296 SPECIES OF THE SYSTEMA. 
with the details of that work that we may reasonably accept of 
the traditional identification. It must not, however, be con- 
founded with the species of the ‘Systema,’ as its columella is 
perfectly smooth. 
Murex Hippocastanun. 
Why the Purpura termed hippocastanum, from a belief in its 
identity with this Linnean species, should ever have been 
selected as its representative, seems passing strange, for not 
one of the many figures cited in both editions of the ‘Systema’ 
was designed for it. And this was not for want of correct pub- 
lished delineations of that well-known shell, since it had been 
portrayed by Regenfuss (pl. 2, f. 18), Gualtier (pl. 43, f. V.), 
Seba (iii. pl. 52, f. 67; pl. 60, f. 12), &&. The “apertura — 
edentula” of the ‘Museum Ulrice’ shows that it was not de- 
signed in that publication. The fairest way to ascertain what 
our author really intended when he constituted the species 1s 
to strictly contrast the characters of the shells delineated in 
the engravings referred to with the features demanded by the 
diagnosis. ‘The painting of Regenfuss was decidedly meant 
for the Purpura hystria of authors, and Klein’s copy of Rum- 
phius, pl. 24, f. C (cited, likewise, in the ‘Museum? and in the 
tenth edition of the ‘ Systema’) probably represents the same; 
the figures, at all events, exhibit, as in that species, more than 
four rows of spines, and hence are excluded, as illustrative, by 
the word “quadrifariam”: Gualtier (pl. 31, f. F) has in- 
accurately, and Rumphius, in his plate 24, f. 4, somewhat more 
correctly, depicted the Pyrula galeodes ; the “4” was possibly, 
however, a typographical mistake for the previous ‘“ C,” since 
the attached name belongs to C, and Klein’s engraving (a copy 
of C) was still retained, as a synonym, in the twelfth edition of 
the ‘Systema,’ where alone the 4 has been substituted. Be 
that as it may, galeodes suits not the “apertura transversim 
striata” of the description ; hence the name cannot be assigned 
to that Pyrula, although a specimen of it is marked, in the 
Linnean cabinet, with the numerals indicative of that shell. 
Our author, judging from his list, did not possess an example 
