MUSSEES AND, PECTENS 37 
times in rocks and sometimes in old shells. It has 
a light brown epidermis, and is an inch or two 
in length. 
Modiolaria taylori, Dall, Taylor’s Modiolaria, 
has a little shell, hardly a quarter of an inch long, 
shaped like a true Modiolus. It has a greenish 
epidermis, with dark purple nacre shining 
through. It was found in tide-pools at Victoria, 
ibe Cs, by Rev. G. W. Taylor: 
Modiolaria vernicosa, Midd., the Varnished Mo- 
diolaria has an oval shell, with beaks near one 
end. It is smooth, reddish brown, and has a bril- 
liantly polished epidermis. Its length is 15mm. 
and it is found in Alaska. Other species will be 
found mentioned in the List. 
Crenélla decussata, Montagu, the Netted Cren- 
ella, is a little affair about 3mm. long, which is cir- 
cumboreal in its range. The valves are rounded, 
and marked by numerous radiating ribs. The 
edge of the shell is crenulated behind the ligament 
area. While it is sometimes found in San Pedro 
Bay, its home is in the north, where several other 
allied species are found. 
The Pectens, or Seallop-shells, are among the 
most pleasing mollusks to be found in the ocean. 
Of regular shape, brightly colored, and _ finely 
sculptured, it is no wonder that these shells have 
been imitated in all sorts of carved work. And if 
one is fortunate enough to become acquainted with 
a live specimen, he will be abundantly rewarded 
by watching its interesting habits. We have a 
good many species on this coast, some of which 
are not too distinct. 
