MARINE UNIVALVES 179 
Tritonofusus rectirostris, Cpr., 
the Straight-beaked Spindle-shell, 
Figure 176. The picture is con- 
siderably magnified, but it repre- 
sents the features of the shell 
very closely. The shell itself is 
white, but it has a polished, olive- 
brown epidermis. It lives in the 
waters of Puget Sound and 
vicinity. 
Tritonofusus herendeéni, Dall, 
the Nine-whorled Spindle-shell, 
Figure 177. This species is an 
inhabitant of more northern 
waters, having been obtained at 
various places in the far north, 
and it grows to a length of 70 
mm. The shell has about nine 
whorls, and its color is pinkish 
white with a yellowish tinge be- 
neath, and over all is a pale olive 
periostracum. There are several 
other species of this genus, which 
will be duly mentioned in the 
List. 
In Figure 178 we have a nat- 
ural sized picture of the little 
Macron lividus, A. Ad., the Livid 
Macron. The shell is brown in 
eolor, and when found living it 
will be noticed that it is covered Fig. 177, x 3) 
Tie 
Fig. 176, x 2 (#) 
