198 Scientific Intelligence. ’--Chemistry. 
fore part of the liver, are two in number, consist of numerous 
distinct lobes, of a rose-red colour, and were formerly considered 
as the ovarium of this animal. It appears, however, that they 
surround the two biliary canals during their whole course from 
the liver to the spiral stomach, and communicate freely with the 
interior of these canals, by numerous small ducts. They are al- 
ways present, and equally developed, in the male and female, 
and have no organic connection with the organs of generation. 
Coloured size injection thrown into the digestive canal, passes 
up from the spiral stomach, through the two biliary ducts, and 
fills these glandular lobes in its passage. From the connection 
of these glands with the biliary system, Dr Grant considers 
them as analogous to the conglomerate pancreas of the skate, and 
other chondropterygious fishes, and is thus inclined to believe 
that this important digestive organ occurs lower in the scale of 
animals than is generally supposed. Dr Grant illustrated his 
observations, by numerous specimens of the male and female, 
showing the viscera in their natural as well as injected state. 
24. On the existence of a Pancreas in the Doris Argo.— Dr 
Grant has made some interesting observations on the nature of 
the glandular vermiform appendix opening into the stomach of 
several gasteropodous Mollusca, as the Aplysia, the Doris, &c. 
From the relations of this small glandular caecum to the biliary 
system and alimentary canal of these animals, and from its par- 
ticular structure, Dr Grant considers it as quite analogous to 
the small pyloric caeca, or proper pancreas, of osseous fishes, 
though representing that organ under a much simpler form. 
Several specimens of the Doris Argo were lately exhibited to the 
Wernerian Society, (See Proceedings of that Society, supra, 
p. 183.), showing the connections of this pancreatic appendix 
with the stomach and liver. 
CHEMISTRY. 
25. Iodine discovered in various marine productions. — Soon 
after the discovery of Iodine, Messrs Gaultier de Claubry 
and Colin pointed out starch as the most sensible of the re- 
agents that manifest its existence. It is in fact sufficient to pour 
an aqueous solution of this vegetable substance into the liquid 
supposed to contain iodine, to produce immediately a blue colour, 
