OF coNciioLoay. 173 



2. That at this epoch the Strait of Gibraltar did not exist, 

 o. That the Mediterranean communicated with the Ocean 

 by the desert of Sahara, wliich at this time was a vast sea. 



Bulletin de I'Academie Imperiale des Sciences de St. Peters- 

 burg. V. Parts 30-33. 4to. St. Petersburg. 



VorJdufige Diagnosen einigerneuer Gasteropoden-Arten cms 

 dem Nord Japanischen Meere. BY DR. L. V. schrenck. 

 Chiton A Ibrechtii. Trochus glohularius. 



•' Lindholmii. Natica hiclneta. 



Trochus Nordmannii. Tritonium {Fusus) Jessoense. 



"■ snhfvscescens. " {Buccinum) peri- 



" Jessoensis. codtUon. 



"■ iridescens. Volnta pusilla. 



Annales des Sciences Naturelles. 5th Series. Zoologie. Vol. 

 4. No. 6. December, 1865. 



Comment les lantJdnes font leur Flotteur. BY DR. lacaze 

 DUTIIIERS. 



Recherches sur VCEil de quelqnes Cephalopodes. BY PROF. 

 VICTOR HENSEN". 



(Extracted from Zeitschr fiir Wiss. Zoologie, xv., 1865.) 



GERMAN. 



Monographia Pnuemonopomorum viventium. Supplementum 

 secundum, by dk. louis pfeiffer. 284 pp., 8vo. Theodore 

 Fischer, Cassel, 1865. 



Within the past few years, no other department of Malaco- 

 logical science has progressed so rapidly as the terrestrial 

 Mollusca. A host of enterprising collectors and naturalists 

 liave confined their attention to these shells alone, and have 

 pursued the study with unequalled success. We look in vain 

 through the literature of Marine Conchology for the same 

 critical acumen and thorough knowledge of the subject ; and 

 among the fluviatile families, one only (Unionidse) hsis been 

 equally well studied. 



We believe that the entire credit of originating and pro- 

 moting Terrestrial Malacology as a separate study, should be 

 awarded to Dr. Louis Pfeiffer, who has unceasingly worked 

 for many years in publishing a complete Bibliography of the 

 vspecies; besides his "Malacozoologische Blatter" and "Novi- 



