America. By P. L. SCLATER, M.A., Ph.D., F.R.S., and OSBERT SALVIN, M.A., F.R.S. [Received January 9, 1875.] The typical Crows (Corvus) are, as is well known to naturalists, in the N e w World essentially a northern form, and have only penetrated into the Neotropical Region as far south as the highlands of Guatemala and the northern Antilles. Several genera of Blue Crows take their place in Central and Southern America. Of these, in our ' Nomenclator,' we enumerated 32 species as autoptically known to us. But during the past three years the receipt of additional specimens and examination of others in different collections has enabled us to add slightly to the number, and to make certain rectifications in our own list. These we beg leave to submit to the Society. 1. CYANOCITTA* ARGENTIGULA. C. argentigula, Lawr. Ann. Lye. N. Y. xi. p. 88 (1875). Under this name Mr. Lawrence has recently described a Jay from Costa Rica with which we are not yet autoptically acquainted.' It is apparently a well-defined species, belonging to the group containing * The type of the genus Cyanocitta of Strickland is Garrulus cristatus, Linn., as stated in precise terms by the founder of the genus (Ann. Nat. Hist. xv. p. 261, 1845); and we therefore cannot understand why the authors of' North American Birds' and other American writers persist in giving tbe type as Garrulus |