Vol. V] DICKERSON— FAUNA OF THE TYPE TEJOM 65 



available and the study of these forms demonstrates their 

 identity with Bursa washingtoniana. One specimen from 

 Locality 245 appears to have a slightly higher spire than the 

 Washington forms but this specimen is a larger one than any 

 of the forms from the north and comparative material shows 

 that this is a variation due to growth. Younger individuals 

 are the same in form and decoration as B. washingtoniana. 



B. washingtoniana at the type locality of the species varies 

 as respects the strength of nodes and position of varices. The 

 closely allied forms Nyctilochns calif ornicus, N. hornii and A''. 

 zvashingtoniana are introduced for comparison (See Plate 7, 

 figures?, 8, 9). 



Cantharus perrini, new species 

 Plate 7, figures 10a, 10b 



Shell small, short, stout wnth large inflated body-whorl 

 marked by strong spiral lines which alternate in size; whorls 

 six; first two smooth; third, fourth and. fifth whorls flat-sided 

 and decorated by three strong spiral lines with two of lesser 

 strength between ; body-whorl decorated by eight or nine strong 

 spiral lines with alternating threads ; aperture oval ; outer lip 

 dentate and lirate within; siphonal fasciole well developed; 

 umbilicus subimperforate. 



Dimensions : — Length, 12 mm. ; width of body-whorl, 7 mm. 



Type: — No. 315 Cal. Acad. Sci. Locality 183. in the west 

 bank of the Cowlitz River about one and three-fourths miles 

 southeast of Vader (Little Falls), Washington. Coll., Bruce 

 Martin. 



Named in honor of Professor J. Perrin Smith of Stanford 

 University. 



Chrysodomus ruckmani, new species 



Plate 7, figure 11 



Shell solid, spindle-shaped, with six or seven whorls ; spire 

 moderately elevated, consisting of five or six very slightly 

 rounded whorls ; whorls decorated by six to eight spiral lines 

 wath small threads in the interspaces ; five incremental lines 

 crossing the spiral lines; suture linear, distinct; body-whorl 

 rounded and nearly twice as long as the spire ; aperture large, 

 widest in middle, and terminating in a twisted canal; outer lip 

 simple; inner lip slightly incrusted. 



June 15, 1915. 



