40 HARTMAN 



to occur in European and other seas. This conclusion is based mainly 

 on a study of the marine annelids, which have been remarkably abundant 

 and diversified in many samples, and to a lesser extent on some other 

 groups of invertebrates, especially amphipods and mollusks, which have 

 been examined by authorities on these groups. Analyses are being made 

 of more than 300 measured samples taken by the Velero IV, research 

 vessel of the University of Southern California. More than 283 species 

 of polychaetous annelids have been identified. They have shown that 

 there is a high degree of endemism, not only on specific, but also on 

 generic levels. 



The U.S.S. Albatross, operating jointly under the direction of the 

 U. S. Bureau of Fisheries, the University of California, and Stanford 

 University, had earlier, from March to June 15, 1904, established 276 

 stations, mainly in localities near the Channel Islands of southern Cali- 

 fornia and in Monterey Bay, in depths to 1400 fathoms. The marine 

 annelids were largely studied by Moore (1909 to 1923), who named and 

 described 182 species; of these less than two per cent were cosmopolitan 

 or widely distributed or known from geographic areas extending beyond 

 the northern Pacific Ocean. Most of them have remained nearly or quite 

 unknown except through their original accounts. 



Analyses of the samples which come from the current studies in basins 

 of southern California have revealed the presence of many species named 

 by Moore. Other species are also being identified. Analyses of these 

 samples have consistently shown that polychaetous annelids are the most 

 abundant animals in quantity and diversity in the areas investigated. 



The purpose of this report is to describe a small part of this fauna 

 and to show that some species of cosmopolitan character, which are also 

 present, differ from tj^pical representatives in more distant parts of the 

 world, in morphological characters which may have more than varietal 

 or trivial importance. 



Three benthonic species and one subspecies are described : Cossura 

 Candida, new species in the CIRRATULIDAE ; Myriochele gracilis, 

 new species, and Oiuenia fusiformis collaris, new subspecies, in the 

 OWENIIDAE; and Artacamella hancocki, new genus and species in 

 the TEREBELLIDAE. Records of extended distribution are given 

 for Artacama coniferi Moore. Protis pacifica Moore, a little known deep 

 water serpulid, is reported commensalistic with an undescribed species 

 of Cyclopecten Verrill (Pelecypoda). Poeobius meseres Heath, a pelagic 

 annelid, is discussed, especially for its affinities with the FLABELLI- 

 GERIDAE. 



