384 Scientific Notices. 
it necessary to consider these two animals for the future as the types of 
two distinct genera. 
The accompanying rough sketch of the cheliferous member of the 
larva of the Lobster, ['l'ab. XV. f. 13] in which ais the claw, } the outer 
division of the limb or future flagrum, and c the rudimentary branchia, 
will enable naturalists that may have access to the work of Rathke, to 
institute such a comparison as may probably enable them to decide, 
whether there are any grounds for suspecting that a similar structure 
prevails in that of the River Crawfish. 
Iam, Sir, 
Yours, &c. 
Cork, Dec. 16, 1830. Jno. V. THOMPSON. 
Note on Procellaria Anginho, Hein., and Proc. Bulverii, Selby and 
Jard. 
Procellaria Anjinho described by the late Dr. Heineken in Brewster’s 
Journal, and proposed with some doubt as a new species, proves, according 
to the remark of the Rev. L. Jenyns, to be altogether identical with the 
Sooty Petrel.of Latham’s Synopsis, the Procellaria fuliginosa of Gmelin 
and Latham’s Index, Procellaria Bulverti of Selby and Jardine’s 
Illustrations of Ornithology cannot be considered as differing from the 
same species in any thing but age. Young birds of P. fuliginosa have 
the plumage rather fuller and ‘consequently appear rather larger; their 
tail is either perfectly even or has the middle feathers elongated. But if 
a large assortment of individuals be examined, several constantly occur 
upon which it is impossible to decide whether they belong to the latter 
or to the forked-tail sort, the transitions or variations in this character 
are so gradual and inconspicuous, and are moreover unaccompanied by 
any regular corresponding differences of size or plumage. In no other 
essential point does Proc. Bulverii appear to differ from Proc. Anjinho, 
and both must hereafter merge into synonyms of Proc. fuliginosa, 
Gmel. 
Madera. R. T. Lowe. 
