NO. 2 HARTMAN : QUANTITATIVE SURVEY 389 



PHOTOGRAPHIC RECORDS ALONG THE LEEWARD 

 SIDE OF SANTA CATALINA ISLAND 



The sea bottoms on the leeward side of Santa Catalina Island were 

 sampled with a Campbell grab equipped with camera. I am indebted to 

 Professor K. O. Emery, Woods Hole Oceanographic Institution, for the 

 copies of the photographs. The methods for taking the samples were like 

 those described in the canyon report (Hartman, 1963, p. 102). The 

 Campbell grab, with coverage of about a fourth of a square meter, was 

 equipped with camera and lights, and lowered so that the size of the 

 photograph and the surface taken by the grab were about equal. There 

 was reasonable agreement with what the pictures revealed, and the 

 numbers and kinds of larger surface organisms taken in the grab. 



1 he locations of photographs and their analyses are listed in the 

 chart and summaries, below. 



1. Sta. 7707 (N of no. 250), off Abalone Pt.. in 22.5 fms. The 

 photograph (PI. 8, top) shows numerous slender, projecting tubes of 

 Tclepsavus cost arum, and larger, recumbent tubes of Chaetopterus vario- 

 pfdatus (the largest tubes measured 225 by 18 mm) ; three echinoids and 

 two cone-snails are seen on the surface. The largest animals in the sample 

 are shown (PI. 8, bottom). Analyses revealed the presence of 21 species 

 and 155 specimens; in addition to those listed in the chart (see below), 

 there were bryozoan clusters, an amphipod (1), a commensal crab (1) 

 and an ascidiaii. Largest were (Jhnetoptcrus and Lytechiniis. 



2. Sta. 7719 (N of no. 250). Shelf off Abalone Pt., in 23.5 fms. The 

 photograph (PI. 9, top) shows a silty surface interrupted by two tubes of 

 (jfuutoptcrus vnriopedatus, distal ends of slenderer tubes of Tclepsavus 

 costaru/n, and Lytcchinus ananiesus. Other animals in the sample resem- 

 ble those from Sta. 7707. The photographs appear different because the 

 surface is more completely silt-covered in the second than in the first. 



3. Sta. 7720 (N of no. 253). Shelf off Abalone Pt., in 23.5 fms. 

 The photograph (PI. 9. bottom) shows a bottom similar to that in the 

 preceding one, except for the presence of a seastar, Mcdiastcr acqualis. 

 (jhaetoptcrus and Tclepsavus were the most prominent organisms. 



4. Sta. 7723 (near no. 250). Shelf off jewfish Pt., in 39.5 fms. The 

 photograph ( PI. 10, top) shows a level silty bottom, with rocks project- 

 ing at lower left, overgrown by solitary corals, and a smaller clump of 

 the same in the upper left-hand corner ; an ophiuroid arm is seen in upper 

 right, and the surface shows pittings of smaller organisms embedded in 



