TROCHUS. 
Prats IV. 
Species 16. (Mus. Cuming.) 
TROCHUS EXALTATUS. 
foratd, albidd, olivaceo rufoque pallidé maculata ; an- 
fractibus converis, rugoso-granatis, ad suturas nodatis, 
deinde longitudinaliter costatis, costis brevibus, tumidis, 
in anfractu ultimo diminuentibus, interstitiis fuscescen- 
tibus ; basi concavo-pland, densé minute sulcatd, colu- 
melld subcalloso-contorta. | 
Tue EXALTED TRocHus. Shell turreted-conical, imper- 
forate, whitish, faintly spotted with olive and red; 
whorls convex, rugosely grained, noduled at the su- 
tures, then longitudinally ribbed, ribs short, swollen, 
diminishing on the last whorl, interstices brownish ; 
base concavely flattened, densely minutely grooved, 
columella slightly callously twisted. | 
Puriprr, in Kiister, Conch. Cab. Trochus, p. 108. pl. 17. | 
it, Se 
Hab. Moluccas. | 
Troch. testa turrito-conicd, imper- 
Chiefly distinguished by the short puffy character of the | 
ribs, crossing the lower portion of the whorls, which is 
swollen into the form of an encircling collar. 
Species 17. (Mus. Cuming.) 
TRocHUS CRENULATUS. Troch. testd timperforatd, sub- 
obeso-conicd, alveariformi, albidd, viridi vivide tinctd ; 
anfractibus oblique longitudinaliter granatis, ad sutu- 
ras concavis, deinde tumidis, verrucoso-costatis ; bast 
concavo-pland, dense liratd, versus marginem granata. 
THE CRENULATED Trocuus. Shell imperforate, rather 
stoutly conical, hive-shaped, whitish, brightly stained 
with green; whorls obliquely longitudinally grained, 
concave at the sutures, then swollen, wart-ribbed ; 
base concavely flattened, densely ridged, grained to- 
ward the margin. 
Lamarck, Anim. sans vert. vol. ix. p. 140. 
Pyramis crenulatus, Adams. 
Hab. Philippine Islands; Cuming. 
The grained sculpture of this species gives a crenulated 
character to the sutures. 
Species 18. (Mus. Cuming.) 
TROCHUS FENESTRATUS. 
midali, albidd, viridi maculatd ; anfractibus undique 
Troch. testa imperforata, pyra- 
rugoso-crenulatis, longitudinaliter costatis, costis brevi- 
bus, verrucosis, albidis ; basi planatd, acute suleatd. 
THe Larticep Trocuus. Shell imperforate, pyrami- 
dal, whitish, blotched with green; whorls wrinkle-cre- 
nulated throughout, longitudinally ribbed, ribs short, 
warty, whitish ; base flattened, sharply grooved. 
GMELIN, Syst. Nat. p. 3582. 
Trochus pyramidalis asper, Chemnitz. 
Pyramis fenestratus, Adams. 
Hab. Philippine Islands. 
This and the preceding may prove to be different states 
of the same species; but the present is more pyramidally 
conical, and the ribs are more prominently developed. 
Species 19. (Mus. Cuming. 
Trocuts Mauritianus. Troch. testd imperforata, py- 
ramidali-conicd, solidiusculd, albidd, pallidé rubro vi- 
ridique variegatd ; anfractibus convexo-declivibus, obli- 
que longitudinaliter grancso-corrugatis et squamato- 
tuberculatis, tuberculis versus basin evanidis; basi con- 
cavo-pland, medio sulcatd, columelld valide calloso- 
tortd. 
Tue Mauritius Trocuus. Shell imperforate, pyrami- 
datly conical, rather solid, whitish, variegated with 
faint red and green; whorls convexly sloping, ob- 
liquely longitudinally grain-wrinkled and squamately 
tubereled, tubercles fading towards the base; base 
concavely flattened, grooved in the middle, columella 
strongly callously twisted. 
GMELIN, Syst. Nat. p. 3582. 
Pyramis Mauritianus, Adams. 
Trochus costifer, Jonas. 
Hab. Mauritius, Philippine Islands; Cuming. 
Partaking of the general character of 7. noduliferus, 
though apparently far removed from it. 
Species 20. (Mus. Cuming.) 
TROCHUS ACUTUS. 
ramidali, albidd, virescente-cinereo tincta ; anfractibus 
Troch. testd imperforatd, gracili-py- 
November, 1861. 
