198 MR. BRODERIP’S DESCRIPTIONS OF SOME 
Diam. ~ poll., alt. +. 
Hab. ad Aricam Peruviz. 
Dredged up from sandy mud at a depth of nine fathoms. 
Subgenus Catyrsoprsis, Less. 
Cyatho interno integro, lateraliter adherente. 
Before I proceed to describe the species of this subgenus which appear to me to be 
new, I must refer to the finest specimens of Cal. Extinctorium, Lam., and of Cal. spi- 
nosa, Sow., and its varieties, that I have hitherto seen. The specimen of Cal. Extinc- 
torium was taken by Mr. Cuming at Guaymas in the Gulf of California: its length is 
2< inches, its breadth 23, and its height 1}. The large-spined varieties of Cal. spinosa 
(Tab. XXVIII. fig. 8.) were found under stones at low water at St. Elena and at Lobos 
Island, and some small-spined varieties were dredged from sandy mud, adhering to 
stones and shells, at a depth of from six to eight fathoms, at St. Elena. In all the 
varieties the spines are tubular. The originals are in Mr. Cuming’s collection. It 
will be observed that the specimen of Cal. spinosa is so flat that the edge of the cup is 
considerably below the margin of the external shell, whereas the species is generally 
more or less conical, the apex of the cone often rising to a fair height. 
6. CALYPTR&A RADIATA. 
Tab. XXVII. Fig. 6. 
Cal. testd conico-orbiculari, albidd fusco radiata, striis longitudinalibus crebris ; limbo ere- 
nulato ; apice acuto, subrecurvo ; cyatho depresso. 
Diam. 1 poll., alt. =8:. 
Hab. in America Meridionali. (Bay of Caraccas.) 
The cup of this pretty species is pressed in, as it were, on one side, and adheres to 
the shell, not only by its apex, but also by a lateral seam, which scarcely reaches to the 
rim of the cup. The apex of the younger specimens, both externally and internally, is 
generally of a rich brown, and there can be little doubt that when first produced they 
are entirely of that colour. 
Found in sandy mud on dead shells, at a depth of from seven to eight fathoms. 
7. CALYPTREA IMBRICATA. 
Tab. XXVII. Fig. 7. 
Cal. testd albidd, crassd, subconicd, ovatd, costis longitudinalibus et squamis transversis 
imbricata ; apice subincurvo, acuto ; limbo crenato ; cyatho depresso. 
