Clafies Conchyliorum . 
S9 
XVI. 
Methodus Teftaceorum J. P. Breynii. 
ClafTes, III. Polythalamium, Teha tubuiofa, polythalamia, conica, re#a, vei 
in fp iram redam convoluta, cum fiphunculo thalamos trans- 
eunte. 
Genera fub alterna 
a. Orthoceras* Polythalamium in lineam rcclam * 
vel proxime ad redam accedentem extenfum , 
Species 
au Orthoceratites fiphunculo axem trans ~ 
eunte graciliori , lentijfime decrefcens ; 
thalamis olim , nunc articulis ampliori- 
bus. 
p. Orthoceratites fiphunculo axem trans- 
eunt e gracili ori fi fub ito decrefcens; tha- 
lamis olim , nunc articulis JlriUioribus 
aliquantulum . 
y. Orthoceratites fiphunculo axem trans- 
eunto gmtilto rififubi t o decrefcens ; tha- 
lamis olim , nunc articulis angufiifiimis , 
minus que convexis. 
s A Orthoceratites fiphunculo inter centrum 
& peripheriam pofito , aliquantulum 
xrajjiori , fidito decrefcenr ; thalamis 
olim^ nunc articulis ftricl i oribus. 
t. Orthoceratites fiphunculo inter centrum 
peripheriam fito gracili ori, fub ito de - 
xrefcms^ externe fulcatus; thalamis olim y 
nunc articulis fir icti oribus. 
Orthoceratites fiphone ad peripheriam 
pofito xrajfiori , lente decrefcens;, thalamis 
olim , nunc articulis latioribus. 
w. Orthoceratites fiphone ad peripheriam 
pofito crajfiore , decrefcens; thalamis 
olim 9 nunc articulis anguft i oribus, 
8. Orthoceratites fiphone ad peripheriam 
pofito crajfiore comprejjb , dente decres- 
cens; thalamis olim 5 zz/ozr articulis la- 
tioribus 
h z 
XVI. Me- 
