. The geographical distribution of the family Charadriidae, or the plovers, sandpipers, snipes, and their allies . d basin albis ad rhachidem. Tringa ptilocnemis, Coues, Birds North- West, p. 491 (1874). Tringa gracilis, Harting, Proc. Zool. Soc. 1874, p. 242. Arquatella ptilocnemis (Coues), Ridgway, Bull Nutt. Orn. Club, 1880, p. 163. Plates.—None. Habits.—Baird, Brewer, & Bidgway, Water-Birds N. Amer. i. p. 222. Eggs.—Described by Brewer on page 224 of the above-mentioned volume as averaging slightlylarger than those of the typical form. The differences between the Prybilof Purple Sandpiper
. The geographical distribution of the family Charadriidae, or the plovers, sandpipers, snipes, and their allies . d basin albis ad rhachidem. Tringa ptilocnemis, Coues, Birds North- West, p. 491 (1874). Tringa gracilis, Harting, Proc. Zool. Soc. 1874, p. 242. Arquatella ptilocnemis (Coues), Ridgway, Bull Nutt. Orn. Club, 1880, p. 163. Plates.—None. Habits.—Baird, Brewer, & Bidgway, Water-Birds N. Amer. i. p. 222. Eggs.—Described by Brewer on page 224 of the above-mentioned volume as averaging slightlylarger than those of the typical form. The differences between the Prybilof Purple Sandpiper and the typical form havealready been pointed out. It is difficult to believe even in the subspecific distinctness of aPurple Sandpiper said to be isolated during the breeding-season on the Prybilof Islands,almost in the middle of the Behring Sea, and to wander in flocks during the rest of theyear as far as the Kurile Islands on the one side and the coast of Alaska on the a geographical anomaly can only be accepted provisionally pending furtherinformation. Diagnosis. Synonymy. %.** TRINGA ARENARIA. SANDERLING. Tringa halluce nullo. Diagnosis. 432 TRINGA. Variations. AiiTHOUGH the Sanderling is circumpolar in its range, it is not known to vary locally inany way. The variations due to season and age are fully described (Seebohm, BritishBirds, hi. p. 224). Newtons opinion (Ibis, 1859, p. 256) that American examples arelarger than ours must have been arrived at after the examination of too small a length of wing varies from 4*7 to 5-0 inch in both. Synonymy. Tringa calidris grisea minor, Brisson, Om. v. p. 236 (1760). Tringa arenaria, -» „, n . ,., . \Linneus, Si/st. Nat. i. pp. 251, 255 (1766). Lharadrms calidris, J * rr x Charadrius rubidus, Gmelin, Syst. Nat. i. p. 688 (1788). Arenaria vulgaris, Bechstein, Orn. Taschenb. p. 462 a (1803). Arenaria grisea, Bechstein, Naturg. Deutschl. iii. p. 368 (1809). Arenaria calidris (Linn.), Meyer,
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