DALL] REVIEW OF AMERICAN VOLUTIDZ&. an7 
Voluta magellanica (REEVE) StreBEL, Zool. Jahrb., xxiv, no. 2, p. 127, 
pl. vu, figs. 17-24, 26-32; pl. 1x, figs. 36, 41; pl. to, figs. 53, 54, 58, 
1900. 
Hab. Argentine coast, near the mouth of the Rio La Plata, from 
low water to ten fathoms, burrowing in sandy bottom; south to 
Magellan Straits (Punta Arenas, etc.),and Woodcock Island, Tierra 
del Fuego; Falkland Islands at Port Stanley. 
This species is not represented in the National Museum. 
ADELOMELON BENTHALIS Dall 
Scaphella benthalis Dati, Proc. U. S. N. Mus., xviir, no. 1034, p. 13, 1895. 
Gulf of Panama, at station 3360, in 1672 fathoms (3087 meters), 
sandy bottom ; dredged by the U. S. steamer Albatross. 
WS. Nat. Mus., 122,908: 
This species, notwithstanding the type specimen is decorticated, 
seems sufficiently distinct in form to be separated specifically from 
the southern congeners. The whorls are rounder, more nearly tabu- 
late in front of the suture, and with a more rapidly tapering and 
acute spire. 
ADELOMELON MARTENSI Strebel 
Voluta martensi STREBEL, Zool. Jahrb., XxXIv, no. 2, p. 124, pl. 1x, figs. 34,, 
35, 42-44; pl. x, figs. 56, 56a, 1906. 
“Peru” Coll. Godeffroy, in Hamburg Museum; Huelmo, Chile, 
near Puerto Montt, about south latitude 42°, near extreme low 
water, Coll. Dunker; Argentina, somewhat south of the estuary of 
Rio La Plata, 184 miles southeast of Cape Corrientes in 100 fathoms, 
Strebel ; east-northeast of Cape Delgado (south latitude about 43°), 
Argentina, in 48 fathoms, sand; U. S. S. Albatross (young shells). 
I have not seen the above species in the adult state, which, by 
Strebel’s rather rude figures, would seem to be very similar to a 
well preserved somewhat thin and inflated form of A. magellanica. 
In the absence of adult specimens for comparison it would be rash 
to venture upon any positive expression of opinion in regard to its 
relations, but it may be observed that the spiral striation of the 
nepionic whorls is quite variable and, in the majority of specimens 
of magellanica which I have seen, these whorls have been more or 
less decorticated so as to appear smoother and more slender than 
they were originally. It is very unlikely that either species has 
been collected on the Peruvian coast, and the Godeffroy label was 
perhaps conjectural. The young specimens which agree with 
Strebel’s figure bear the number 96,177 in the U. S. Nat. Mus. 
