AET. 15 POLYCHAETOUS ANNELIDS FROM ORIENT — TREADWELL 6 



24, pi. 1, fig. 7; pi. 4, fig. 1; pi. la, fig. 16; pi. 2a, figs. 8 to 12), in 

 assigning it to rostrata. 



One specimen collected at Pango Pango, Samoa. 



Genus NOTOPYGOS Grube 



NOTOPYGOS ANDREWSI Monro 



Notopijgos andreicsi Monro, 1924, pp. 73-75, figs. 5 and 6. 



I had described and figured what seemed to be a new species of 

 this genus when Monro's description of N. andrewsi appeared, and it 

 is evidently the same species. Since the description I had prepared 

 adds some data to that of Monro's I have decided to let it stand as 

 originally written. 



Two varieties of this species appeared in my collection. The first 

 is colorless except for a narrow band of bluish gray pigment across 

 the anterior face of the base of the notopodium in the anterior body 

 somites, disappearing toward the posterior end of the body. In the 

 two specimens representing this variety the anal opening is on the 

 anterior margin of setigerous somite 23. Two specimens also repre- 

 sent the other variety, and in them the anal opening is on the anterior 

 margin of setigerous somite 24. They are marked on the entire 

 dorsal surface with blotches of bluish gray. In a general way, these 

 blotches may be described as consisting in each somite of a band 

 running across both the anterior and posterior dorsal margins, ex- 

 tending out on to the bases of the parapodia ; and as four patches on 

 the dorsal surface, two on either side of the mid-line, the posterior 

 much the larger of the two, and much more irregular in outline. 

 The center of each larger patch is lighter colored than the margin, 

 and in the smaller individual these patches are in the form of rings. 

 Both sets of patches connect irregularly with the lateral bands. 

 Since the specimens agree in all other respects I consider these as 

 at most varietal differences and in view of the limited number of 

 specimens (4) consider it best to describe them as one species, with- 

 out giving them varietal names. 



According to my record, one specimen of each variety was taken 

 at Pango Pango, and the same number at Suva, Fiji. It is possible 

 that there was a confusion of labels in transferring these, and that 

 both of the second variety came from Suva, in which case these 

 could be regarded as geographical varieties, but to the best of my 

 knowledge each locality yielded one of each kind. The type was 

 collected at Pango Pango. 



In one specimen, the body is 45 mm. long, widest about midway, 

 where it measures 8 mm. From here it tapers gradually to a width 



