166 ANNELIDA POLYCHAETA. 



4 teeth on each side; basal region, V. a single conical point; 



VI. one long, ridge-shaped tooth, situated more in front; 



VII. and VIII. a belt of two irregular rows. — Coast 

 of Portugal. 



Of this species I examined five examples , three atocous 

 and two epitocous females; they were collected by Prof. M. 

 P. d'Oliveira near Buarcos , la Granja and Sines. The epito- 

 cous forms differ from the other ones by their large dimen- 

 sions; unfortunately these specimens are incomplete, one of 

 them wanting the posterior body-region , whereas in the 

 other worm this region is partly regenerated. At the 20th 

 segment the change of the feet occurs. The superior ligule 

 is greatly elongated, conical and bears near the base of the 

 dorsal cirrus an oblong oval lamella , at its ventral side a 

 small rounded one; the dorsal cirrus projects somewhat 

 beyond the tip of the ligule. The lip of the dorsal setige- 

 rous lobe , enlarged and elongated in the same manner as 

 the ligule, is provided at the base of its ventral side with 

 a small oval lamella. The ventral lobe is cylindrically pro- 

 duced and furnished with a large lamella, which is a little 

 emarginated on the ventral side. The inferior ligule is about 

 of the same length as the ventral lobe, faintly curved and 

 provided with a conical process behind the middle of the supe- 

 rior border. The ventral cirrus reaches nearly to the tip of 

 the inferior ligule, bearing near its base on the dorsal side 

 two small tongue-shaped lamellae and on the ventral side 

 a large oblong oval one. Bristles with knife-shaped terminal 

 pieces occur in both lobes of the feet. 



In some specimens the transverse paragnathi of group 

 VI. show curious variations. For, whereas each paragnathe 

 consists in its normal state of a long, narrow ridge, slightly 

 notched in its middle, I found in one atocous specimen the 

 left ridge broken up in four , the right one in three short 

 transverse teeth ; in the middle between both rows a small 

 conical tooth was situated , and behind the right row a 

 large A-shaped tooth. The unpaired paragnathe of group V. 

 has its normal situation. In examining the proboscis of the 



Notes from the Leyden Museum, Vol. XI. 



