211 
Long. 35 & 40 mill.; larg. 35 4 44 mill.; convex. 28 4 34 mill. 
Ouverture: long. exter. 32 4 39 mill., inter. 24 a 31 mill.; larg. 
15419 mill. Spire, haut. 12 a 14 mill. 
Natica Cumingiana valdé affinis, basi columellz crassiori extis ob- 
liqué truncata, angulo externo umbilici costeformi, rotundato, ob- 
tuso et in perforatione decurrente, angulo interno canalis majore et 
depressiore, apertura semirotunda, anticé dilatata sed non oblonga, et 
superné aucta differt. 
20. Natica Satanconensis. Nat. testd ovatd seu oblongd, ceruleo- 
Suscd seu fulvd, substriatd ; anfractibus quaternis depresso-con- 
vewis, superne conicis et zond aurantid marginatis ; spird conicd, 
obtusiusculd, pallidé cerulescente et albo fasciatd ; aperturd semi- 
rotundd, fulvo-castaned ; columelld rectd, in medio vix convexd, 
supra crassd, superne angulo transverso calloso instructd, ad um- 
bilicum sulco notatd ; umbilico profundo, coarctato, fulvo-aurantio ; 
canali arcuato, largo, funiculo superne oblongo, basi sensim atte- 
nuato modificato. 
Operculum pallide fulvum, radiatim striatum, tenue, et cartilagi- 
neum. Natice mamillaris, Lamk. (Natica fuscata, nobis) proxima 
sed diversa. 
Hab. “‘ Salango, West Colombia; found in sandy mud.” H. Cu- 
ming. 
Long. 26 mill. ; larg. 23 mill.; convex. 15 mill. Ouverture: long. 
exter. 242 mill., inter. 20 mill.; larg. 4 4 5 mill. 
21, Narica pyrirormis. Nat. testd oblongo-pyriformi, lacted, sub- 
striatd, nitidd ; anfractibus 5-6 convexiusculis, elongatis, superneé 
declivis : infimo ventricoso-conico, superné depresso; spird elon- 
gatd, conicd, apice puncto fusco-notatd ; aperturd obliqud, sub- 
semilunari, angustatd ; columelld rectiusculd, extis superné callosd, 
basi cum funiculo supra compresso consolidatd, umbilico parvo, 
eaterne occultante et canali arcuato profundo angustante ; labro 
tenuiusculo, subpellucido. 
Spird interdum superne lutescente. Anfractus ultimus sepe tenuiter 
striatum : striis inter oculum et lumen hyalinis. 
Hab. ‘ Tlo-Tlo, island of Panay ; found on the sand at low water,” 
H. Cuming : “and from Huan river, Australia; found in sandy mud 
by Lieut. Collie, R.N., ten fathoms.” 
22. Nartica aurantia, Lamk. 
Var. 8. Lutea seu straminea, Nerita mamilla, var. lutea, Linné, 
Mus. Lud. Olr. p. 675. no. 386. Natica straminea, nobis olim. 
Natica sulphurea, guorundam. 
Hab. “ Philippines; found on the reefs.” H. Cuming. Var. £. 
Amboina, Timor (Mus. Paris). 
B. Umbilicum nudum, pervium, nec funiculatum. 
* Testa subglobosa, operculum cartilagineum. 
23. Natica viotacea, Sowerby, Tankerville Catal. 
Natica amethystina, Lamarck’s collection. 
