290 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 19 



The following samples, numbered 1 to 31 on the charts, come from 

 the San Pedro slope, in depths of 60 to 446 fms. Polychaeta, echinoderms 

 and mollusks are listed on the charts by increasing depths; others are 

 summarized in the following analyses. 



1. Sta. 2292 (no. 104). Upper end of San Gabriel sea valley, in 60 

 fms. OPG took 0.81 cuft of fine grayish green sand, with many animals. 

 In addition to those named on the chart, the following were present : 

 Harenactis (1), Monobrachium (2 colonies), a nemertean (2), a tur- 

 bellarian (1), four amphipods (113), an isopod (2^), ostracods (many) 

 and a mysid ( 1 ) . The largest species was Lumbrincris bicirrata ; the most 

 abundant were Amphiodia urtica (177), Adontorhina cyclia (78), Ali- 

 gena sp. (74), Atnphipholis squaniata (53), and Chloeia pinnata (47). 



Numbers of species and specimens totalled : 

 polychaetes 53 species, 350 specimens 



echinoderms 11 310 



mollusks 15 191 



crustaceans 6* 122* 



others 2 3 



Total: 87* species, 976* specimens 



2. Sta. 5746 (near no. 129). SW of Newport, in 68 fms. OPG took 

 1.13 cuft of light green, foraminiferan sand with many animals. In addi- 

 tion to those named on the chart, the sample contained a nemertean (3), 

 a sipunculid (1), 16 amphipods (86), three isopods (7), two or more 

 tanaids (20) six ostracods (236) and a juvenile crab (1). The largest 

 individual was Antiplanes ^perversa, and the most abundant species were 

 Onuphis nebulosa (135), Tharyx tesselata (36), and JMagelona pacifica 

 (20). 



Numbers of species and specimens totalled : 

 polychaetes 48 species, 429 specimens 



echinoderms 2 3 



mollusks 6 13 



crustaceans 3Z 369 



others 3 8 



Total : 92 species, 822 specimens 



3. Sta. 5747 (near no. 123). 9.2 mi south of Los Angeles light, in 

 90 fms. OPG took 0.88 cuft of very fine green sand. Wet weight of the 

 larger animals was 96.7 grams, of which echinoids were 62.7, ophiuroids 

 17.0, polychaetes 16.6, and all others less than 0.5 grams. In addition to 



