194 WEST AMERICAN SHELLS ; 
Boreotrophon scitulus, Dall, 
the Elegant Trophon, Figure 
200, is a type of a large num- 
ber of species which live mostly 
in northern waters, and 
which have been assigned to 
this genus. It is a little shell, 
only 17.5mm. in length but is 
supplied with an abundance of 
frills, as shown in the picture. 
It was first found in Bering 
Sea, but like many other of the 
cold water shells it probably pe te 
exists in deep water as far south as the Santa 
Barbara Islands. . 
Boreotrophon stuarti, K. A. Smith, Stuart’s 
Trophon, (Trophon orpheus). This fine shell has 
from seven to twelve varices, with the interspaces 
erossed by four or five rounded spiral cords. It 
sometimes reaches a length of two inches. The 
sharp, white varices make a crown at the suture. 
It ranges from Alaska to Santa Cruz, seeking 
deeper water as it comes southward, doubtless be- 
cause the deep water is colder and more like its 
arctic home. 
Boreotrophon gracilis, Perry, the Graceful 
Trophon, (T. multicostatus). This northern spe- 
cies has a pear-shaped shell, with several sharp, 
frill-like varices. The sutures are deep and the 
few whorls of the spire are very distinct. The 
color in small specimens is generally white, though 
often the interior is somewhat brown. It reaches 
