358 SMITHSONIAN MISCELLANEOUS COLLECTIONS [vo. 48 
ADELOMELON MAGELLANICA Lamarck 
Voluta magellanica CuEMNiItz, Conch. Cab., x, pp. 138-9, 1788, ex parte, 
pl. 148, figs. 1383, 1384. GMELIN, Syst. Nat., vi, p. 3465, no. 110, ex 
parte, 1792. — 
Voluta magellanica Lamarck, Ann. du Mus., xvu, p. 69, 1811; Encycl. 
Méth., pl. 385, figs. 1a, 1b, 1816; Animaux s. Vert, vu, p. 344, 1822; 
Woop, Ind. Test., ed. 1, p. Io1, pl. 21, fig. 168, 1825 (after Chemnitz 
and Lamarck). 
Voluta gracilis Woop, Ind. Test., Supple., pl. m1, Voluta, fig. 2, 1828; ed. 
Hanley, p. 200, pl. m1, fig. 2, 1856; (not Voluta gracilis Swanson, 
Journ. Sci., xvi, p. 32, Exotic Conch., pl. 43, 1821; nor of Gray, in 
Grifhth’s Cuvier, p. 601, pl. 40, fig. 4, 1834). 
Voluta ancilla KiENER, Icon. Cog. Viv., Voluta, p. 39 (pl. 52 by error, 
really pl. 51), 1839; not V. ancilla Lam. 
Voluta magellanica Goutp, Expedition Shells, Wilkes’ Exped., p. 278, pl. 
Xx, fig. 357, 1852 (animal fig’d). 
Voluta bracata RocCHEBRUNE AND MaBiLte, Miss. Cap Horn, p. 48, no. 72, 
1889. Identical with the preceding. 
Voluta ancilla Reeve, Conch. Icon., Voluta, pl. xvu, fig. 39, 1849; Tryon, 
Man. Conch., Iv, p. 97, pl. 29, fig. 110, 1882; not of Gould, 1852. 
Scaphella (Voluta) arnheimi Rivers, Proc. Cal. Acad. Sci., 2d Ser., 11, 
July 14, 1891. 
V oluta ancilla LAHILLE, Rev. Mus. de la Plata, vi, p. 311 (21 of extras), 
ex parte, pl. 1, figs. 9, 10; pl. 1, figs. 62, 63; pl. vim, figs. 159, 173 to 
183, 184 to 192, 1895; also var. typica LAHILLE, p. 312, pl. x1, fig. 5; 
vars. pondcrosa, elongata (pl. x1, fig. 2), inflata and (?) expansa 
LAHILLE, p. 313; and var. (?) abbreviata LAHILLE, p. 314, 1895; 
StrEBEL, Zool. Jahrb., xxIv, no. 2, p. 92, 1906. 
Voluta bracteata “ Rochebrune” StTREBEL, 1. c.=V. bracata RoCHEBRUNE 
ET MABILLE. 
Habitat—From about south latitude 43° on the Argentine coast 
south to the Straits of Magellan, from low-water mark to 77 fathoms ; 
usually on sandy bottom in which the animals burrow. Falkland 
Islands, Lively Island, York Bay and Port William. Burnt Island, 
Orange Harbor, on sandy bottom. 
If the name magellanica be retained at all for a species distinct 
from Solander’s lV. ancilla, it must be for the more slender elongate- 
spired form figured by Lamarck, who first clearly discriminated 
between the species confused by the earlier writers. Considering 
how badly the synonymy is mixed up, it might be best to discard the 
name magellanica entirely. In this case Rochebrune’s name of bra- 
cata is probably the earliest which could be used for the species. 
This name has been altered to bracteata by Strebel in his discussion 
of the species. 
The Scaphella Arnheimi Rivers was described from a specimen 
collected by the U. S. steamer Albatross in the Straits of Magellan, 
