TROCHUS. sila 
Now all these features, as well as those included in the diagnosis, 
are present in the specimen preserved in the marked receptacle 
of this species in the Linnean cabinet. Of this shell (pl. 3, f. 7) 
I know no adequate delineation in the older writers; no wonder, 
then, that our author’s synonymy was incorrect, and that his 
Species, consequently, has never been satisfactorily identified. 
For, although, by a kind of tacit assent, the supposed recogni- 
tion by Chemnitz, who, nevertheless, has called it 7’. sanguino- 
lentus, Nicobaricus, &c. (Conch. Cab. vol. v. pl. 168, f. 1615 to 
1618), has been generally accepted, it has not escaped the 
acumen of Deshayes that the Chemnitzian shell was not 
identical with the Linnean maculatus. This conclusion he 
arrived at through a critical analysis of the synonyms. For 
had our author wished to indicate the supposititious maculatus, 
he would have cited plate 61, f. DD, of Gualtier (a by no means 
uncharacteristic representation of it), and not his plate 61, f. EK, 
which latter, although not precisely the species intended, is yet 
the nearest approximation to it of any of the old drawings then 
extant, and was evidently selected from the many allied T’rocht 
engraved on that plate, on account of its broad base, its de- 
pressed conic shape, and its large flammules. The figures in 
Rumphius were possibly quoted because of the folds at the 
base of each whorl, or perhaps were left bekind, when Niloticus 
was severed from it, from not being held sufficiently charac- 
teristic of that shell; they are meant, says Deshayes, for the 
young (marmoratus) of Niloticus ; so, too, was the cited figure in 
Argenyille, according to Lamarck. The rudeness of Bonanni’s 
engraving forbids any precise appropriation of it; it presents, 
however, the general features of the group in which maculatus 
is included. The subjoined description of the Linnean specimen 
is rendered necessary by the obscurity of the species :— 
Shell broadly conical, strong, not much elevated, dilated at 
the base, irregularly radiated from the apex with dull reddish 
crimson large flame-like spots, which occupy (in this individual) 
a larger portion of the surface than the whitish ground. General 
outline of the sides arcuated. Whorls about seven, distinctly 
sutured, a little concave above, slightly imbricating each other 
below; each of the principal ones adorned with five rows of 
moderately-sized closely-disposed oblique tubercles, that are 
linear and broadest on the first series, longitudinally oval on 
298 
