PYCNOGO^TIDS FROM PUGET SOUND — EXLINE 421 



the Pribilof Islands ^ ; it agrees with latifrons in the sexual char- 

 acters and in possessing the long, well-developed cheliferi, but differs 

 notably in the shorter abdomen and the small size. It differs from 

 the description of A. longicaudata Stimpson (1864, p. 159) from 

 Puget Sound in having only eight segments in the palpi instead of 

 nine and in its small size. Stimpson's description gives very few 

 specific characters and is compiled from a single immature specimen, 

 which should probably be placed in the genus AmmofkeUa because 

 of the 9-segmented palpi; Amniothella longicaudata (Stimpson) has 

 not been collected in recent years. 



A. discoidea is found in large numbers among hydroids of certain 

 localities. Its limited distribution seems quite unaccountable at the 

 present time. It has been collected only within a small range in the 

 central part of Puget Sound off McNeils Island. 



AMMOTHEA ALASKENSIS Cole 



Ammothea alaskensis Cole, Harriman Alaska Expedition, vol. 10, p. 266, pi. 12, 

 fig. 4 ; pi. 17, figs. 4-12, 1904. 



One female specimen found off Lake Hancock, Puget Sound, July 

 8, 1935, dredged from 60 meters along with many specimens of A. 

 discoidea. It measures only 2 mm rather than nearly 3 mm, the 

 eye tubercle is a little larger than that figured by Cole, and the 

 abdomen is not so heavily spined. In other respects the specimen 

 agrees so closely with Cole's description that these differences are 

 to be overlooked until more material is available to study the varia- 

 tion consistent with the species. 



Genus PHOXICHILIDIUM Edwards 



PHOXICHILIDIUM FEMORATUM (Rathke) 



Nymphon femoratum Rathke, Naturh. Selsk. Skrifter, vol. 5, p. 201, 1799. 

 PhoxicMUdium femoratum Cole, Harriman Alaska Expedition, vol. 10, p. 283, 

 pi. 13, fig. 10 ; pi. 24, figs. 1-5, 19€4. 



Two females dredged south of McNeils Island, July 24, 1934; 

 females and 3 immature specimens dredged between Shaw Island 

 and Turn Rock, July 1, 1935; 1 female dredged from 60 meters off 

 Lake Hancock, July 10, 1935; 1 male with eggs dredged in Hoods 

 Canal, April 27, 1934; 1 male dredged from 70 meters off Caldron 

 Eock. July 10, 1935. 



These specimens differ considerably in size, 3.8 to 2.5 mm. Two 

 of the males possess ovigers in which there is an indication of a 

 sixth segment; the wall of this is not entirely complete and seems 

 to be inarticulate. 



' Scbmitt (1934, p. 69), however, records this species from Monterey Bay, Calif. 



