of the Sertularia Gelatinosa of Pallas. 89 
stems are united for mutual support, in such a manner, as to pro- 
duce a compound stem, equally uniform in its outline, and sym- 
metrical in its arrangement, as those in which the stem is simple, 
— such as S. verticillata, halecina and gelatinosa. But, along 
with these differences of structure, there is no corresponding 
arrangement of denticles and vesicles, so that this character 
which appears at first sight natural, is in reality but of subordi- 
nate importance. 
The S. gelatinosa is not recorded as British by Berkenhout 
or Turton. It is noticed as such, however, by Stewart, in his 
Elements of Natural History, p. 444, without any reference or 
authority. Pallas indeed quotes, Corallina confervoides, 
gelatinosa alba, geniculis crassiusculis, pellucidis, Ray, Syn. 
p. 34. No. 7.,” as synonimous with his S. gelatinosa. Ellis con- 
siders the species of Ray as the S. spinosa. We suspect that 
Ray referred to neither of these species, but to the S. genicula- 
ta, with which his characters strikingly correspond. It is not 
probable, that so acute a naturalist would have omitted the 
distinctive characters of the species which we have been con- 
sidering, had it ever come under his. inspection. 
As soon as circumstances permit, it is my intention to submit 
the genera and species of British Zoophytes to a critical exami- 
nation, for the purpose of extricating them from the confusion 
in which they are involved, adding to their number several un- 
described species which I possess, and preparing for the investi- 
gation of the extinct races which occur in a fossil state in the 
strata of Scotland. 
Manse of Flisk, I 
October 1819. j 
Art. XIV. — An Account qf a Map of the Countries subject to 
the King of Ava, drawn by a Slave of the King^s Eldest 
Son. By Francis Hamilton, M. D. & F. R. S. & F. A. S. 
Lond. & Edin. Communicated by the Author 
During my residence in the Empire of Ava, from the 19th 
of March until the 27th of November 1795, I procured from 
* This map will be given in next Number, along with the conclusion of the 
Memoir. 
