DECAPODS 7. 
species which follow the coast-line. The occurrence of some 
abyssal forms, as Hymenodora glacialis and H. frontalis, in the 
deep pocket (1569 fathoms) east of Prince of Wales Island is 
worthy of note. 
The following is a list of the genera occurring below the 500- 
fathom line. Those whose range extends below 1000 fathoms 
are printed in italics: 
Pasiphea Pagurus (2 species) 
Parapasiphz Parapagurus 
Acanthephyra Pristopus 
fymenodora Leptolithodes 
Pandalopsis (1 species) Lithodes 
Spirontocaris (5 species) Munida 
Crangon (3 species) Munidopsis 
Sergestes Chorilia 
Benthesicymus Chionecetes 
Gennadas Hyas 
Calastacus 
Dr. Dall’ divides his Oregonian fauna, which stretches from the 
end of the Aleutian chain to Point Conception, California, into 
three subfaunal areas, with divisions at Yakutat Bay or Mount St. 
Elias, Alaska, and at Cape Mendocino, California. 
Professor Nutting,” on the other hand, reasoning from his study 
of the Hydroids, emphasizes the effectiveness of Puget Sound as 
a faunal barrier and the continuity of the area between that point 
and the end of the Aleutian chain.’ 
It is highly probable that future research will make it possible 
to subdivide the coast into several small areas. The accompany- 
ing table shows the intricate overlapping of species. 
1The Fur Seals and Fur-Seal Islands of the North Pacific Ocean, Pt. III, 539-546, 
1899. 
2Proc. Wash. Acad. Sci., 111, 161, IgOT. 
3 Professor Nutting had not consulted Dr. Dall’s report above cited, in which state- 
ments made twenty-three years earlier are considerably modified. 
