NO. 2 HARTMAN : QUANTITATIVE SURVEY 203 



Euchone arenae has been taken near Redondo Beach, in 9.5 fms, off 

 Point Fermin, in 34 fms, and off Point Loma light, in 23 fms, in sedi- 

 ments of reddish brown sand. 



Euchone incolor Hartman, 1965 



Euchone incolor Hartman, 1965:231-232, pi. 51. 



Collections: Sta. 2298 ( 15) ; Sta. 3585 (3). 



Total length, excluding the tentacular crown, is 2.1 to 2.2 mm; 

 width is 0.3 mm ; segments include 8 thoracic and 8 abdominal setigers. 

 The body is slender and linear. The flaring tentacular crown consists of 

 four pairs of radioles, each with paired rows of pinnules ; they extend 

 distally for a length nearly one-fourth that of the body. A pair of slender 

 cirriform radioles is present at the ventralmost end of the crown. The 

 thoracic collar is large, voluminous and covers most of the peristomium ; 

 it has a straight, continuous margin, and is incised middorsally. Eyes have 

 not been distinguished. The anal groove extends through the last three 

 segments. Collar setae are slender, limbate and number about five in a 

 fascicle. Other thoracic notosetae are slender and limbate ; neurosetae are 

 long-handled uncini with a large fang, surmounted by three smaller teeth. 



Previously known from the western Atlantic Ocean, in shelf to 

 abyssal depths (Hartman, 1965, p. 232), this is here recorded from the 

 Lasuen sea mount, in 68 fms, and off Farnsworth bank, in 23 fms. 



Euchone hmicola Reish, 1959, redescribed 



(Plate 6, Figs. 7-10) 

 Euchone Hmicola Reish, 1959:717-719, figs. 1-5. 



Collection: Type collection from Alamitos Bay marina, and Long 

 Beach outer harbor. 



Length of the body is 8 mm of which the crown measures 2 mm ; seg- 

 ments include 8 thoracic and 18 abdominal, of which the last 10 setigers 

 are involved in the anal groove (Fig. 10). The tentacular crown consists 

 of seven pairs of radioles, each with many filaments in pairs; the palmate 

 membrane is very low and nearly lacking. Ventral scutes or glandular 

 areas continue through seven thoracic setigers; the last one is least devel- 

 oped, and all are transversely divided, in line with the biannulation of the 

 thoracic segments. Thoracic notosetae are of two kinds; the superior ones 

 are longest and slenderly limbate; the inferior ones are abruptly shorter, 

 and broadly limbate (Fig. 7). Abdominal uncini are avicular, with short, 

 thick base, large, curved fang surmounted by many teeth in four to six 

 transverse rows (Figs. 8, 9), each row with four to seven teeth. 



