224 



Annelida Chcetopoda 



lateral, arise just within anterior eyes, niinute, mere 

 papillae, fusiform. Tentacular cirri, similar in all respects 

 to lateral antennae. 



Dorsal and ventral cirri a little larger than the lateral 

 antennae; otherwise, the same. 



Anal cirri two, slightly constricted at base ; for the rest, 

 subulate, in length about equal to last three segments, or to 

 middle antenna. On one specimen there were three anal 

 cirri, all of the same length. 



Feet fleshy, swollen, in length about one-third the width 

 of the body, a little longer than the dorsal cirri, bilabiate. 



Setae : on the anterior segments three or four with very 

 short curved appendix (f 51); one with capillary appendix 

 (f. 62); one simple seta, slightly curved near the end (f. 64). 

 On the posterior segments two or three of the first kind, 

 one of the third, and one similar to the third, but more 

 curved (f. 55). 



Body of nearly uniform width in the anterior half ; pos- 

 terior half, tapering gradually, the last segment being about 

 one-third the width of the middle segment. ]l!Tiimber of 

 segments, from 20 to 40. Length, 2 to 4™"" ; diameter, 0.25 

 to 0.5"°^. 



Color : either colorless, or white with a slight reddish 

 tinge. Usually there is a white line between the segments. 



(Esophagus, extends to the middle of the 5th segment. 



Stomach white, extending to the middle of the 8th seg- 

 ment. 



Common on shells, stones, etc. Dredged, 4 to 10 

 fathoms. 



AUTOLYTUS {Oruhe) Ma/renzeller. 

 Ehlers [Borstenwiirmer) gives as a leading characteristic 

 of AuTOLYTUS and PROCERiEA the failure of palpi. Clapa- 

 rede {Glanures) says of Autolytus, " Palpi (lobes frontaux) 



