368 GEOLOGICAL SURVEY OF THE TERRITORIES. 
THE CALIFORNIAN OR PACIFIC PROVINCE. 
But one species, Hstheria californica, (unless H. newcombiu be regarded 
as distinct) inhabits this area, which is separated by the Cascade Mount- 
ains and the Sierra Nevada from the Central province, and extends from 
52° north southward to San Diego. 
No species is as yet known from Central America; and the two 
Mexican forms occur in elevated regions in Northern Mexico, and are 
not peculiar to Mexico, being characteristic of the Central province of 
the United States. : 
THE ANTILLEAN PROVINCE. 
The species inhabiting the West Indies are comprised in the following 
brief list : 
Hstheria jonesiv. Apus guldingit. 
Hulimnadia antillarum. Artemia guildingit. 
Apus domingensis. Streptocephalus similis. 
SPECIES COMMON TO THE ATLANTIC AND CENTRAL PROVINCES. 
Estheria mexicana ranges from Ohio to Lake Winnepeg, northward, 
and westward to Western Colorado, and into Northern Mexico. 
Artemia gracilis ranges from Salem, Mass.,to Mono Lake, in California, 
but the life-conditions of this brine-inhabiting genus are so exceptional 
that we have not mentioned it in the foregoing lists. Our only truly Al- 
pine form is Branchinecta coloradensis, found at an elevation of 12,000 
feet in Colorado. 
SPECIES INHABITING SOUTH AMERICA (Brazilian Region). 
Estheria brasiliensis Baird. Brazil. 
Estheria dallasii Baird? Brazil. 
SPECIES INHABITING THE EUROPZO-ASIATIC REGION. 
a.— The European Province. 
1. Western Europe. 
Limnetis brachyurus. Germany. 
Estheria cycladoides. Toulouse. 
Limnadia hermanni. France and Germany. 
gigas. Central and Northern Europe. 
tetracera. Germany. 
Branchipus stagnalis.* England and Central Europe. 
grubet. Central Europe. 
Artemia salina. England and Europe. 
Chirocephalus diaphanus. England, France, Switzerland. 
Lepidurus productus. England and Central-Europe. 
Apus cancriformis. Central Hurope. . 
grubet. Germany. 
lubbockit. Germany. 
_ * Branchipus lacune Guérin, Baird, Grube; and B. braueri Frauenfeld, are regarded 
by Lilljeborg (Nov. Acta Upsala (3), ix, A, p. 3) as synonyms of B. stagnalis. 
: 
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