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 stcarnsi^ 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 Albatross 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 

 9 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. 



