








214 SHELL DREDGING.  . 
and Bela turricula (Fig. 8) is thin and pure white. Trito- 
nium pygmeum (Fig. 14) is yellowish white. Admete viri- - 
dula (Fig. 15) is white. Trichotropis borealis (Fig. 21) is 
yellowish in color. Aporrhais occidentalis (Fig. 19) is one - 
of the most singular shells that we have. It is rare on our- 
coast, but is common towards Newfoundland. 
We must bear in mind that the species mentioned are a 
few among the many that most likely will be collected in 
dredging on our coast, 







Dredge. 


EXPLANATION OF PLATE I 
Fig. 1. Chiton albus Linn. Fig. 18 aiia Gouldii Phil.* 
: i inn.* . Aporrhais occidentalis Beck. 



