137 
This species is thinner and more ventricose than S. striata ; it is 
spotless, and more finely transversely grooved ; the spire is less acute, 
the outer lip not so much thickened and inflexed, and plicate, not 
crenate, internally. 
31. OpercuLATUM Pictum, A. Adams. O. testa orbiculato-ovali, 
plana, apice producto, fusco, incurvato, epidermide tenut, corneo 
obtecta, concentrice striata, albida, aurantiaco radiatim picta, intus 
nitida ad marginem aurantiaca. 
Hab. Lord Hood’s Island. Mus. Haslar. 
This species is richly painted with reddish-orange, disposed in a 
radiated manner round the outer margin, the rays extending towards 
the centre; the apex is hooked and more elevated than in the other 
species. The Linnean name of the genus is here used, but it has 
also been called Umbella by Chemnitz, and Umbrella by Lamarck. 
32. Srytirer Barronu, A. Adams. S. testa ovali, turrita, alba, 
nitida, semipellucida, apice mucronata, anfractibus septem, planis, 
postice angulatis, longitudinaliter oblique striatis ; apertura ob- 
longo-ovali, labro postice angulato, margine subincrassato. 
Hab. ? Mus. Cuming. 
This species, remarkable for the angulated form of the whorls, is 
named after its discoverer, Mr. Charles Barron, who found it im- 
bedded in the skin of a tropical species of Asterias, in which it 
had formed for itself a cystiform cavity. 
33. Panop#za Mippenporri, A. Adams. P. testa transversa, 
ovato-trigonali, alba, epidermide corrugata, cornea, Susca obtecta, 
transversim irregulariter plicata ; latere antico rotundato, angus- 
tiore, postico latiore, subtruncato, ligamento prominente. 
Hab. Arctic Seas. Mus. Haslar. 
This species appears to differ entirely in form from other known 
species, being more triangular and truncate posteriorly ; the epider- 
mis is peculiarly plicato-corrugate. 
34. RutzocuiLus ASPER, A. Adams. R. testa umbilicata, ovato- 
turrita, alba, rufo sparsim tincta, anfractibus sex, longitudinaliter 
plicatis, superne excavatis, in medio angulatis, transversim liratis, 
liris asperulatis, ad plicas spinulosis ; apertura ovali, canali brevi, 
via recurva, labro intus lirato. 
Hab. Gulf of California. Mus. Cuming. 
This is a very beautiful white Murev-like species, with transverse 
spinulose liree, and longitudinally plicate, angulated whorls. 
35. Rurzocuriius (CoratiiopHita) RADULA, A. Adams. R. 
testa ovali, imperforata, candida, spira prominula, anfractibus 
convexis, longitudinuliter plicatis, transversim liratis, liris squa- 
mulis, acutis, parvis asperulatis, interstitiis clathratis ; apertura 
ovali, intus violascente, canali brevi, excurvata, regione umbilicali 
impressa, labro intus sulcato. 
Hab. China. Mus. Cuming. 
