PACIFIC SCIENCE, Vol. II, January, 1948 
FIG. 1. Spinther alaskensis new species: a, entire animal in dorsal view, X 6.4; b, portions of 
typical notopodial ridges from the dorsal region to show the alternation of setae in anterior and 
posterior margins, enlarged; c, neuropodium from a median segment, in anterior view, showing 
the acicular sac and developing setae torn from the body wall, enlarged. 
