Analytical Search for Metals in Tortugas Marine Organisms. 93 



DESCRIPTIONS OF SPECIMENS ANALYZED. 



614 B C 1. Fasciolaria gigantea; horse conch; liver of an immature male. 



614 B C 2. Fasciolaria gigantea; liver of a much older individual, sex not noted. 



614 K 1. Cassis (?) ; queen conch; liver only; sex not noted. 



614 K 2. Cassis (?) ; queen conch; liver only; sex not noted. 



614 R. Strombus biluberculatus; all soft parts of 6 females are represented in the samples analyzed. 



614 A T. Strombus gigas; represents the livers of 8 individuals of both sexes. 



614 A U. Strombus gigas; the liver of a much younger individual than any included in 614 A T. 



614 D 2. Strombus gigas; represents all the soft parts of a single individual with a very old, 



battered, and thick-lipped shell. 

 614 E F G. Strombus gigas; represents all the soft parts of 3 individuals, all in the first year of 



maturity. 



614 L. Fulgur perversus; represents all the soft parts of 4 adult individuals. 

 614 A S. Palinurus; crayfish; represents the blood only. 

 614 A S 1. Palinurus; crayfish; liver of a single individual. 



614 A S 2. Palinurus; crayfish; liver of a much larger individual. 



615 E 1. Limulus polyphemus; livers, ovaries, and testes of four individuals, two males and two 



females, collected at the Marquesas. 

 615 E 2a. Limulus polyphemus; 190 c.c. of blood. 

 614 C B 1. Aplysia; sea cat; one complete individual. 

 614 C B 2. Aplysia; sea cat; five complete individuals. 

 614 CBS. Aplysia; sea cat; the livers of two individuals. 

 614 A 1. Holothuria bermudiana; muscular tissue, etc., of several large individuals, less the 



intestines. 



614 A 2. Holothuria bermudiana; intestines of the individuals in 614 A 1. 

 614 N. dona atra; black tunicate, living on the walls of the moat of Fort Jefferson. 

 614 B Q. A gray tunicate also from the moat of Fort Jefferson. 



The constant occurrence of both copper and iron in the analyses is 

 to be expected, but the large amounts of copper in some and its 

 variability, even in individuals of the same species, is to be noted. 

 Zinc is present in all the specimens analyzed except the crayfish blood, 

 and as the sample was exhausted in the first analysis this could not 

 be tested further. Since the Tortugas Islands are far removed from any 

 possible contamination of the sea-water, zinc must be considered as a 

 normal constituent of these forms. Manganese is present in all the 

 specimens analyzed, but varies considerably. The most remarkable 

 occurrence, however, is that of lead in the liver of Fasciolaria gigantea 

 in quantity just sufficient to weigh, in a 20-gram sample of dried liver, 

 but quite enough to yield good qualitative tests. 



