NO. 2 HARTMAN, RARNARD: BENTHIC FAUNA OF DEEP RAS1NS 111 



Pacific Ocean. It is the largest of the paraonids and is characterized by 

 a very long prostomial antenna and a large, 3-lobed prostomium. Bran- 

 chiae are present from the third setigerous segment and number 12 to 

 26 pairs. 



The best represented sample comes from Santa Cruz Basin (Sta. 

 5925) with 25 specimens; another from San Clemente Basin (Sta. 

 5942) yielded 10; one from West Cortes Basin (Sta. 5940) contained 

 14 large individuals, and the outermost sample from Patton escarpment 

 (Sta. 5938) contained 6. In southern California this species may have 

 its greatest concentrations at basin depths; in shallower bottoms it is 

 largely replaced by other species of the genus (see below). 



Aricidea nr. suecica Eliason, 1920 

 Hartman, 1957, pp. 319-320, pi. 43, fig. 7. 



Individuals come from Santa Barbara, San Pedro, Santa Catalina 

 and West Cortes Basins ; they usually number few to a sample and indi- 

 viduals are smaller than those from shallower depths. Most have small 

 pigmented eyespots at the posterior margin of the prostomium, or they 

 are more or less faded to invisible. The species is more widely known 

 from western Europe, southern California and western Mexico (Hart- 

 man, 1957, p. 320). 



Aricidea lopezi Berkeley and Berkeley, 1956 

 Berkeley and Berkeley, 1956, p. 542, figs. 1-3. 



This was taken in San Pedro and West Cortes Basins and the Patton 

 escarpment. Branchiae are first present from the fourth segment and 

 number 17 to 18 pairs; they increase in length posteriorly, are thick at 

 the base, and taper distally to a long, slender tip. In postbranchial seg- 

 ments the neuropodia carry hooks that are distally knobbed and covered 

 with a long pointed cap (Berkeley and Berkeley, 1956, figs. 1-3). 



This species has been found more abundantly on shelf and slope depths 

 of southern California and was partly confused with Aricidea nr. suecica 

 in an earlier report (Hartman, 1957, p. 319). From the latter it differs 

 in being smaller, with an inflated instead of cylindrical thorax, and bran- 

 chiae increase in length posteriorly instead of being uniformly large. 



Aricidea lopezi is known more widely from western Canada in about 

 1 fm depths. 



