SIGALIONIDAE 



107 



of almost invisible eyes lying one beneath the other. A large part of the head is covered 

 by a dorsal fold from the following segment. The first pair of feet carry the lateral 

 tentacles, which are about equal in length to the head, a dorsal cirrus a little longer than 

 the lateral tentacles, a ventral cirrus of about twice this length, and a bundle of long, 

 slender bristles. The palps are about three times as long as the ventral cirrus of the ist 



•smm 



1 



•5MM 



IMM 



Fig. 14. Psammolyce semiglabra. 



a. Head from above. e. Unidentate ventral bristle. 



b. El)rtron from middle of body. /. Shorter bidentate ventral bristle. 



c. Middle foot from in front. g. Longer bidentate ventral bristle. 



d. Middle foot from behind. 



chaetiger. The 2nd chaetiger bears the first pair of elytra, a short branchia and a long 

 ventral cirrus. The 3rd chaetiger carries a pair of dorsal cirri long enough to reach to the 

 tips of the bristles. In these cirri the style is only about half as long as the ceratophore, 

 at the base of which there is a short branchia. 



