52 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



mately into 2 groups: one, to which D. cuprca (Bosc) belongs, having 

 comb setae with many fine teeth, and another, to which D. neapolitana 

 delle Chiaje belongs, having comb setae with a few coarse teeth. Monro 

 (1930, p. 124) has partly refuted Augener's conclusions, in distinguish- 

 ing D. punctifera Ehlers from D. cuprea — 2 species which were consid- 

 ered identical by Augener. 



Fauvel (1933, pp. 28-37) has attempted to separate the various spe- 

 cies of this genus, based only on the character of the comb setae, and has 

 come to the conclusion that actually only one valid species, D. neapolitana 

 delle Chiaje, exists. According to Fauvel, the known species might be 

 grouped as follows, based on the character of the comb setae: 



1. Comb setae with few (6 to 12) teeth, including D. neapolitana delle 

 Chiaje, D. variabilis Southern, D. sugokai Izuka, D. monroviensis 

 Augener, D. viridis Kinberg, D. splendidissima Kinberg, D. dentata 

 Kinberg, and D. chiliensis Quatrefages. 



2. Comb setae with many (14 to many) teeth, including D. cuprea 

 (Bosc), D. fragilis Ehlers, D. spiribranchis Augener, D. punctifera 

 Ehlers, D. neapolitana (of Crossland, 1903, and Fauvel, 1930 and 

 1932), D. aniboinensis Willey, D. musseraensis Augener, D. brasil- 

 iensis Kinberg, D. amoena Kinberg, D. longicornis Kinberg, and D. 

 leuckarti Kinberg. 



It will be noted that D. neapolitana occurs under both lists. D. cali- 

 fornica and D. ornata are not included in this list, but the first would be- 

 long to the group in which comb setae have few teeth, and D. ornata 

 would fall in that in which comb setae have many teeth. In conclusion, 

 Fauvel would refer all of these names to the well-known European form, 

 D. neapolitana, conserving this name rather than the older D. cuprea 

 (Bosc), since it has received wide acceptance by European authors. 



From all that has been written about the genus Diopatra, it seems that 

 too great stress has been placed on a single character, the nature of comb 

 setae, with concomitant neglect of other available characters. Thus, the 

 development of unusual features in anterior parapodia, arrangement of 

 glandular structures on antennae, minute details of setae, kind of tube, 

 etc., when taken together, appear to afford a more accurate criterion for 

 speciation than those characters heretofore accented. 



Many species of Diopatra have been described, or reported, from the 

 Western Hemisphere; because of incomplete data I am unable to place 

 them in the scheme proposed below. These species include the following: 

 1. D. agave Grube (1869, p. 59) from Desterro [Florianopolis], Bra- 

 zil. (This is known only through an original fragmentary account.) 



