BANSE: REDESCRIPTIONS OF SOME SPECIES OF CHONE AND EUCHONE 



which was preserved in Formalin and stored in 

 alcohol. The second specimen was orange-red 

 in life as was the holotype while freshly pre- 

 served (Johnson, 1901). Upon staining with 

 methyl green the entire body surface turns uni- 

 formly green except for the collar and the inter- 

 and intrasegmental furrows. 



Remarks: Because of the presence of spatu- 

 late setae in the type species, Megachone is a 

 synonym of Chone (cf. p. 461). 



Megachone aurantiaca may be distinguished 

 from the similar species, C. infiindihuUformis, 

 by the insertion of the first thoracic bundle of 

 setae and the form of the abdominal uncini. 

 Chone magna, when deprived of the branchial 

 crown, will also be difficult to distinguish from 



C. aurantiaca but can be recognized by the same 

 diagnostic characters. Chone mollis, the third 

 fairly large species of Chone on the North Amer- 

 ican west coast, has a different arrangement of 

 intersegmental furrows anteriorly (Figure 3c), 

 large notopodial lips and somewhat different ab- 

 dominal uncini, especially posteriorly (Figure 

 3h). 



CHONE MOLLIS (BUSH) 



Figure 3 



METACHONE MOLLIS Bush, 1904, p. 216. 

 CHONE MOLLIS.- Hartman, 1942b, p. 87; 

 1944b, p. 279; 1969, p. 673. 



Figure 3. — Chone mollis ; AHF 003258, setae not drawn to s^cale : a, end of median radi- 

 cle, pinnules schematically drawn for one side ; b, ventral view of anterior end. Some- 

 what schematic, branchial crown omitted; c, anterior end from the right side, branchial 

 crown omitted ; d, anterior view of thoracic notopodium. In dotted outline the extended 

 cirrus ; e, bayonet-type seta ; f , spatulate seta ; g, uncinus from second abdominal setiger. 

 Detail: top viewed en face; h, uncinus from 30th abdominal setiger (of about 40 total 

 abdominal segments). 



469 



