134 



cia antica maculisque parvis albidis ornata; anfractibus 5, longi- 

 tudinaliter costatis, tenuiter decussatim striatis, striis anticis 

 fortioribus ; apertura latiuscula, dentibus internis labii externi 

 paucis, majusculis. 



Shell obovate, rugulose, thick, of a violaceous black, with 

 an anterior band and very small dots of a whitish colour ; vo- 

 lutions 5, longitudinally ribbed, delicately decussately stri- 

 ated, anterior cross-strise stronger than the rest ; aperture 

 rather broad, internal teeth of the outer lip few, rather large. 



Gallapagos Islands, H. Cuming. 



67. Col. atramentaria. nob. (pi. xl. f. 174.) 



Col. testa ovato-acuminata, crassa, medio vextricosa, trans- 

 versim striata, nigra, anfractibus 5 — 6, tenuiter longitu- 

 dinaliter costatis ; apertura lata, labio externo incrassato, 

 interne denticulis sub-inconspicuis. 



Shell ovate, acuminated, thick, ventricose in the middle 

 transversely striated, black; volutions 5 — 6, with fine longi- 

 tudinal ribs ; aperture broad, outer lip thickened, with rather 

 inconspicuous small teeth within. 



Chatham Island, Gallapagos: G. B. Sowerby's collection. 



68. Col. Ticaonis nobis, (pi. xxxix. f. 132.) 



Col. testa oblonga utraque acuminata, medio turgido; palles- 

 cente, castaneo-sphacelata; anfractibus 6, transversim striatis, 

 suturis levatiusculis ; apertura oblonga, labio externo extiis 

 incrassato, margine tenui, denticulis internis paucis, parvulis. 



Shell oblong, acuminated at either extremity, turgid in the 

 middle, pale, splashed with chesnut colour; volutions 6, 

 transversely striated ; margin of the suture rather elevated ; 

 aperture oblong ; outer lip thickened externally ; its edge 

 thin, with a few small denticles within. 



Found at a depth of 7 fathoms in sandy mud, at the 

 Island of Ticao. H. Cuming. 



69. Col. decussata. Nobis, (pi. xxxix. f. 133.) 



Col. testa, oblonga, crassa, alba, fusco-marmorata ; anfrac- 

 tibus 5, turgidiusculis, decussatim costatis, apertura oblonga, 

 subsinuosa, labio externo albo, crasso, postice extiis obtuse 

 angulato, margine externo crenato. 



Shell oblong, thick, white, marbled with fuscous ; volutions 

 5, slightly turgid, with cross-ribs ; aperture oblong, rather 

 sinuous; outer lip white, thick, posteriorly obtusely angular 

 externally ; inner edge crenated. 



Australia, G. Humphrey. 



