270 



PROCEEDINGS OF THE ACADEMY OF 



[June, 



THE DISTRIBUTION OF THE NORTH AMERICAN GORDIACEA, WITH 

 DESCRIPTION OF A NEW SPECIES. 



BY THOMAS H. MONTGOMERY, JR. 



Through the kindness of Dr. Charles W. Stiles a collection of Gordia- 

 cea from the Smithsonian Institution was sent me for examination, 

 which included the following new species : 

 1. Gordius alasoensis n. sp. 



c^, Smithsonian Institution Coll. No. 6,962; Snug Harbor, Cook 

 Inlet, Alaska. 



Length, 120 mm. 



Form. Cylindrical, very slender, without median grooves; apex of 

 head rounded, anterior portion of the body scarcely narrower than the 

 middle portion. Tail lobes slightly longer than broad (fig. 3 on ventral 

 and fig. 2 on lateral view), somewhat flattened medially, without hairs 

 or spicules ; the cloacal aperture is placed upon a slight eminence, and at 

 a distance from the latter, anterior and lateral to it, is an arched integu- 

 mentary ridge. 



CuticuJa (fig. 1) with low areolae elongated parallel to the long axis 

 of the body, irregular in form and size, close together and irregularly 

 confluent; contiguous areolae are interconnected by one or several 

 narrow ridges. 



Color iridescent dark brown with a darker neck ring, rounded tip of 

 head white. 



