OF CONCHOLOGY. 381 



cal in its character than that of the terrestrial shells. There 

 are here but few species similar to those of the east of Europe. 

 Most of the specimens are identical with, or similar to, those 

 of the Nile and of the Euphrates; and some of the genus Me- 

 lanopsis are peculiar to the Jordan or its feeders. It seems 

 probable that the inhabitants of the waters were better able 

 to sustain the cold of the glacial epoch than the Mollusks of 

 the land; and from the post-tertiary remains found by the 

 Dead Sea, we may infer that the species now existing have 

 been transmitted from a period antecedent to the glacial; while 

 the more boreal forms introduced at that epoch have main- 

 tained their existence in the colder districts of Northern Pales- 

 tine, to the exclusion of the southern species, which have not 

 succeeded in re-establishing themselves. The beautiful group, 

 Achatina, requiring a degree of moisture not generally found 

 in Palestine, is only represented by a few insignificant and al- 

 most microscopic species." 



One hundred and nineteen species are enumerated, collected 

 by the author, of which the following are new: — 



Succinea globosa. Glausilia Genezerethana. 

 Helix Carmelita. Medlycotti. 



" Masadee. Melania rubro-punctata. 



Bulimns Uritv. Melanopsis ammonis. 

 Papa Libanotica. Eremita. 



" Hebraica. Unio Simonis. 



" episcopalis. 



Conchologiea Iconica. by lovell reeve. Parts 254, 255. 4to., 

 London, 18G6. 



The following monographs are contained in the present 

 issue : — 



Yertagus. (Concluded.) Plates 3 to 8. March, 1866. 



Eulima. (Concluded.) Plates 5 and 6. March, 1866. 



Telescopium. 1 plate. March, 1866. 



Cerithidea. 2 plates. March, 1866. 



Unio. (Continued) Plates 81 to 38. March, 1866. 



"U. complanatus, Lea, &c," is made a synonym of U. coarc- 

 tatus, Lam. Had Solander been quoted for this species by 

 American authors, instead of following the pernicious practice 

 of changing the authority for the name with every change of 

 genus, this error would not have occurred. We are further 

 informed that "The synonymy of this species has been much 

 confused with that of Lea's Symphynota cornplanata,"\ which 

 belongs to the genus Margaritana. 



