Wood’s Linnean 
names. 
9 ARCTICA 
arctic 
1 Pompitius 
great chambered 
2 SCROBICULATUS 
sunk-spire 
3 LACUSTRIS 
lake 
4 CALCAR 
spur 
5 ROTATUS 
wheel 
6 LEVIGATULUS 
smooth 
7 DEPRESSULUS 
compressed 
8 CRISPUS 
keel-edged 
9 Beccarit 
Becearia’s 
10 Baxrutcus 
Baltic 
11 CRASSULUS 
strong 
12 UMBILICATU- 
LUS 
umbilicated 
13 LoBATULUS 
lobed 
OSTREA. 73 
Lamarchian 
Genus. 
Limacina Fabr. F. G. 386.—Clio helicina, Gm. 
—L. helicinalis, Lam.—Spiratella 
limacina, Bl. Greenland. 
Authority —Synonyms—Locality. 
NAUTILUS—SAILOR. 
Nautilus Lin. Sys.—Lam.—Sow. G.—Sow. Th. 
its plo. 97,7 fd: Indian Seas. 
—— Dil. (as of Sol.) 339.—. erassus, wm- 
bilicatus, Ch. x. f. 1274, 5.—W. 
umbilicatus, Lam.— Crouch. pl. 20, 
f. 16.—Sow. Th. ii. pl. 98, f. 7. 
New Guinea. 
Planorbis Lightfoot, Ph. Tr. Ixxvi. 163, pl. 1.— 
Mont.—P. nitidus, Drap. 46, pl. 2, 
f.17, 8, 9.—Segmentina n. and line- 
ata, Flem.—S. 1. Gray, Turt. 271, 
f. 99. Britain, §e. 
Mart. (as of Lin.) i. f. 169.—Dil. 340. 
Adriatic. 
Mat. and Rack. Tr. Lin. vii. for JV. 
calear of Mont. pl. 15, f. 4.— Dil. 
340. Britain. 
Mont. (as of Adams) Sup. pl. 18, f. 7, 
8.—Tr. Lin. vii. 115.— Dil. 341. 
Britain. 
Mont. (as of Adams) Sup. pl. 18, f. 9: 
—Tr. Lin. vii. 115.—Dul. 341. 
Britain. 
— Lin. Sys.—Mont. Sup. pl. 18, f. 5.— 
Dil. 341. Britain, Sc. 
Rotalia Lin. Sys.—Mont. Sup. pl. 18, f. 4.— 
Polysto- 
mella 

Polysto- 
mella 
Dil. 342. Britain, §e. 
——? Gm. from Schrot. Hin. i. 20, pl. 1, f. 
2. Baltic. 
Polysto- Mont. (as of Adams) Sup. pl. 18, f. 2. 
mella —Dil. 343. Britain. 
— Mont. (as of Adams) Sup. pl. 18, f. 1. 
— Dil. 343, Britain. 
Truncatulina Adams for Walk. T. M. f.71.—Serpula 
(D’ Orb.) lobata, Mont.—Z. 1. D’Orb. Can. 
For. pl. 2, f. 22,3, 4. Britain, fe. 
. 
