TROCHUS. 
Puate IX. 
Species 44. (Mus. Cuming.) 
TRocHUs astTERIscus. Troch. testé imperforatd, sub- 
acute conicd, flavescente-spadiced ; anfractibus oblique 
subobsoleté rugatis, ad marginem squamatis, squamis 
magnis, fornicatis ; basi convero-pland, liratd, callo 
centrali interdum roseo, interdum ceruleo-virente. 
THE ASTERISK TRocuts. Shell imperforate, rather sharply 
conical, yellowish-fawn ; whorls obliquely somewhat 
obsoletely wrinkled, scaled at the margin, scales 
large, vaulted ; base convexly flattened, ridged, cen- 
tral callosity sometimes rose, sometimes blue-green. 
Reeve, Pro. Zool. Soc. 1842, p. 184, Conch. Syst. pl. 
PW its He 
Trochus stellatus ? Gmelin. 
Hab. Port Essington, Australia (on the reefs at low 
water) ; Jukes. 
The scales are, in this species, peculiarly vaulted at the 
margin ; and the basal callosity is either blue-green, as in 
T. columellaris, or rose-red as in 7’. rhodostoma. 
Species 45. (Mus. Cuming.) 
TrocHus TuBEROSUS. Troch. testd imperforatd, subobtuse 
conicd, spadiceo-albaé ; anfractibus irregulariter rudé 
granatis et corrugato-plicatis, versus marginem biseri- | 
atim tuberculatis, tuberculis brevibus, erectis; basi 
squamato-liratd, callo livido-purpurascente. 
THE TUBEROUS TRocHvs. Shell imperforate, rather ob- 
tusely conical, fawn-white ; whorls irregularly rudely 
grained and wrinkle-plaited, with a double row of 
short erect tubercles at the margin; base scale- | 
ridged, callosity pale livid-purple. 
Puitrerr, Abbild. und Besch. Conch. vol. i. p. 69. pl. 2. 
f. 11. 
Hab. ? 
The external sculpture of this species is not unlike that 
of 7. celatus, but the base partakes more of the cha- 
racter of 7’. rhodostoma. 
Species 46. (Mus. Cuming.) 
interdum obsoleté ; 
squamato-lirata. 
Urvitin’s Trocuus. Shell imperforate, obtusely conoid, 
rather thin, dead-white, tinged with rust; whorls 
concavely sloping, irregularly grain-wrinkled, thinly 
plicately frilled at the margin, frill sometimes obso- 
lete; base concavely flattened, finely scale-ridged. 
Pururprt, Kiister, Conch. Cab. p. 215. pl. 32. f. 4. 
Trochus fimbriatus, var., Quoy and Gaimard. 
Hab. Sydney (in rocky places at low water) ; Jukes. 
basi concavo-planatd, subtiliter 
The margin of the whorls incline to become fimbriated, 
and the species is carried by the gradually increasing de- 
velopment of this character into 7. jfimbriatus, figured 
| below it. 
| THE WATER-WHEEL TROCHUS. 
Trocnus Urvitier. Troch. testé imperforatd, obtuse | 
conoided, tenuiculd, sordidé alba, ferrugineo-tincta ; un- 
fractibus concavo-declivibus, wregulariter granato-cor- | 
rugatis, ad marginem tenue plicato-fimbriatis, fimbria | 
Species 47. (Mus. Cuming.) 
Trocuus steLuatus. Zroch. testd imperforatd, conoided, 
crassd, purpurascente-spadiced ; anfractibus oblique 
corrugato-liratis, ad marginem tuberculis squamatis 
amplis subfimbriatis armatis ; basi convead, dense im- 
bricato-squamaté. 
| Tue star Trocuus. Shell imperforate, obtusely conoid, 
thick, purplish-fawn ; whorls obliquely wrinkle- 
ridged, armed at the margin with large slightly fim- 
briated squamate tubercles; base convex, densely 
imbricately scaled. 
Cuemnitz, Conch. Cab. vol. v. p. 47. pl. 164. f. 1552. 
Turbo stellaris, Gmelin. 
Trochus stellaris, Lamarck. 
Hab. New Caledonia. 
This fine species is the representative in Australian 
waters of the Philippine 7. calcar. 
Species 48. (Mus. Cuming.) 
Trocuus RotuLaRiIus. Zroch. testd imperforatd, depresse 
conoided, calcareo-alba, virescente pallideé tinctd ; an- 
fractibus plano-declivibus, subcorrugatis, ad marginem 
creberrimé compressé plicato-fimbriatis ; basi convexd, 
densé imbricato-lirata. 
Shell imperforate, de- 
pressly conoid, chalk-white, faintly tinged with green; 
whorls flatly sloping, slightly wrinkled, very closely 
compressly plicately frilled at the margin; base con- 
yex, densely imbricately ridged. 
December, 1861. 
