398 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



West Indian region. Augener (1927) recorded one species from southern 

 and southeastern Austrah'a. On the other hand, Fauvel (1927) described 

 13 species in 9 genera in the fauna for western and southern France; 

 Fauvel again (1932, pp. 192-198) reported 7 species in 6 genera from 

 India; and Annenkova (1938, p. 89) reported 5 species in 3 genera from 

 the Japanese Sea. Furthermore, the collections of the Allan Hancock 

 Foundation of The University of Southern California include representa- 

 tives of 18 species in 10 genera of which 14 species originate from Cali- 

 fornia and Lower California, one from Oregon, 3 from eastern United 

 States, and one from England. In addition, Notomastus luridus Verrill 

 has been made available from Yale University. The total number of 

 species consulted numbers 19 and 4 others are reviewed (see the follow- 

 ing list). 



It is largely to the credit of the facilities and the operations of the 

 Velero III under the able command of Captain Allan Hancock that 

 these valuable materials have been obtained. It is a pleasure and privilege 

 to acknowledge thanks and support to the Administration of The Uni- 

 versity of Southern California and the Direction of the Allan Hancock 

 Foundation for permission to study these unusual and interesting 

 materials. I wish to express thanks also to the personnel of the Peabody 

 Museum of Natural History, Yale University, for the loan of valuable 

 materials. 



The preparation of the plates for the capitellids has been unusually 

 well performed by the staff artist, Mr. Anker Petersen, whose skill and 

 workmanship have resulted in careful delineation of characters such as 

 has never been attempted heretofore for this difficult and little-known 

 group. The highly magnified details of significant setal structures have 

 been worked out with great patience and accuracy in their true 3 dimen- 

 sional relations resulting in discoveries that had not been surmised previ- 

 ously. These characters are amplified under each species discussed. To 

 Miss Dolores Hahn I extend thanks for aid in typing copy. 



List of Species 

 (Those preceded by an asterisk could not be examined for this report.) 



1. Capitella capitate (Fabricius) 



2. Capitella dizonata Johnson 



3. Capitella ovincola, new species 



4. Mediomastus calif or niensis Hartman 



