204 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 7 



Collections.— 902-3^, 904-38, 906-38, 907-38. 10 specimens. 



Pareurythoe californica, originally described from southern Califor- 

 nia (Johnson, 1897, p. 159), was later made the subject of comparison 

 with Eurythoe pauper a (Grube) from western South America by Ehlers 

 (1901, p. 34) and the two were concluded to be the same. Chamberlin 

 (1918, p. 173) identified some specimens from Monterey Bay, Califor- 

 nia, as E. paiipera and corroborated Ehlers' synonymy. These records in- 

 timate a discontinuous distribution of a single species, E. complanata, over 

 widely separated areas, central California and western Chile, which our 

 field collections have not substantiated. E. complanata occurs very rarely 

 in collections from southern California. P. californica, however, which is 

 typically much smaller than E. complanata, is common in southern Cali- 

 fornia, but only rarely taken in central California. 



For purposes of comparison of these two species, smaller representa- 

 tives of E. complanata from the Gulf of California and typical P. califor- 

 nica from southern California have been used. The most striking differ- 

 ences are: (1) In £. complanata the prostomium and caruncle are com- 

 pressed between the first 4 setigerous segments, the anterior margin of the 

 ocular lobe is posterior to the first segment (pi. 31, fig. 1 ) ; in P. califor- 

 nica the ocular lobe is not compressed between the first segments, the 

 caruncle extends posteriorly through less than 2 segments, and the an- 

 terior margin of the ocular lobe is anterior to the first segments (pi. 31, 

 fig. 5). (2) The general appearance of E. complanata is spinous, of P. 

 californica notably smoother. (3) \n E. complanata the anterior margin 

 of the prostomium is medially incised or concave (pi. 31, fig. 1) ; in P. 

 californica it is convex (pi. 31, fig. 5). (4) The hastate acicular setae are 

 distally triangular in E. complanata, subquadrate in P. californica (pi. 

 31, fig. 7). (5) All neuropodial setae of posterior parapodia are orna- 

 mented with one or a few denticulations in P. californica (pi. 31, fig. 8) ; 

 in E. complanata most are smooth (pi. 31, fig. 2) , some of the longer setae 

 have a few oblique teeth (pi. 31, fig. 3). The serrated notopodial setae are 

 coarser, relatively, in P. californica (pi. 31, fig. 9). 



Pareurythoe californica and P. chilensis Kinberg (1910, pi. 12, fig. 

 9) are different in that P. chilensis has a caruncle that extends posteriorly 

 to the third setigerous segment. According to Kinberg, the setae also are 

 different. 



Distribution. — Southern California. Common in the intertidal zones. 

 On the under sides of rocks, in crevices; sometimes in the burrows of 

 other chaetopods. 



