
STEADMAN AND COTTON—CLASSIFICATION OF THE COWRIES 509 
KEY TO GENERA OF ADUSTINAE. 
a. Rotund. 
b, Unicoloured, 
ce Brown ws 0, 8 ne ete ae oe .. Adusta 
ce, White te sla ot re te an te .. Albaocupraea 
bb. Not unicoloured. 
d, Blotehed, speckled or say i 
e. Rostrate .. “7 iS: +. rw .. Notadusta 
ee, Not rostrate, 
f. Blotehed and speckled. 
g. Large dorsal bloteh .. ee + vs .. Neobernaya 
gg. Small blotch and sphek ise. 
h.. Base rounded i be “< a .. Solvadusta 
bh, Basa lesa rounded . bs oe ai -- Gratiadusta 
f. Banded va ’ a “ ‘4 oe ., Palmadusta 
an. Less rotund, 
i, Ocellate . - i 2 Le i .. Oribraria 
i, Not ocellate, 
j. White be 7 at -+ .. Nwvigena 
jj- Coloured. 
k, Margins spotted ,. +e -. Zonaria 
kk. Margins not spotted ia .. Schilderia 
Subfamily Narinae. 
Twenty millimetres in length or less; ovate, depressed; extremities not or 
slightly produced ; not or slightly umbilicate; speckled, banded, blotched; smooth ; 
teeth fine to medium, not produced across the base; margin not calloused; base 
flattened but not spreading. 
Genera are: Naria Broderip, 1837, Cypraea wrorata Gray, 1828. Hvenaria 
Tredale, 1930, Cypraea asellus Linné, 1758, Melicerona Iredale, 1930, Cypraea 
listert Gray, 1828 = Cypraea melwilli Hidalgo, 1906, Paulonaria Tredale, 1980, 
Cypraea beck Gaskoin, 1836. Two genera belonging to this subfamily were 
introduced by Iredale, 1939, and listed in the Zoological Record 1939, 76 as 
Cupinota “‘gen, nov,’’ (non, descr.) and ‘‘Opponaria’”’ “‘ gen. nov.’’ (non. deser.). 
These are synonyms of Paulonaria Iredale 1980, diagnosed in our Key. 
KEY TO GENERA OF NARIINAE. 
a, Narrow, subeylindrical, depressed -. Naria 
aa. Wider, ylindrical ovate, Hepreania: Dotted, banded or ‘spotted, 
Dotted . ‘ ‘ . .. Paulonaria 
bb, Banded or spotted. | 
«. Banded ae L- a. wt -¥ -- Bvenaria 
ec, Spotted and banded . 's s =. aes r -. Melicerona 
Subfamily Mauririinae. 
One hundred millimetres in length or less ; ovate to subeylindrical ; extremities 
not produced ; not umbilicate; spotted or with arabic like markings or mozaic pat- 
terned; smooth; teeth coarse to medium, not produced across the base; margin 
calloused; base flattened or spreading. Genera are: Mauritia Troschel, 1863, 
Cypraca mauritiana Linné, 1758 = Maurina Jousseaume, 1884 — Mauxiena 
Jousseaume, 1884, Vrona Jonsseaume, 1884, Cypraea stercoraria Linné, 1758, 
Arabica Jousseaume, 1884, Cypraea arabica Linné, 1758. For the Indian Ocean 
subspecies we use argiolus Bolten, 1798, designating Mauritius as the type locality. 
Bolten briefly but. aptly described the species as ‘‘Der Kleine Argus.”’ 
Cypraea retifera Menke, 1829, isa nomen nudum, but vone Steadman and Cot- 
ton 1948 is available for the Polynesian subspecies, 
