POLYNESIAN REGION. 105 
they are chiefly, perhaps entirely, colonised by drift from the 
other islands. 
The volcanic groups are the Ladrones, Sandwich Islands, and 
Marquesas, to the north of the low coral zone ; and to the south 
of it, the Salomons, New Hebrides, New Caledonia, and F'eejees 
-—the Friendly Islands, Navigator’s and Cook’s Islands—Society 
and Austral Islands, ending with Pitcairn’s and Elizabeth 
Island. Many of these are very lofty. Their molluscan fauna 
is entirely peculiar, but it has most affinity with those of New 
Zealand and the Asiatic Islands, and great analogy with those 
of St. Helena, Brazil, and the West Indies. 
Salomons—New Hebrides—New Caledonia—Feejees. 
The most remarkable land-shells of these islands are the great 
auriculoid, Bulimi (e.g. B. auris-bovine and B. miltochlius of 
the Salomons). <Acicula striata and 2 sp. of Cyrena are found 
at Vanicoro; and Physa sinuata, Peronia acinosa and corpulenta, 
and seyeral Neritinas and coronated Melanias, have been ob- 
tained at the Feejees.* 
IER GTENC co Sao slas ses ave seeoae 18 IBULMNUS i iesccssscesesss 10 Cyclophorus ..,.....0006 2 
NEUES Pes vosd, Seco ac 2 Partly cccscesssssce cosas 6 Omphalotropis ......... 1 
UTI ye 6 AGICUI Ei eetcceccsseeceees 1 HLCIICIN Ase eenasensenesecst 6 
Friendly Islands—Navigator’s—Society Islands. 
The principal lofty and rocky islands of the southern Pacific, 
at which land shells have been obtained, are Tonga, Samoa, 
Upolu, and Manua; Tahiti, Oheteroa, and Opara; Pitcairn’s 
Island and Elizabeth Island. Each appears to have some pecu- 
liar species and some common to other islands; the little raised 
coral islet Aurora (Metia), north-east of Tahiti, 250 feet in ele- 
vation, has four land-snails which have been found nowhere 
else—Helix pertenuis, dedalea, Partula pusilla, Helicina trochlea. 
*‘Samoa and the Friendly Islands must have intimate geo- 
logical relations; the same forms, and many of the same species 
of land shells, occur on both groups; not a single Feejeean 
species was collected on either.” (Gould.) 
PENNER cs cnc ces chacelsdess 135 Tornatellina, ........006 6 Cyclophorus srissseesaee 5 
RTI che dscsvescteiss 18 BUDDE voces sescadticostces 3 Omphalotropis ......... 6 
SIONS ei ccch sea sip vees 1 SUCCINEA ...cececcevsees 12 TCM CIN aassdcevereesess 13 
RIMINI aN do dad'cacexsccese 15 HC CHIN GE) spcceodenetenes 1 
The fluyiatile shells are species of Physa, Melania, Assiminea 
* The Feejees (Viti) are more nearly allied to the westward islands, such as the 
New Hebrides, than the Friendly Islands. Succinea and Partula, so plentiful at the 
latter, are not found at the Feejees. (Gould, U.S. Exploring Expedition). 
FO 
