NO. 2124. THE WEST AMERICAN SPECIES OF NUCELLA—DALL. 563 



and I have noticed in Alaska that the brownish-yellow groups of cap- 

 sules sometimes have a purphsh tinge. In the animals themselves 

 the secretion bears no comparison in amount or color with that 

 afforded by the tropical species, especially Patellipurpura. 



THAIS (NUCELLA) LAMELLOSA Gmelin. 

 Plate 74, figs. 5-8. 



Bucdnum pKcatum Martyn, Univ. Conch., 1784, fig. 44; not of Linnaeus, Syst. 



Nat., ed. 10, 1758, p. 735. 

 Bucdnum compositum Chemnitz, Conch. Cab., vol. 10, 1788, p. 179, vign. 21, 



figs, a, b (nomenclature not Linnean). 

 Bucdnum crispatum Chemnitz, Conch. Cab., vol. 11, 1795, pp. 70, 84, pi. 187, 



fig. 1802-1803, (nomenclature not Linnean). — Dillwyn, Recent Shells, vol. 



2, 1817, p. 613; not of Solander in Dillwyn, vol. 2, p. 707. 

 Bucdnum lamellosum Gmelin, Syst. Nat., vol. 7, 1792, p. 3498. — Dillwyn, Recent 

 - Shells, vol. 2, 1817, p. 612. 

 Bucdnum lamellosum Bolten, Mus. Bolt., ed. 1, 1798, p. 113, Nos. 1462-1463 (23); 



ed. 2, 1819, p. 80, Nos. 1435-1436 (23), pi. 1, fig. 4. 

 Polyplex rugosus Perry, Conch., 1811, pi. 9, fig. 2. 

 Murex crispatus Lamarck, Anim. a. Vert., vol. 7, 1822, p. 174; Encycl. Meth., 



1816, pi. 492, fig. 2; Deshayea' Lamarck, Anim. sans Vert., vol. 9, 1845, 



p. 576. 

 Murex ferrugineus Eschscholtz, Zool. Atlas, pt. 1, 1829, p. 10, pi. 9, figs. 2 A-B. 

 Murex lactuca Eschscholtz, Zool. Atlas, pt. 1, 1829, p. 11, pi. 9, figs. 3 A-B; not 



of Bolten, Mus. Bolt., 1798, p. 141, as Purpura {= Murex saxatilis Linnaeus, 



Syst. Nat., ed. 10, 1758, p. 747; .-{-Purpura saxatilis Meuschen, 1787). 

 Polytropa crispata Swainson, Malac, 1840, p. 305. 

 Purpura septentrionalis Reeve, Conch. Icon., vol. 3, 1846, Purpura, pi. 10, fig. 



50. — Middendorff, Beitr. Mai. Ross., vol. 2, 1849, p. 117. 

 Murex lactuca Middendorff, Beitr. Mai. Ross., vol. 2, 1849, p. 120, pi. 7, figs. 



1, 2.— Fischer in Pinart, Voy. Cote N. W. de I'Amer., 1875, p. 38, pi. E, 



figs. 4, 4a. 

 Purpura crispata Carpenter, Rep. Brit. Assoc, for 1863, p. 662, 1864 (Smith- 

 sonian reprint 1872, p. 148). — Arnold, Pal. San Pedro, 1903, p. 261. 

 Purpura plicata Martens, Mai. Blatt., vol. 19, 1872, p. 86. 

 Purpura lapillus var. crispata Tryon, Man., vol. 2, 1880, pp. 171-229, pi. 54, 



figs. 163-166. 

 Thais {Nucella) lamellosa Dall, Prof. Paper, No. 59, U. S. Geol. Survey, 1909, 



p. 80. 

 Thais plicata Vanatta, Nautilus, vol. 24, No. 4, 1910, p. 37. — Cooke, Proc. Mai. 



Soc, vol. 11, pt. 4, 1915, p. 203. 

 ? Purpura lapillus var. quillayutea Reagan, Trans. Kansas Acad. Sci., vol. 22, 



Geol. ser., 1909, p. 221, pi. 6, figs. a-b. 



Range.— Bering Strait at Port Clarence; south on the west to the 

 Japan Sea off Sado Island in 161 fathoms (dead); on the east to the 

 Aleutian Islands and to Cook's Inlet, Oregon, and Santa Barbara, Cali- 

 fornia. Pleistocene of California and Oregon. Pliocene of San Diego 

 and San Mateo Counties, California, and Clallam County, Washington. 



This species submits to such changes, incident to situs, that single 

 specimens, or even numerous specimens from single localities, might 

 weU be taken for different species, especially as specimens from a 



