548 PROCEEDINGS OF THE NATIONAL MUSEUM. voi,.xxiv. 
14 to 20 sharp laminose varices, more or less angular and rarely 
spinose at the shoulder; there is a marked descent from the suture to 
the shoulder in typical examples. The shell is usually tinely spirally 
striated and has about five whorls and an average length of 30 mm. 
This somewhat resembles small specimens of B. dalll^ but with care 
is easily discriminated, especially ])y its more fusiform outline. 
A variety cyiiiatus has the angle obsolete and the whorls rounded; 
it was dredged in 71 fathoms west of the Pribilof Islands, Bering Sea, 
by the U. S. Fish Commission steamer Albatross. U.S.N.M., 109091. 
BOREOTROPHON DALLI Kobelt. 
This is the Fusus lamellosus Gray, 1839, the Troplum muridforniis 
Dall, 1877, and the Trophon dalll of Kobelt, 1878. In 1880 Sowerby 
figured it under the name of Trophon gooderichi^ having found it in 
the British Museum labeled T. (joodrldgei by Forbes, a name unpub- 
lished. He also confounded it with T. coronatus A. Adams, a much 
smaller species. It is not the Trophon mariciformls of King, 1831, 
nor the T lamellosus of Gmelin. The present species has been 
figured.^ 
The distribution of this shell is known to extend from Cape Frank- 
lin in the Arctic Ocean south through Bering Sea and into the Pacific, 
where it has been dredged to the eastward of Sannak reefs, in 32 to 71 
fathoms by the U. S. Fish Commission steamer Albatross. 
A variety with the spines obsolete, the shoulder of the shell sloping, 
and the canal short is the original of Gray's F. laineUosus. There is 
one in the National Museum from which his figure might have been 
drawn. 
Another variety, alius., has the spire exceptionally elevated. 
The chief peculiarity of this species, apart from its muricoid form, 
is the appearance of the spines on the shoulder, which vary in number 
from 15 to 21, and which often have an appearance as if they were 
independent of the varices and had been separately stuck on to the 
whorl. 
There are usually five whorls, exclusive of the nucleus, and full- 
grown specimens reach about 60 mm. in length. The spire and long 
canal are frequently distorted, and the aperture, usually white, is 
sometimes internally tinged with yellow. 
Section AUSTROTROPHON Dali, 1902. 
TROPHON TRIANGULATUS Carpenter. 
This shell was named by Carpenter in 1863, and more fully described 
from a very young specimen in 1865. Later Mrs. Oldroyd and Miss 
Hale discovered the adult at San Pedro, and after a careful study of 
^New edition of the Conchy lien Cabinet, Fusus, pi. cxxiv, tig. 1, and also in the 
Proc. U. S. Nat. Mus., IX, 1886, pi. iv, flg. 6. 
