58 rALÉOZOOLOGIE ET PALÉOPHYTOLOGIE 



Brevi cenni descrittivi su alcuni echinodermi, brachiopodi, e mollusclii 

 del Miocène medio délia Maiella. 



G. Stefanini. 



Baker, Frank GoUins, The Value of Ecology in the Interprétation of 

 FossiL Faunas. School Science & Mathem., vol. XXI, pp. 323-27. Avril, 

 1921. 



The interprétation of the habitat conditions surrounding life buried in 

 fossil deposits is made intelligible only by a knowledge of the ecological 

 conditions surrounding similar biota of today. It is shown by référence to 

 deposits in glacial Wilmette Bay, Lake Chicago that by the ecological 

 method the habitat conditions may be reconstructed for any glacial life. 

 Errors of interprétation hâve arisen because the character of the species 

 in their habitat relations hâve not been accurately known. 



Aulhors ahslracl. 



Baker, Frank Gollins, New Forms of Pleistocene Mollusks from Illi- 

 nois. The Naulilus, vol. XXXV, pp. 22-24. Juillet 1921. 



Describes Amnicola lustica gelida and Valvala Iricarinala supracariiiata 

 from post-glacial deposits near Morris, Grundy Go., 111. 



Aulhors ahslracl. 



Baker, Frank Gollins, Pleistocene Mollusca from Indiana and Ohio. 

 Journ. of GeoL, vol. XXVIII, n» 5, pp. 439-57. .Juillet-août 1920. 



Lists the fauna of a post glacial deposit near Rush Lake, Logan Go., 

 Ohio, containing 27 species of aquatic mollusks. The fauna contains four 

 species now extinct. Also a deposit from Fiat Rock River, Bartholomew Go., 

 Indiana, which may possibly be of the Sangamon interglacial âge, containing 

 33 species of aquatic and land mollusks which are similar to species from the 

 old forest beds near Lawrenceburg which Leverett refers to the Sangamon 

 interval. 



Aulhor's ahslracl. 



Baker, Frank Gollins, Pleistocene Mollusca from Northwestern and 

 Central Illinois. Journ. of GeoL, vol. XXX, n» 1, pp. 43-62. Jan.-Feb. 

 1922. 



The biota of the great loess deposits of Illinois hâve been imperfectly 

 known. In this paper material obtained by Dr. M. M. Leighton in field 

 studies for the Illinois State Geological Survey is critically reviewed. The 

 modem. attempt to lump many forms under one name is shown to be detri- 

 mental to the study of fossil faunas, because many times two related forms 

 of the same species may be found in différent deposits, or one may be abun- 

 dant in fossil deposits and rare living. The area examined includes strata 

 of post Wisconsin âge (mostly aquatic), Peorian interglacial interval (mostly 

 land shells), and Wabash or pre-Recent âge (both land and aquatic species). 



