TROCHUS.—Ptate IX. 
Lamarck, Anim. sans vert. vol. ix. p. 125. 
Stella rotularia, Adams. 
Hab. Australia. 
The marginal frill is so closely compressly puckered 
round the periphery of this species as to form a kind of | 
ruff. 
Species 49. (Mus. Cuming.) 
TROCHUS FIMBRIATUS. Zroch. testd imperforatd, subde- 
presse conoided, calcareo-albé ; anfractibus plano-de- 
clivibus, obscuré corrugato-striatis, ad marginem plus | 
minus ampliter expanso-fimbriatis ; basi convexd, lirata, 
liris parum imbricatis. 
THE FRILLED Trocuus. Shell imperforate, rather de- 
pressly conoid, chalk-white ; whorls flatly sloping, ob- 
scurely wrinkle-striated, more or less largely ex- 
pandedly frilled at the margin ; base convex, ridged ; 
ridges but little imbricated. 
Lamarck, Anim. sans vert. vol. ix. p. 195. 
Uvanilla finbriata, Adams. 
Hab. Australia. 
The marginal frill, instead of being puckered vertically, 
as in the preceding species, is expanded horizontally. 
Species 50. (Mus. Cuming.) 
Trocuus unGuIS. Troch. testé imperforatd, sublaté co- 
noided, purpurascente-spadiced ; anfractibus convexo- 
declivibus, undique corrugato-liratis et striatis, ad 
marginem squamis fornicatis descendentibus radiatis ; 
basi concaviusculad, densé minute lamellato-imbricata. 
Tue NAIL Trocuus. Shell imperforate, rather broadly 
conoid, purplish-fawn; whorls convexly sloping, 
wrinkle-ridged and striated throughout, rayed at the 
margin with descending vaulted scales; base rather 
concave, densely minutely lamellately imbricated. 
Woop, Ind. Test. Supp. pl. 5. f. 2. 
Uvanilla unguis, Adams. 
Hab. Panama, California. 
A shell of lighter growth than 7. zmdricatus, more hol- 
low and less imbricately ridged at the base; it is also 
differently coloured. 
