FOR    THE    YEARS    1901-1905,   INCLUSIVE,  295 
Sapper  (Carl) — Continued. 
22.  Grundziige  des  Gebirgsbaus  von  Mittelamerika. 
Intern.  Geog.  Cong.,  Eighth,  Rept.,  pp.  231-238,  1  map,  1905. 
Describes  briefly  the  general  geologic  structure  of  Central  America, 
23.  Ein  neuer  Vulkanausbruch  in  Mittelamerika. 
Central  bl.  f.  Min.,  Geol.  u.  Pal.,  no.  G,  pp.  172-175,  1905. 
Describes  an  eruption  of  the  volcano  Momotombo  in  Nicaragua  that  took  place  in  January 
1905. 
24.  In  den   Vulcangebieten  Mittelamerikas  und  Westindiens:    Reiseschilderungen 
und  studien  iiber  die -Vulcanausbriiche  der  Jahre  1902  bis  1903,  ihre  geolo- 
gischen,  wirthschaftlichen  und  socialen  Folgen. 
Stuttgart;  Verlag  der  E.  Schweizerbartschen  Verlagsbuchhandlung  (E.  Niigele),  1905.    vi,  334 
pp.,  33  pis.  and  48  figs. 
Describes  volcanic  eruptions  of  1902-3,  and  physiographic  and  geologic  features  of  the  Lesser 
Antilles. 
Sardeson  (Frederick  W. ). 
1.  The  Saint  Peter  sandstone. 
Minn.  Acad.  Nat.  Sci.,  Bull.,  vol.  4,  no.  1,  pp.  64-88,  3  pis.,  1896. 
Discusses  geographic  distribution  and  lithologic  characters,  and  describes  the  fauna. 
2.  The  fauna  of  the  Magnesian  series. 
Minn.  Acad.  Nat.  Sci.,  Bull.,  vol.  4,  no.  1,  pp.  92-105.  2  pis.,  1896. 
3.  Problem  of  the  Monticuliporoidea.     I. 
Jour.  Geol.,  vol.  9,  pp.  1-27,  1  pi.  and  1  fig.,  1901. 
Describes  the  characters  of  various  species  of  Trepostomata  and  discusses  their  affinities. 
4.  Problem  of  the  Monticuliporoidea.     II. 
Jour.  Geol.,  vol.  9,  pp.  119-173.  1  pi.,  1  fig.,  1901. 
Describes  the  general  characters  of  various  species  of  Cryptostomata  and  discusses  their 
affinities. 
5.  Note  on  the  western  Tertiary. 
Science,  new  ser.,  vol.  13,  pp.  868-869,  1901. 
Contains  notes  on  the  occurrence  of  fossils  as  indicating  the  mode  of  formation  of  the  strata. 
6.  Paleozoic  fossils  in  the  drift  [Minnesota]. 
Minn.  Acad.  Nat.  Sci.,  Bull.,  vol.3,  pp.  317-318,  1901. 
7.  Fossils  in  the  St.  Peter  sandstone. 
Minn.  Acad.  Nat.  Sci.,  Bull.,  vol.  3,  pp.  318-319,  1901. 
8.  The  lower  Silurian  formations  of  Wisconsin  and  Minnesota  compared. 
Minn.  Acad.  Nat.  Sci.,  Bull.,  vol.  3,  pp.  319-326,  1  fig.,  1901. 
9.  The  range  and  distribution  of  the  lower  Silurian  fauna  of  Minnesota,  with  descrip- 
tions of  some  new  species. 
Minn.  Acad.  Nat.  Sci.,  Bull.,  vol.  3,  pp.  320-343.  1901. 
10.  On  the  deceptive  fossilization  of  certain  pelecypod    species   and  on  the  genus 
Eurymya. 
Am.  Geol.,  vol.  30,  pp.  39-45,  9  figs.,  1902. 
Describes  the  preservation  of  Modiolopsis  plana  Hall. 
11.  The  Carboniferous  formations  of  Humboldt,  Iowa. 
Am.  Geol.,  vol.  30,  pp.  300-312,  1  pi.,  1902. 
Describes  the  occurrence  of  the  Kinderhook  at  this  locality  and  the  characters  of  the  fossils 
collected. 
12.  ( )bservations  on  the  genus  Romingeria,  by  Charles  E.  Beecher. 
Am.  Geol.,  vol.  32,  pp.  260-261,  1903. 
13.  The  phylogenic  stage  of  the  Cambrian  Gastropoda. 
.lour.  Geol.,  vol.  11,  pp.  469-492,  2  pis.,  1903. 
14.  A  particular  case  of  glacial  erosion. 
Jour.  Geol.,  vol.  13,  pp.  351-357,  2  figs.,  1905. 
