toe Nereus. 
Vou. vu. APRIL, 1894. No. 12 
THE CALIFORNIAN SPECIES OF THE GENUS NUTTALLINA. 
BY W. J. RAYMOND, OAKLAND, CALIFORNIA. 
In the Manual of Conchology, Vol. 14, p. 280, after directing 
attention to the differences existing between Nuttallina californica 
Nutt. and N. seabra Rve., Mr. Pilsbry remarks. that data are desir- 
able concerning the areas of distribution of the two species along 
the Californian coast, especially between San Diego and Point Piedras 
Blancas, near San Simeon. Having collected numerous specimens 
of this genus at various points between Bolinas and Santa Barbara, 
I can offer the following notes. 
A glance at a map ofthe West Coast will recall certain geograph- 
ical features bearing upon the distribution of marine life. Going 
southward from San Francisco, the coast line which has followed a 
general southeasterly direction, bends abruptly to the east at Point 
Concepcion. Asa result of this, the great ocean current from the 
north which has held to a course near the coast and parallel with it, 
all the way from Alaska, leaves it for the first time and flowing 
southward, is still further deflexed by the chain of the Santa 
Barbara islands. From Point Concepcion eastward, the ocean is 
warmer and the other conditions surrounding marine life are such 
as to warrant the expectation of an assemblage of species, different 
from those found north of the cape. While many species of mollusks 
are common to our whole Californian coast, Terebra simplex, Drillia 
hemphilli, Marginella varia, Cypraea spadicea, Trivia solandri, Tur- 
ritella cooperi, Norrisia norrisii, Trophon belcheri, T. triangulatus, 
Periploma planiuscula and Barbatia gradata are species of a more 
southern fauna, found in Santa Barbara county, which do not as far 
