ART. 26 TWO NEW POLYCHAETOUS ANNELIDS — TREADWELL 3 



stouter and extend to about midway of the dorsal cirrus. The shaft 

 is of uniform width to near the end, where it narrows to a blunt point. 

 There is a subapical tooth, and there are rows of toothed plates 

 proximal to the latter. 



LEODICE ARGENTINENSIS, new species 



In the collection are three specimens of Leodice, none of which is 

 entire; but it seems best to record as much as possible, subject to 



Figures 1-6.— Halostdna grisea. 1, anterior end X 10: 2, elytron X 9.5; 3, 

 PARAPODiUM X 7.5; 4, DORSAL SETA X 85; 5, DORSAL SETA X 85; 6, ven-tral seta 

 X 85. Figures 7-12.— Leodice argentixensis. 7, anterior end X 10; 8' 

 PARAPODIUM X 27.5; 9, compound SETA X 250; 10, pectinate seta X 250; 11, 



MAXILLA X 10.5; 12, MANDIBLE X 105. 



correction if more material is available in the future. The largest 

 of the three retains approximately 75 somites beside the head, these 

 measuring 70 mm. in length. The peristomial width is 4 mm. and 

 in the region of somite 10 the body width is 6 mm. Except that 

 the tentacle tips are badly decomposed it is well preserved. One of the 



