42 HARTMAN 



eight known species. The MAGELONIDAE, with a single genus 

 Magelona F. Miiller, has at least six of eleven known species limited 

 to the northeastern Pacific. The family LONGOSOMIDAE is known 

 for a single genus and species from southern California. In the CHAE- 

 TOPTERIDAE, Mesochaetopterus Potts is entirely Pacific, with four 

 of the six known species coming from the eastern Pacific. 



In the OPHELIIDAE, Thoracophelia Ehlers is known for two 

 species of which one is from California, the other from southern South 

 America ; Euzonus Grube, as emended by Annenkova,^ includes three 

 species, of which one is Russian Arctic, two are Californian. In the 

 CAPITELLIDAE, Anotomastus Hartman, Capitita Hartman, Leio- 

 capitella Hartman and Mediomastus Hartman are represented by single 

 species from the northeastern Pacific. In the SABELLARIIDAE, Phrag- 

 matopoma Morch is known for only six species, of which five are eastern 

 Pacific, one West Indian; Idanthyrsus Kinberg is represented by three 

 of five known species. 



In the AMPHARETIDAE, Moyanus Chamberlin, Paiwa Cham- 

 berlin and Sosa?iopsts Hessle are represented each by a single species from 

 the eastern Pacific; Schistocomus Chamberlin is represented by three 

 species,^ of which two are from the northern Pacific, the third from 

 India. In the TEREBELLIDAE, Neoleprea Hessle is known for four 

 species, all Pacific; Ramex Hartman is known for a single species from 

 California; Scionides Chamberlin is known for two species, one from 

 California, the other from the West Indies ; Scionella Moore and Spino- 

 sphaera Hessle are known each for only two species, both from the north- 

 ern Pacific. 



In the SABELLIDAE, Eudistylia Bush is known for only three 

 species, Schizobranchia Bush for two, Megachone Johnson for one, all 

 from the northern Pacific ; Pseudopotarnilla Bush is represented by four 

 of the six known species. In the POEOBIIDAE, the single pelagic genus 

 and species, Poeobius meseres Heath, is not known outside the northern 

 Pacific Ocean. 



^Pectinophelia Hartman, 1938, characterized by having pectinately or dendriti- 

 cally divided branchiae and known for tv^o species, P. dillonensis and P. wil- 

 liamsi, both by Hartman, from California, is believed to be congeneric with 

 Euzonus Grube, as emended by Annenkova, 1935, p. 236. 



^Schistocomus hiltoni, Fauvel, 1932, pp. 219-220, pi. 8, figs 15-19, from Madras, 

 India, in 5-10 fms, is here named S. fawveli, new name. It differs from S. hiltoni 

 Chamberlin in that the first setigerous segment has a pair of subulate and a pair 

 of pinnately divided branchiae ; the second and third setigerous segments have 

 each a pair of pinnate branchiae. In S. hiltoni the first branchial segment is aseti- 

 gerous and its branchiae are unipinnate; the first setigerous segment has a pair 

 of subulate branchiae ; the next two segments have each a pair of bipinnately 

 divided branchiae. 



