POLYCHAETOUS ANNELIDS FROM CHINA — TREADWELL 277 



shorter, and succeeding ones are not more than one-third to one-half 

 the length of the first setigerous somite. 



Gills appear on the first somite, and while only a few are retained 

 they apparently occur throughout the body, some of the posterior 

 ones being longer than the body diameter. The tentacles lie in a 

 transverse row on the dorsal surface of the fifth setigerous somite. 

 One of the these (unfortunately broken off during examination) was 

 0.4 mm in diameter at the base, and its length was several times the 

 diameter of the body. Owing to extensive coiling the precise length 

 was not possible to get. Probably originally there were on either 

 side one large tentacle and several smaller ones, the whole forming a 

 continuous band across the dorsal surface of the somite. 



Setae of anterior somites are very slender and extend much farther 

 from the body surface than do those of later somites. They curve 

 gently to an acute point, and in some very minute roughnesses may 

 be seen along one margin. Occasionally these seem regular enough 

 to be listed as denticulations, but usually they are very irregular 

 and may in most cases be merely minute grains of foreign matter 

 attached to the seta. On either side of the posterior somites are two 

 setal tufts composed of about six moderately heavy spines, which 

 narrow slightly and then curve toward the blunt end, and a few slender 

 setae similar to those in anterior somites but much less prominent. 



Type.— IJ. S.N M. no. 20119 (Chen no. 15). 



Family MALDANIDAE 



Genus EUCLYMENE Verrill 



EUCLYMENE ANNANDALEI Southern 



Euclymene annandalei Southern, 1921, p. 648, pi. 28, fig. 22, a-g; pi. 29, 



fig. 22, h-k. 

 Clymene (Eyclymene) annandalei Fauvel, 1932b, p. 199; 1933, p. 51. 



In only three points does this specimen (Chen no. 9) difl'er from 

 Southern's description. The first is that there are two instead of a 

 single uncinus in the neuropodium of anterior somites. According 

 to Chamberlin (1919, p. 409) Euclyme7u has only one of such setae, 

 the alternative being Paraxiothea Webster, in which they are "num- 

 erous." Since two can hardly be considered as numerous, I have 

 listed them as Euclymene. Fauvel calls it the genus Clymene, a 

 name that is preoccupied (Chamberlin, 1919, p. 410). 



A second difference is that the dorsal setae in the posterior somites 

 remain in a tuft and do not arch over and around the ventral. A 

 third is that while Southern found 14 to 24 cirri on the margin of the 

 anal funnel, this has 30. Since none of these characters seems to be 

 of specific importance, I have listed the specimen as above. 



