MUREX. 297 
when he first constituted the species, and evidently altered his 
ideas when he published his final edition, for he there queries 
the cited figure of Argenville. Now this drawing, although ill 
executed, is not unimportant; it appears to have been designed 
for the Purpura pica, and that shell alone of those referred to 
corresponds with the expression “ apertura transversim striata.” 
It might, also, be declared somewhat spinous in four rows, for 
although the two upper series of spinous knobs are the more 
conspicuous, there are, likewise, obsolete nodosities upon and 
above the canal. 
In the synonymy of the ‘ Museum Ulrice’ hystrix, galeodes, 
and pica have each a single representative figure, but the ‘‘ albo 
nigroque varia” suits the latter alone. Indeed, the whole 
description is so applicable to pica, especially the “ spine, serie 
triplici” (for the canal belt cannot, without straining, be termed 
spinous) and the “apertura edentula,’ that Karsten has de- 
scribed that shell as the hippocastanwm of Linneeus. 
Turex senticosus. 
The Phos senticosus of authors (Chemn. Conch. Cab. vol. x1. 
f. 1864) is marked for this shell in the Linnean collection. 
The cited engravings, although each of them conveys some 
idea of one or more of the characteristics, are very unsatis- 
factory; the I of Gualtier, and, at the least, the 47 of Seba 
must certainly be excluded; and however much resemblance 
to it may be found in Bonanni’s rude figure, his drawing, as we 
learn from the explanatory text, was not designed for it, being 
a magnified representation of a minute Adriatic shell. Again, 
Argenville’s figure is much too large for it, and, as well as 
45, 46 of Seba, too short-spired. The new references added in 
the revised copy, “‘ Rumph. Mus. t. 29, f. N”’ and ‘ List. t. 967,” 
are somewhat more illustrative, although the former is very 
rude, and the latter by no means a certain delineation of the 
species. The generic allocation was scarcely decided upon by 
Linneus, who has written “ Inter Buccina simile” in his own 
copy: 
2Q 
