250 COLE 
Of the two species previously described from the Pacific coast 
the first was established by Stimpson (’64) from a single speci- 
men, which he called Ammothea longicaudata, collected in Puget 
Sound by the Northwest Boundary Commission. Stimpson’s 
description of the species is preliminary and indeterminate; the 
fuller description and figures were never published. In 1892 
Ives (’92) described a species of Pycnogonum from San Diego, 
California, which he named Pycnogonum stearnst, after the collec- 
tor. These constitute the references to the shore forms on the 
Pacific coast of North America. Schimkewitsch (’93) has de- 
scribed the deep-sea specimens collected by the AJ/datross in the 
Gulf of California and to the southward, none of which was 
taken in less than 660 fathoms of water, and in a previous paper 
(Schimkewitsch, ’89) he describes the collections of the Vettor 
Pisani, a part of which were made in the Gulf of Panama and at 
various places along the coast of South America. On the Atlantic 
coast of North America the chief systematic work has been done 
by Wilson (’'78, 78», ’80, and ’81). 
The collections here reported comprise altogether 108 speci- 
mens, of which 42 are adult males, 39 adult females, and 27 
immature specimens. These represent 13 species, included in 
9g genera. Specimens of all these species have been deposited 
in the Museum of the University of California, including the 
type specimens of those species which are here described for the 
first time. Duplicates, so far as possible, will be deposited in the 
United States National Museum. 
GEOGRAPHICAL DISTRIBUTION. 
The available data are so meager that no very general conclu- 
sions can be drawn respecting the distribution of Pycnogonida 
on the Pacific coast. It may be worth while, however, to con- 
sider the question briefly, and to compare the results with what 
is known of the distribution of other groups in that region. The 
accompanying table shows graphically the distribution of the 
Pycnogonida known from the west coast, including the species 
reported from Puget Sound, which may possibly be synonymous 
with one of the species of Ammothea reported from Alaska. 
