1904.] NATURAL SCIENCES OF PHILADELPHIA. 411 
EUCONULUS TURBINATUS. 
ZONITOIDES BRISTOLI. 
VERTIGO NUMELLATA. 
bh MARKI. 
CARYCHIUM BERMUDENSE. | 
‘ZONITOIDES MINUSCULUS. North America and West Indies. 
*BIFIDARIA RUPICOLA. Florida, Cuba. 
‘STROBILOPS HUBBARDI. Florida, Jamaica. 
THYSANOPHORA HYPOLEPTA. West Indies. 
SUCCINEA BERMUDENSIS. West Indies. 
Eastern North America. 
-_ = , 
Total, 17 forms, 14 of them probably peculiar to Bermuda. For 
comparison we have the following recent species, supposedly not im- 
ported by man: 
PCILOZONITES BERMUDENSIS, 
e REINIANUS, 
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© RU NIE | Remnant of the fossil fauna. 
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°ZONITOIDES MINUSCULUS, Seven species 
THYSANOPHORA HYPOLEPTA, 
SUCCINEA BERMUDENSIS, 
°BIFIDARIA RUPICOLA. J 
°PUPOIDES MARGINATUS. North America, West Indies. 
STHYSANOPHORA VORTEX, | 
‘POLYGYRA MICRODONTA, | 
*BIFIDARIA SERVILIS, West Indies. Five species. 
SBIFIDARIA JAMAICENSIS, | 
HELICINA CONVEXA. | 
Total, 13 species, 6 of them probably peculiar to Bermuda. 
Dr. Pilsbry’s conclusion, from the anatomy of Pecilozonites, that the 
oldest importations to Bermuda came from continental America, is thus 
confirmed by a large majority of the fossilforms. Bermuda, at the time 
of the No. 807 deposit, was characterized by not less than five genera 
of continental affinities, of which at least one had been resident long 
enough to have developed new generic characters and a respectable 
diversity of species. The abundance of the individuals, too, and the 
size and variability of some of the species, seem to show that the island 
was not inhospitable to continental genera at that epoch. There were 
not only the large extinct species Pecilozonites nelsoni and Pecilozo- 
nites cupula, but larger varieties also of Pacilozonites bermudensis and 

4 Species not peculiar to Bermuda. 
5 Species not peculiar to Bermuda. 
