NO. 3 HARTMAN : POLYCHAETOUS ANNELIDS 203 



The largest specimen (Galapagos Islands) is about 350 mm long; its 

 width without, 17 mm, with setae, 20 mm. An individual from 626-37 

 has dark dorsal and ventral cirri, otherwise it is pale, as usual. Another, 

 from 446-35, has an accessory lateral caruncle. A small individual from 

 708-38, only 23 mm long, has a regenerated prostomium and first setig- 

 erous segment. 



Augener (1922, p. 172) studied collections of E. paupera (Grube) 

 from Chile and Juan Fernandez and E. complanata (Pallas) from the 

 tropical Pacific, and concluded that the two were identical, except for 

 size, and that E. complanata is typically much larger than E. paupera, 

 but that they intergrade. 



The collections available for study range from the Gulf of California 

 south to Peru and west to the Galapagos Islands. Only one species, E. 

 complanata, is apparently present. The largest individuals (to 350 mm 

 long) came from Hood Island, the smallest from the Gulf of California. 

 In the details of their structure, however, they do not differ (see also dis- 

 cussion under Pareurytho'e calif arnica). 



Distribution. — Circummundane, in tropical seas. Common in inter- 

 tidal zones to 10 fms. Less common in depths to 60 fms (Gulf of Cali- 

 fornia). Found only rarely off southern California, in the intertidal zone, 

 and perhaps may be considered as not occurring, typically, north of the 

 Gulf of California, except from dredged materials. 



Genus PAREURYTHOE Gustafson 



Pareurytho'e Gustafson (1930, p. 393) was erected to include those 

 species that resemble Eurythoe Kinberg, in which the caruncle is simple, 

 in contradistinction to those in which the caruncle consists of dorsal and 

 ventral lobes. To this genus were assigned 4 species : Eurythoe calif ornica 

 Johnson, E. chilensis Kinberg, both from the eastern Pacific, Pareurytho'e 

 japonica Gustafson from Japan, and P. gracilis Gustafson from the Mar- 

 shall and Gilbert islands. Eurytho'e spirocirrata Essenberg (1917, p. 66) 

 may belong here. 



Pareurythoe calif ornica (Johnson) 



Plate 31, Figs. 5-9 



Eurytho'e californica Johnson, 1897, pp. 159-161, pi. 5, figs. 8-14; 



Moore, 1909, p. 242; Treadwell, 1914, p. 179. 

 Pareurytho'e californica Gustafson, 1930, pp. 307, 308, 391. 

 Eurytho'e paupera Chamberlin, 1918, p. 173. 

 ?Eurytho'e californica Ehlers, 1901, p. 34. 



