OF CONCHOLOGY. 81 



Journal of the Linnean Society, Vol. x, No. 44, Nov., 18G8, No. 45, 

 J;iu., 1869. 



Observations on the Septum of the Ccecida\ and sotne re- 

 marks on the subject of the suppression of the Genera 

 Brochina and Strebloceras or Phleboceras. By tlie 

 Marquis Leopold de Folin. Communicated by W. 

 Baird, M.D., F.R.S., &c. With a plate. 



The author proposes to suppress the latter genera, and merge 

 the species in the genus Ca^ciurn, on the ground of there not be- 

 ing suflQcient generic characters to warrant their separation. The 

 following new species are described : 



Ccecum formuJosum, Bahamas. 



" decussatum, " 



" infimum^ Aspinwall. 



" biynamillatum, La Guayra. 



" carmenense, Lagunam de Terminos. 



" orientale, Mersina. 



*' auriculatum, Palermam. 



" strigosum^ Rio Janeiro. 



" vestitu77i, Vera Cruz. 



" circumvolutum, Aspinwall. 



" torquatum, Guadaloupe. 



" cuceina, Vera Cruz. 



" Veracruzanum, " 



FRENCH. 



Journal de Conchyliologie. Vol. xviii, No. 1. 160 pp. 8to, and 3 plates. 

 Paris, January, 1870. 



Etude sur la mdchoire et Varmature linguale des Cylin- 

 drellidce et de quelques genres voisins sous le rapport 

 conchyliologique. By H. Crosse and P. Fischer. 



In this paper an attempt at a classification of the Cylindrellas 

 is made based upon the lingual dentition, and those species hav- 

 ing jaws are removed from the family and placed m Helicidce. 

 The species thus separated belong to the genera EucaJodium, 

 Berendtia and Holospira, and are essentially Mexican, while the 

 true CylindreUas are principally confined to the West Indies. 



The paper is prepared with great care, and will repay study. 

 I cannot agree with its authors in their estimate of the import- 

 ance of the jaw, and so far from arranging those species having 

 it in another family, I am not even convinced that its presence 

 is of generic value. 



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