DALL | REVIEW OF AMERICAN VOLUTIDZ. 359 
at station 2778, in 61 fathoms, where a very large number were 
obtained. This specimen fell into ignorant hands and Mr. Rivers 
was erroneously informed that it came from Monterey Bay, Cali- 
fornia, which was the false locality with which Mr. Arnheim re- 
ceived it. It was an immature shell which I examined carefully 
and of which I possess a good drawing, thanks to Mr. Rivers. The 
type was destroyed after the earthquake in San Francisco, by fire, 
but a cotype, exactly similar, is in the National Museum, No. 102,530. 
Of the names used by Lahille for varieties of magellanica, pon- 
derosa is preoccupied in Voluta by Dillwyn (after Solander) 1817; 
elongata by Swainson in 1821; and inflata by Zekeli,in 1852. From 
figures alone, I feel unable to express a positive opinion as to the 
validity of these varieties or mutations. The animal of this species 
is carefully figured in the atlas of the Wilkes’ exploring expedition. 
The original specimen from which the figure was made is No. 5752 
in the National collection. A specimen was dredged by the U. S. 
steamer Albatross off Bahia Blanco, Argentina, at station 2767, in 
52 fathoms, sand; U. S. Nat. Mus., 87,540. 
A series of some thirty-two specimens from the Straits of Magel- 
lan illustrates the species in the National Museum. 
The ovicapsule, which occurred on valves of Pecten and other 
bivalves, was described by Duhaut-Cilly in 1840,t and has been 
figured by Dall, with the enclosed nepionic shell, in the Proceedings 
of the National Museum for 1889.” 
ADELOMELON ORNATA (Lahille) 
Voluta fusiformis ornata LAHILLE, Rev. Mus. de la Plata, v1, p. 299 
(extras, p. 9), pl. Iv, figs. 24, 25, 26, 1895; not pl. 111, figs. 16, 17.. 
Habitat—Coast of Argentina near the La Plata estuary. This 
fine species has little in common with l’. beckit Broderip, to which 
it is referred by Lahille as a variety, except the zigzag vertical 
streaks of brownish coloration. By its large blunt nucleus, solid 
shell, strong spiral striation and general form, it seems amply worthy 
of specific distinction. According to Lahille it attains a length of 
23 centimeters. There are two clean-cut plaits behind the one which 
_ forms the edge of the pillar. A specimen four and a quarter inches 
long has four whorls beside the large irregularly coiled nepionic 
nucleus. In lV. beckw the nucleus is small, the spire subacute, the 
shell rather thin for its size, recalling ancilla, the plaits behind the 
edge of the pillar are ill-defined, and the central portion of the pillar 
*Revue Zool. Soc. Cuvier., 1840, pp. 167-9. 
"Plate 1X, figs. 5, 6. 
