ANNELIDA POLYCHAETA. 175 



half that of the following segment. Tentacular cirri short; 

 the longest of the inferior pair about of the same length 

 as the palpi , the longest of the superior pair projecting 

 beyond the antennae , reversed they reach to the 5th seg- 

 ment. The feet of the anterior and posterior body-re- 

 gion show a different appearance. In the anterior feet, 

 the lip of the dorsal setigerous lobe blunt, rounded; the 

 lips of the ventral lobe only a little shorter , trapezoidal , 

 with a slight notch. Superior ligule of the same shape and 

 length as the dorsal lobe ; inferior ligule a little shorter , 

 obtusely conical. The dorsal cirrus arises from a shallow 

 notch of the superior ligule and is very long, projecting 

 far beyond the tip of the dorsal lobe; the ventral cirrus 

 only a little longer than the inferior ligule. In the poste- 

 rior segments the superior ligule is considerably enlarged 

 and consists of a broad lamella with a straight external 

 margin and a convex internal one ; it bears on its tip the 

 dorsal cirrus, which has only half its length. The dorsal 

 lobe does not reach further than one fourth of the length of 

 the ligule; the inferior ligule has undergone no change and 

 has about the same length as the ventral cirrus. In the 

 dorsal lobe only homogomph setose bristles; the ventral 

 lobe contains : in the superior fascicle heterogomph falcate 

 bristles and homogomph setose ones, in the inferior fascicle, 

 besides the heterogomph falcate bristles, a couple of hete- 

 rogomph setose bristles, at least in the posterior segments. 



Paragnathi of the proboscis: Maxillary region, I. one or 

 two teeth ; II. small group of 3 or 4 curved rows ; IV. 

 large group of 4 to 5 transverse series, and a semilunar 

 patch in front of them; III. group of 3 or 4 transverse 

 rows ; basal region , V. one conical tooth ; VI. transverse 

 ridge; VII. and VIII. a belt of two series of teeth. 



The bottle contained only one complete specimen, be- 

 sides some fragmentary examples, among which two ante- 

 rior body-regions with proboscis. The worms are decolored, 

 only the dorsum is partly brownish and marked with white 

 transverse bands on the anterior margin of each ring. The 



Notes from the Leyden Museum , Vol. XI. 



