The nudibranch family Dironidae. 533 
dition may of course have been caused by distortion produced in 
the preservation of the animal. In the largest individual dissected 
the glans was 3,5 mm long and 0,7 mm in diameter while in a 
second individual it was 2,4 mm long and 0,32 mm in diameter. In 
Dirona picta the greatest leneth found was 0,96 mm, the diameter 
being 0,05 mm. 
The remaining portions of the anterior genital complex consists 
of the mucus and albumen glands (Fig. 20, n, a), which present 
much the same features in both species. They are compact bodies, 
the albumen gland resting in a depression upon the surface of the 
mucus gland. The excurrent duct is large and forms the lower 
portion of the genital atrium before described. 
