6 Mr. E. A. Smith on Mollusca from the 
who has made a special study of the Columbellide, and has 
kindly examined it for me. 
Ranella (Biplex) perca (Perry). 
Hab. Station 151, off Colombo, in 142-400 fathoms. 
The examples of this well-known shell in the present 
collection are practically identical with the ordinary Japanese 
form. The knowledge of the extended range of this species 
lends support to the statement by Reeve, that it was obtained 
at the Philippine Islands by Mr. Cuming. It is interesting 
to note that Mr. G. B. Sowerby has also recorded the occur- 
rence of another Japanese form (Xenophora pallidula) from 
188 fathoms off the Andaman Islands. 
Natica albospira. (PI. I. fig. 8.) 
Testa parva, globosa, anguste umbilicata, pallide fuscescens, infra 
suturam et circa basin alba; spira brevis, parva, ad apicem 
minuta; anfractus 53, convexi, celeriter accrescentes, sutura pro- 
funda canaliculata discreti, superiores 23 leves, cateri infra 
suturam oblique plicati, plicis inferne scnsim evanidis, ultimus 
globosus, striis spiraliLus obsoletis sculptus; umbilicus paryus, 
callo intrante crasso semiimpletus; apertura semicircularis ; 
columella obliqua, incrassata, lubro callo tenui juncta; operculum 
testaceum, griseum, supra spiram olivaceo tinctum, planum, 
margine externo arcuato porca duplice incrassato, liris paucis 
inconspicuis porce parallelis striisque radiantibus haud conspicuis 
sculptum, 
Diam. maj. 123 millim., min. 9, alt. 12; apertura 94 longa, 54 lata. 
Hab. Station 172, off Trincomalee, Ceylon, in 200-350 
fathoms. 
Judging from the single specimen in the collection, it seems 
probable that this species may sometimes exceed the dimen- 
sions given above. It differs from the young of N. rufa in 
the absence of the pale peripheral zone, in the greater 
number of whorls, the stronger plications, smaller nucleus, 
and different operculum. 
Natica candidula. (Pl. I. fig. 9.) 
Testa parva, globosa, alba, infra suturam zona opaco-albida picta, 
mediocriter umbilicata ; spira prominula; anfractus quatuor, con- 
vexi, leves, sed infra suturam oblique obsolete plicati ; umbilicus 
profundus, pervius, simplex; apertura semicircularis ; columella 
obliqua, leviter incrassata, superne callo reflexo labro juncta. 
Diam. maj. 9 millim., min. 7, alt. 9; apertura 6 longa, 4 lata. 
Hab, Station 151, off Colombo, in 142-400 fathoms. 
