NO. 2 



OLGA hartman: submarine canyons 



105 



3. Santa Monica canyon, Sta. 7517, in 695 meters, axis, mud and 

 sand. The photograph (Fig. 22) shows at least 7 hooflike depressions 

 of brissopsids (only one specimen taken) and a large dead Brisaster, 

 measuring 40 x 32 mm, spread out at surface, in upper center (also 

 taken), together with 12 short-armed ophiuroids (5 taken, of which 

 only O phioinusiuni and Ophiocynodes, with 3 specimens, are of this 

 kind). The many small holes and mounds may represent the burrows of 

 small clams and polychaete tubes. The Analyses (see below) name 37 

 species and 206 specimens. Largest individuals are Solemya, 40 x 15 mm 

 and Cal/ianassa 45 mm long without chela, most abundant are small 

 white clams. 



iJ^Utt 



Fig. 22. Santa Monica canyon, Station 7517, in 695 meters. The 

 camera line follows diagonally across the left half of the 

 picture. The large hooflike depressions are those of bris- 

 sopsids. There are at least twelve ophiuroids and a large 

 dead Brisaster, the latter near the upper edge of the photo- 

 graph. The numerous holes and elevations are of smaller 

 animals. 



