No. 1704. A COLLECTION OF SHELLS FROM PERU—DALL. 185 
Tryon, GrorcGEeE WasHINGToN (and Pirspry, Henry Avueustus). Manual of 
Conchology, structural and systematic. 17 vols., 8°, 1879-1898. (Man. Con.) 
After the death of Mr. Tryon, in 1888, this work was continued by Doctor Pilsbry. 
The above title refers to the series containing the Marine Gastropods only. In par- 
ticular monographs the authors were assisted by W. B. Marshall, Benjamin Sharp, 
and 8. Raymond Roberts. 
Wisset, Kurt von. Beitriige zur Anatomie der Gattung Oncidiella. Zool. Jahr- 
- buch, suppl. Bd. 4, pt. 1, 1898, pp. 583-640. 
Zoorocican Society or Lonpon. Proceedings, 1832-1854. 8°. 
Includes descriptions of species collected on the west coast of South America by 
Hugh Cuming, and diagnosed by Broderip, Sowerby, Powys, Swainson, and others. 
These descriptions as a rule have no titles assigned to them. (Proc. Zool. Soc.) 
THE PERUVIAN PROVINCE. 
The littoral marine molluscan faunas of the west coast of the two 
Americas, excluding the Arctic and Antarctic faunas properly so 
called, were recognized more than half a century ago in their main 
outlines by Woodward. 4 
They comprise, beginning at the north: 
1. The Oregonian Province, extending from the limit of floating ice 
in Bering Sea south to Poimt Conception, California ; 
. The Califorman Province, ranging from Point Conception south 
to Lower California; 
3. The Panamic Province, from Lower California, including the Gulf 
of California, south to the Bay of Guayaquil, Ecuador; 
4. The Peruvian Province, extending from Guayaquil south to the 
vicinity of the island of Chiloé in southern Chile; and 
. The Magellame Province, from Chiloé to the Fuegian Archipelago, 
and for a short but undetermined distance north on the Argen- 
tine coast, on the Atlantic side. 
These provinces will eventually be recognized as containing minor 
divisions, with which, on this occasion, we are not concerned. 
The distribution recognized in the term ‘“‘Province”’ appears to 
be directly dependent on the temperature of the surface stratum of 
the sea which, in its turn, is distributed by ocean currents. In the 
case of the Peruvian Province a branch of the eastward-flowing 
south Pacific current diverges from the main stream and impinges 
upon the coast of South America in the vicinity of Chiloé Island. 
Thence it follows the coast northward, until by the northwesterly 
trend of the Peruvian shores it is diverted, in the vicinity of Point 
Aguja and Cape Blanco, to the westward, where it continues in the 
direction of the Galapagos group of islands. This current, known as 
the ‘‘Peruvian”’ or ‘‘ Humboldt” current, throughout its entire extent 
maintains a temperature varying with the season of from 65° to 70° 
F. The temperature of the surface off Aguja Point, Peru, in Novem- 
ber was 65° F. The temperature of the water in the Magellanic 
i) 
Or 
@ Manual of the Mollusca, 1856, pp. 373-377. 
