92 



Papers from the Department of Marine Biology. 



and the zinc reprecipitated with Na2C03 



any precipitate filtered off, 

 and again weighed as ZnO. 



Iron was estimated in a separate sample, usually 2 grams, by titra- 

 tion with permanganate. Manganese was also estimated in a separate 

 sample, by the colorimetric method, and both, as tabulated below, are 

 calculated to amounts contained in 20 grams of the dry sample. The 

 weights, etc., are given in grams. 



Specimen No. 



614 BC 1.. 

 614 BC2.. 

 614 K 1... 

 614 K 2.... 



614 R 



614 AT. . . 

 614 AU. . . 

 614 D 2... . 

 614EFG.. 



614L 



614 AS... . 

 614 A S 1. . 



614 A S 2. . 

 615E 



615 E 2a... 

 614 C B 1.. 

 614 C B 2.. 

 614 C B 3.. 

 614 A 1... . 

 614 A2... . 



614 N 



614B Q. . . 



Sample taken 

 for analysis 



20 gram3 of liver. . 

 20 grams of liver. . 

 20 grams of liver . . 

 20 grams of liver . . 

 20 grams of tissues 

 20 grams of liver . . 

 5 grams of liver . . . 

 20 grams of tissues 

 20 grams of tissues 

 20 grams of tissues 

 10 grams 



2 grams of liver. . . 

 20 grams of liver. . 



20 grams 



10 grams^ 



15 grams 



20 grams 



3 grams 



20 grams 



20 grams 



20 grams 



20 grams 



Weight 

 complete. 



4,365 

 3,705 

 4 , 265 

 3,730 

 770 

 21,015 

 1,765 

 2,925 

 8,. 368 

 1,225 

 1,515 

 1,515 



450 



2,670 



2,670 



2,215 



395 



Weight 

 of shell. 



2,990 

 2,595 

 2,875 



2,485 



610 



17,835 



1,527 



2,555 



7,046 



787 



Weight 

 of tissues. 



1,375 

 1,110 

 1,390 

 1,245 



160 

 3,180 



238 



370 

 1,322 



438 



'190 



1,945 

 725 



Weight 



of liver. 



157 

 105 

 405 

 315 



585 

 57 



1201 



22 



67 



1,035 



18.5 



Specimen No. 



Weight dried 

 at 1 10= C. 



Copper. 



ZnO 



Fe 



MnO 



PbOo 



614 BC 1. 

 614 BC 2. 

 614 K 1... 

 614 K 2... 



614 R 



614 AT. . 

 614 AU. . 

 614 D 2... 

 614 E FG. 



614 L 



614 AS... 

 614 AS 1. 



614 AS 2. 



615 E 



615 E2a. . 

 614 C B 1. 

 614 C B 2. 

 614 C B 3. 

 614 A 1. . . 

 614 A 2. . . 



614 N 



614B Q... 



269.2 

 =45.1 



2180.8 



2136 

 41.5 



2175.9 



28.1 



81.5 

 322 

 101 



117.0 

 4 



31.7 

 219 



17.24 



22.4 



92 

 5.4 

 404 



74 

 215 



44 



. 0434 

 .0745 

 .0007 

 .0019 

 .0006 

 .0006 

 .0008 

 .0025 

 .0002 

 .0007 

 .0140 

 .0180 

 .0222 

 .0034 

 .0170 

 . 00027 

 .0003 

 .0022 

 Trace 

 .0004 

 .0003 

 .0004 



'Blood. 



. 0036 

 .0123 

 .0019 

 .0014 

 .0014 

 .0019 

 . 0076 

 .0051 

 .0038 

 .0077 

 None. 

 .0040 

 . 0038 

 .0133 

 .0014 

 .0011 

 .0016 

 .0020 

 .0043 

 .0013 

 .0006 

 .0032 



0.0121 

 .0208 

 .0108 

 .0081 

 .0112 

 .0176 

 .0397 

 .0193 

 . 0073 

 .0114 

 .0175 

 .0057 

 .0056 

 .0054 

 .0057 

 .0079 

 .0087 

 .0124 

 .0057 

 .0002 

 .0235 

 .0229 



0.00022 

 . 00020 

 .00016 

 .00008 

 .0011 

 . 00355 

 . 0043 

 .0021 

 .0022 

 .00016 

 .0014 

 .000016 

 Trace 

 .0001 

 .00084 

 .0002 

 .0002 

 Trace 

 Trace 

 Trace 

 .0002 

 .0002 



0.00005 

 .00005 



-Liver. 



