HELIX. 373 
phery of the one is obsoletely carinated; in the other simply 
rounded. ‘The former was possibly the H. Algira of the tenth 
edition of the ‘Systema;’ the latter, from not coinciding with 
the characters previously assigned, seems, judging from the 
“ Lusitanica” actually written upon it (besides the significant 
numerals 684), to have been reproduced in the twelfth edition 
of the same work as another species. It fairly agrees, too, 
with its diagnosis, but of course can never claim priority, since 
it was not adequately defined. Neither, indeed, could the 
name Lusitaniea (Portuguese) have been applied to the African 
Ampullaria, since even the law of priority must succumb, when 
a too strict adherence to it would perpetuate an error. 
Helix manuntllarts. 
The Helix melanostoma (adusta of Karsten) and an allied 
Species in Born were regarded by the older conchologists as 
the representatives of this Linnean shell; but neither these, 
nor the Natica mammillaris of Lamarck, exhibit the features 
required by the description. They are smooth or nearly so, in 
place of being decussated by distant longitudinal striz and ex- 
cessively close spiral striole. The cited drawing of Argenville 
(“f. lin. 2, n. 7”), whether we take the seventh figure upon 
the second line, or figure 7 upon the third line, does not display 
the required characters, and can only be regarded as a partial 
approximation. It is clear from the expressions “‘nimis mucro- 
nata” and “‘umbilicata” that it was the former (a dorsal view) 
which was intended, the latter, a Limnea, having been quoted 
by Linneeus for the imperforated H. auricularia. The general 
aspect of that engraving, in which the shell is depicted as being 
coarsely striated lengthwise, when modified by the descriptive 
definition, calls to mind some such Natica-like Sigaretus (it is 
declared to be paucispiral, with a capacious aperture), as the 
S. papilla of Chemnitz (Conch. Cab. v. f. 1939).  Récluz, 
indeed, with some boldness, but great probability, has be- 
stowed the Linnean appellation upon an allied species, which 
has been delineated in his Monograph of that genus in the 
‘Tilustrations Conchyliologiques.' I find no shell in the 
