NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 129 



the following setal structures: 2 (or one) black acicula, one (or 2) 

 brown subacicular hook, 10 composite falcigerous hooks (pi. 8, fig. 185), 

 9 or 10 limbate setae, more than 10 smaller pectinate setae (pi. 8, fig. 

 188) and 4 or 5 large, pectinate setae (pi. 8, figs. 184, 187), with teeth 

 more numerous than in the closely related M. sanguinea (above). 



Distribution. — M. aenea is now known from Chile and Peru, north 

 to western Mexico and the southern end of the Gulf of California. It 

 is typically intertidal. 



Marphysa conferta Moore 



Moore, 1911, pp. 252-254, pi. 16, figs. 29-34. 



Collection.— 1142-40 (1) ; 1210-40 (1) ; Laguna Beach, California, 

 from kelp holdfast, washed in ( 1 ) . 



This unique species is distinguishable from others of the genus as 

 indicated in the key above. 



Distribution. — M. conferta is known only from southern California, 

 below the intertidal zone, sometimes washed in on kelp holdfasts. 



Marphysa stylobranchiata Moore 



Moore, 1909, pp. 249-251, pi. 7, figs. 8-12. 



Collections. — Numerous specimens from intertidal zones, central and 

 northern California. 



Distribution. — Common in intertidal zones of northern and central 

 California, It has recently been reported from Mazatlan, Mexico 

 (Rioja, 1941,p. 712). 



Marphysa mortenseni Monro 



Monro, 1928, pp. 86-88, figs. 9-12. 



Collection.— 1332-41 (1). 



Distribution. — Previously known only from Taboga, Panama, sandy 

 shore at low tide, this extends its range to northernmost Lower Cali- 

 fornia, in 48-51 fms. 



Genus PARAMARPHYSA Ehlers 

 Type P. lon^ula Ehlers 



Paramarphysa dififers from Marphysa (above) chiefly in lacking 

 branchiae. 



