■iS Vmversitij of California Publications in Zoology [Vol.15 



15j^,. Any section cut by the coast line is designated in one of three 

 ways: when its center is within 2'5 west of the coast, the number is 

 bracketed, when it is within 2'5 north or south the subscript or ex- 

 ponent, as the ease may be, is bracketed, and when it is within 2f5 both 

 west and north or south the entire symbol is bracketed. Thus (15)„ 

 implies that the center of the section is within 2^5 west of the coast, 

 15, ji, that it is within 2f5 north or south, and (15„) that it is within 

 'I'.b both west and north or south of the coast. 



B. Hydrogr.vphic Dat.v 

 EXPLANATION OF TABLE 1 

 This table includes all the temperature, specific gravity, and salinity 

 determinations made from 1901 to 1912 relative to the ocean. San 

 Diego Bay data are excluded unless made in connection with the ocean 

 work. The few determinations of 1901 were made by Professor W. J. 

 Raymond, and all the others by 6. F. McEwen assisted by H. C. 

 Burbridge. Soundings are not entered in this table but a list of water 

 samples whose distances from the bottom are known to he within 

 fifteen per cent of the depth is given in Appendix III. 



First column. — Water-sample numbers entered in chronological order irre- 

 spective of the nature of the sample. 



Second column. — Time when the samjde was obtained entered to the nearest 

 minute. 



Third coJumii. — Section; for explanation see page 46. The letter B indicates 

 that the sample was made in San Diego Bay. 



Fourth and fifth columns. — Latitude and longitude; for error see pages 18 

 and 4.5. 



Sixth column. — Liepth of sample, entered to the i earest meter above iOO 

 and to the nearest five below that depth; for error see page 20. 



Seventh column. — Temperature iti situ; for accuracy see pages 14 and 17. 



Eighth, ninth and tenth columns. — Specific gravity of the sample under atmos- 



0° 

 pheric pressure, the 1.0 being omitted; S tot; that of the sample at 0° C re- 



17?5 

 ferred to distilled water at 4° C; S ^r^r that of the samiile at 17?.5C referred to 



17.5 

 t° 

 distilled water at 17?5 C; Sts^ density in situ referred to distilled water at 4° C. 



Eleventh column. — Salinity per mille of the sample. It was determined with 

 a pycnometer (see p. 28) unless followed by the letter h, which indicates a 

 hydrometer determination (see p. 30), or the letter c, which signifies that 

 Mohr's titrimetrie method was used (see p. 32). The letter I: indicates that 

 the sample was collected with the Kofoid water bottle (see p. 11), the tem- 

 perature being measured and corrected as described on page 14; all other sub- 

 surface samples were collected with Ekman reversing water bottles fsee p. 

 12) and the temperatures measured with Eiehter reversing thermometers (see 

 p. 1.5). A question mark indicates that a small error in depth, temperature, or 

 salinity is suspected (see pp. 20 and 26). 



