GASTEROPODA. 267 
Figure 334, the animal, with the shell. 
The animal of the genus Nassa may be described as follows: 
Foot elongated, narrowing somewhat backwards, bifid at the tip, 
and bearing on each of the points an erect cirrhus; anterior angles 
very much elongated ; head small, tentacles long, and very slender 
beyond the eyes, which are at their lower third; siphon very long, 
Margin of the operculum serrated. 
CoLUMBELLA GAuSaPATa (Gould). 
T. parva, solidula, elongata, ovato-conica, ad basim spiraliter striata, 
sub epidermide rudi subrufo concinné rufo-reticulata vel variemodé 
maculata aut fasciata: spira conico-turrita, anfractibus sex ad septem 
convexiusculis, ultimo trientes duos longitudinis testa, anticée subito in 
rostrum brevem angustato ; sutura valde impressa: apertura angusta 
lunata ; labro simplict, rufo, intus sparsé denticulato. 
Columbella gausapata, Goutp ; Proceed. Boston Soc. Nat. Hist., iii. 
170. January 1850. Expedition Shells, 71. 
SHELL small, solid, ovate-turreted, elongated, without striation 
except a few lines around the beak, smooth, polished, covered with a 
dense russet-coloured epidermis, having indistinct, paler maculations 
beneath. Whorls six or seven, nearly flat, the last less than two- 
thirds the whole length, abruptly sloping to the beak, which is short; 
suture linear, abrupt, deeply impressed ; aperture one-third the leneth 
of the shell, narrow-lunate ; lip simple, with a few rib teeth within, both 
margins deep purplish-brown ; callus on the pillar not abundant; inte- 
rior pale-lilac. 
Length half an inch; breadth one-fifth of an inch, 
Inhabits Puget Sound, Oregon. 
This is an inelegant, very simple species, allied to C. unicolor, and 
C. castanea. It is more slender and less ventricose than the latter ; 
the aperture is more narrow, less deep brown, rather a yellow; and 
its burrowing suture, and rough, woolly epidermis, are sufficiently 
