BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND. 5. N:O 16. 25 
end. The penis is somewhat larger than that of any other 
species in the genus, and the body of the worm is tougher. 
C. californicus has the exterior end of the penis-sheath 
suddenly expanded or increased in size, but its end is not 
plate-like, only trumpet-shaped. The whole organ is also com- 
paratively shorter and thicker than in OC. igneus. "The ovi- 
duct is single. 
